2011-03-19 07:20:11 -03:00
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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
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2011-12-03 21:54:38 -04:00
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2011-07-17 07:32:00 -03:00
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static int
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2011-11-07 18:24:32 -04:00
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get_stabilize_roll(int32_t target_angle)
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2010-12-19 12:40:33 -04:00
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{
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2011-12-03 21:54:38 -04:00
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// angle error
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2012-01-29 02:00:05 -04:00
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target_angle = wrap_180(target_angle - dcm.roll_sensor);
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2011-01-25 01:53:36 -04:00
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2011-12-08 08:30:47 -04:00
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#if FRAME_CONFIG == HELI_FRAME
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2012-01-29 02:00:05 -04:00
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2011-12-08 08:30:47 -04:00
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// limit the error we're feeding to the PID
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2012-01-29 02:00:05 -04:00
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target_angle = constrain(target_angle, -4500, 4500);
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2011-12-11 03:25:52 -04:00
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2011-12-08 08:30:47 -04:00
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// convert to desired Rate:
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2012-01-29 02:00:05 -04:00
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target_angle = g.pi_stabilize_roll.get_pi(target_angle, G_Dt);
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2011-12-11 03:25:52 -04:00
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2011-12-08 08:30:47 -04:00
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// output control:
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2012-01-29 02:00:05 -04:00
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return constrain(target_angle, -4500, 4500);
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2011-12-08 08:30:47 -04:00
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#else
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2012-01-29 02:00:05 -04:00
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2011-07-10 21:47:08 -03:00
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// limit the error we're feeding to the PID
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2012-01-29 02:00:05 -04:00
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target_angle = constrain(target_angle, -2500, 2500);
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2011-07-10 21:47:08 -03:00
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2012-02-17 02:07:35 -04:00
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// convert to desired Rate:
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2012-01-29 02:00:05 -04:00
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int32_t target_rate = g.pi_stabilize_roll.get_p(target_angle);
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int16_t iterm = g.pi_stabilize_roll.get_i(target_angle, G_Dt);
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2011-12-11 03:25:52 -04:00
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2012-01-29 02:00:05 -04:00
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return get_rate_roll(target_rate) + iterm;
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2011-12-08 08:30:47 -04:00
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#endif
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2011-04-25 02:12:59 -03:00
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}
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2011-07-17 07:32:00 -03:00
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static int
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2011-11-07 18:24:32 -04:00
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get_stabilize_pitch(int32_t target_angle)
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2011-01-25 01:53:36 -04:00
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{
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2011-12-03 21:54:38 -04:00
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// angle error
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2012-01-29 02:00:05 -04:00
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target_angle = wrap_180(target_angle - dcm.pitch_sensor);
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2011-02-17 05:36:33 -04:00
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2011-12-08 08:30:47 -04:00
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#if FRAME_CONFIG == HELI_FRAME
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2010-12-19 12:40:33 -04:00
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// limit the error we're feeding to the PID
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2012-01-29 02:00:05 -04:00
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target_angle = constrain(target_angle, -4500, 4500);
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2011-12-11 03:25:52 -04:00
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2011-12-08 08:30:47 -04:00
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// convert to desired Rate:
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2012-01-29 02:00:05 -04:00
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target_angle = g.pi_stabilize_pitch.get_pi(target_angle, G_Dt);
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2011-12-08 08:30:47 -04:00
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// output control:
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2012-01-29 02:00:05 -04:00
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return constrain(target_angle, -4500, 4500);
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2011-12-08 08:30:47 -04:00
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#else
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2012-01-29 02:00:05 -04:00
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// limit the error we're feeding to the PID
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target_angle = constrain(target_angle, -2500, 2500);
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2011-04-10 17:31:33 -03:00
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2011-12-12 21:45:27 -04:00
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// conver to desired Rate:
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2012-01-29 02:00:05 -04:00
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int32_t target_rate = g.pi_stabilize_pitch.get_p(target_angle);
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int16_t iterm = g.pi_stabilize_pitch.get_i(target_angle, G_Dt);
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2011-12-03 21:54:38 -04:00
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2012-01-29 02:00:05 -04:00
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return get_rate_pitch(target_rate) + iterm;
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#endif
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}
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2010-12-19 12:40:33 -04:00
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2012-01-29 02:00:05 -04:00
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static int
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get_stabilize_yaw(int32_t target_angle)
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{
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// angle error
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target_angle = wrap_180(target_angle - dcm.yaw_sensor);
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2011-07-10 21:47:08 -03:00
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2012-01-29 02:00:05 -04:00
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// limit the error we're feeding to the PID
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target_angle = constrain(target_angle, -2000, 2000);
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2011-12-29 14:23:18 -04:00
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2012-01-29 02:00:05 -04:00
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// conver to desired Rate:
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int32_t target_rate = g.pi_stabilize_yaw.get_p(target_angle);
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int16_t iterm = g.pi_stabilize_yaw.get_i(target_angle, G_Dt);
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2011-12-29 14:23:18 -04:00
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2012-01-29 02:00:05 -04:00
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#if FRAME_CONFIG == HELI_FRAME // cannot use rate control for helicopters
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if(!g.heli_ext_gyro_enabled){
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return get_rate_yaw(target_rate) + iterm;
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}else{
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return constrain((target_rate + iterm), -4500, 4500);
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}
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#else
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return get_rate_yaw(target_rate) + iterm;
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2011-12-08 08:30:47 -04:00
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#endif
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2011-01-25 01:53:36 -04:00
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}
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2012-02-09 01:09:24 -04:00
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static int
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get_acro_roll(int32_t target_rate)
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{
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2012-02-15 15:29:25 -04:00
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target_rate = target_rate * g.acro_p;
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2012-02-09 01:09:24 -04:00
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target_rate = constrain(target_rate, -10000, 10000);
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return get_rate_roll(target_rate);
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}
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static int
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get_acro_pitch(int32_t target_rate)
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{
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2012-02-15 15:29:25 -04:00
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target_rate = target_rate * g.acro_p;
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2012-02-09 01:09:24 -04:00
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target_rate = constrain(target_rate, -10000, 10000);
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return get_rate_pitch(target_rate);
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}
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2012-02-11 02:22:19 -04:00
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static int
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get_acro_yaw(int32_t target_rate)
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{
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target_rate = g.pi_stabilize_yaw.get_p(target_rate);
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target_rate = constrain(target_rate, -15000, 15000);
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return get_rate_yaw(target_rate);
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}
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2011-07-17 07:32:00 -03:00
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static int
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2012-01-29 02:00:05 -04:00
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get_rate_roll(int32_t target_rate)
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2011-01-25 01:53:36 -04:00
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{
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2012-02-17 02:38:23 -04:00
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int16_t rate_d1 = 0;
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static int16_t rate_d2 = 0;
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static int16_t rate_d3 = 0;
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2012-01-29 02:00:05 -04:00
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static int32_t last_rate = 0;
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2012-02-17 02:38:23 -04:00
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2012-01-29 02:00:05 -04:00
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int32_t current_rate = (omega.x * DEGX100);
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2011-07-10 21:47:08 -03:00
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2012-02-17 02:38:23 -04:00
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// History of last 3 dir
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rate_d3 = rate_d2;
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rate_d2 = rate_d1;
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rate_d1 = current_rate - last_rate;
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last_rate = current_rate;
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2012-01-29 02:00:05 -04:00
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// rate control
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2012-02-17 02:38:23 -04:00
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target_rate = target_rate - current_rate;
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target_rate = g.pid_rate_roll.get_pid(target_rate, G_Dt);
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2011-02-17 05:36:33 -04:00
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2012-01-29 02:00:05 -04:00
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// Dampening
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2012-02-17 02:38:23 -04:00
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//int16_t d_temp = (float)(current_rate - last_rate) * g.stabilize_d;
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//target_rate -= constrain(d_temp, -500, 500);
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//last_rate = current_rate;
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// D term
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// I had tried this before with little result. Recently, someone mentioned to me that
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// MultiWii uses a filter of the last three to get around noise and get a stronger signal.
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// Works well! Thanks!
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int16_t d_temp = (rate_d1 + rate_d2 + rate_d3) * g.stabilize_d;
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2012-02-23 13:14:27 -04:00
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d_temp = constrain(d_temp, -400, 400);
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2012-02-17 02:38:23 -04:00
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target_rate -= d_temp;
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2011-12-07 01:03:56 -04:00
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2012-01-29 02:00:05 -04:00
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// output control:
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return constrain(target_rate, -2500, 2500);
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}
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static int
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get_rate_pitch(int32_t target_rate)
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{
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2012-02-17 02:38:23 -04:00
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int16_t rate_d1 = 0;
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static int16_t rate_d2 = 0;
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static int16_t rate_d3 = 0;
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2012-01-29 02:00:05 -04:00
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static int32_t last_rate = 0;
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2012-02-17 02:38:23 -04:00
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2012-01-29 02:00:05 -04:00
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int32_t current_rate = (omega.y * DEGX100);
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2011-12-08 09:23:50 -04:00
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2012-02-17 02:38:23 -04:00
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// History of last 3 dir
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rate_d3 = rate_d2;
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rate_d2 = rate_d1;
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rate_d1 = current_rate - last_rate;
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last_rate = current_rate;
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2012-01-29 02:00:05 -04:00
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// rate control
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2012-02-17 02:38:23 -04:00
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target_rate = target_rate - current_rate;
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target_rate = g.pid_rate_pitch.get_pid(target_rate, G_Dt);
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2012-01-29 02:00:05 -04:00
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// Dampening
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2012-02-17 02:38:23 -04:00
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//int16_t d_temp = (float)(current_rate - last_rate) * g.stabilize_d;
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//target_rate -= constrain(d_temp, -500, 500);
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//last_rate = current_rate;
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// D term
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int16_t d_temp = (rate_d1 + rate_d2 + rate_d3) * g.stabilize_d;
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2012-02-23 13:14:27 -04:00
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d_temp = constrain(d_temp, -400, 400);
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2012-02-17 02:38:23 -04:00
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target_rate -= d_temp;
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2011-12-11 03:25:52 -04:00
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2011-11-05 01:31:30 -03:00
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// output control:
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2012-01-29 02:00:05 -04:00
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return constrain(target_rate, -2500, 2500);
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}
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static int
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get_rate_yaw(int32_t target_rate)
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{
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// rate control
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target_rate = target_rate - (omega.z * DEGX100);
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target_rate = g.pid_rate_yaw.get_pid(target_rate, G_Dt);
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2011-11-07 02:45:07 -04:00
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2011-07-10 21:47:08 -03:00
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// output control:
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2012-01-29 02:00:05 -04:00
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int16_t yaw_limit = 1400 + abs(g.rc_4.control_in);
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2011-12-08 09:23:50 -04:00
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2012-01-29 02:00:05 -04:00
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// smoother Yaw control:
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return constrain(target_rate, -yaw_limit, yaw_limit);
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2010-12-19 12:40:33 -04:00
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}
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2011-12-05 00:51:34 -04:00
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static int16_t
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2011-11-07 18:24:32 -04:00
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get_nav_throttle(int32_t z_error)
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2011-09-04 21:15:36 -03:00
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{
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2011-12-23 18:22:11 -04:00
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static int16_t old_output = 0;
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2012-01-29 02:00:05 -04:00
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int16_t rate_error = 0;
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int16_t output = 0;
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2011-12-05 00:51:34 -04:00
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2011-12-07 01:03:56 -04:00
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// convert to desired Rate:
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2012-01-29 21:08:34 -04:00
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rate_error = g.pi_alt_hold.get_p(z_error);
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rate_error = constrain(rate_error, -100, 100);
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// limit error to prevent I term wind up
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z_error = constrain(z_error, -400, 400);
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2011-12-05 00:51:34 -04:00
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2012-01-20 14:07:38 -04:00
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// compensates throttle setpoint error for hovering
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2012-01-11 03:32:37 -04:00
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int16_t iterm = g.pi_alt_hold.get_i(z_error, .1);
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2011-12-05 00:51:34 -04:00
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// calculate rate error
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2011-11-05 01:41:51 -03:00
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rate_error = rate_error - climb_rate;
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2011-09-04 21:15:36 -03:00
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2012-01-29 02:00:05 -04:00
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// limit the rate
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output = constrain(g.pid_throttle.get_pid(rate_error, .1), -160, 180);
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2012-01-13 02:28:12 -04:00
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2011-12-23 18:22:11 -04:00
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// light filter of output
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2012-01-22 02:04:54 -04:00
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output = (old_output + output) / 2;
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2011-12-23 18:22:11 -04:00
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// save our output
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old_output = output;
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2011-12-05 00:51:34 -04:00
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// output control:
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2011-12-23 18:22:11 -04:00
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return output + iterm;
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2011-09-04 21:15:36 -03:00
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}
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2012-01-03 14:32:16 -04:00
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// Keeps old data out of our calculation / logs
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2012-01-20 14:07:38 -04:00
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static void reset_nav_params(void)
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2011-09-04 22:30:31 -03:00
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{
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2012-01-09 20:57:57 -04:00
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// forces us to update nav throttle
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2011-11-13 01:39:00 -04:00
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invalid_throttle = true;
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2012-01-03 14:32:16 -04:00
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nav_throttle = 0;
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2012-01-09 20:57:57 -04:00
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// always start Circle mode at same angle
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2011-11-13 01:39:00 -04:00
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circle_angle = 0;
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2012-01-09 20:57:57 -04:00
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// We must be heading to a new WP, so XTrack must be 0
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2011-11-13 01:39:00 -04:00
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crosstrack_error = 0;
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2012-01-09 20:57:57 -04:00
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// Will be set by new command
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2011-11-13 01:39:00 -04:00
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target_bearing = 0;
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2012-01-09 20:57:57 -04:00
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// Will be set by new command
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2011-11-13 01:39:00 -04:00
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wp_distance = 0;
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2012-01-09 20:57:57 -04:00
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// Will be set by new command, used by loiter
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2011-11-13 01:39:00 -04:00
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long_error = 0;
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lat_error = 0;
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2012-01-09 20:57:57 -04:00
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// Will be set by new command, used by loiter
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next_WP.alt = 0;
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2012-02-19 17:15:40 -04:00
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// We want to by default pass WPs
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slow_wp = false;
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2011-09-04 22:30:31 -03:00
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}
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2012-01-20 14:07:38 -04:00
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/*
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reset all I integrators
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*/
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static void reset_I_all(void)
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2012-01-03 14:32:16 -04:00
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{
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2012-01-20 14:07:38 -04:00
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reset_rate_I();
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reset_stability_I();
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reset_nav_I();
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reset_wind_I();
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reset_throttle_I();
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reset_optflow_I();
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// This is the only place we reset Yaw
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g.pi_stabilize_yaw.reset_I();
|
|
|
|
}
|
2012-01-03 14:32:16 -04:00
|
|
|
|
2012-01-20 14:07:38 -04:00
|
|
|
static void reset_rate_I()
|
|
|
|
{
|
2012-01-29 02:00:05 -04:00
|
|
|
g.pid_rate_roll.reset_I();
|
|
|
|
g.pid_rate_pitch.reset_I();
|
|
|
|
g.pid_rate_yaw.reset_I();
|
2012-01-20 14:07:38 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
static void reset_optflow_I(void)
|
|
|
|
{
|
2012-01-29 02:00:05 -04:00
|
|
|
g.pid_optflow_roll.reset_I();
|
|
|
|
g.pid_optflow_pitch.reset_I();
|
2012-01-25 08:55:14 -04:00
|
|
|
of_roll = 0;
|
|
|
|
of_pitch = 0;
|
2012-01-03 14:32:16 -04:00
|
|
|
}
|
|
|
|
|
2012-01-20 14:07:38 -04:00
|
|
|
static void reset_wind_I(void)
|
|
|
|
{
|
|
|
|
// Wind Compensation
|
|
|
|
g.pi_loiter_lat.reset_I();
|
|
|
|
g.pi_loiter_lon.reset_I();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void reset_nav_I(void)
|
|
|
|
{
|
|
|
|
// Rate control for WP navigation
|
2012-01-29 02:00:05 -04:00
|
|
|
g.pid_nav_lat.reset_I();
|
|
|
|
g.pid_nav_lon.reset_I();
|
2012-01-20 14:07:38 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
static void reset_throttle_I(void)
|
|
|
|
{
|
|
|
|
// For Altitude Hold
|
|
|
|
g.pi_alt_hold.reset_I();
|
2012-01-29 02:00:05 -04:00
|
|
|
g.pid_throttle.reset_I();
|
2012-01-20 14:07:38 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
static void reset_stability_I(void)
|
|
|
|
{
|
|
|
|
// Used to balance a quad
|
|
|
|
// This only needs to be reset during Auto-leveling in flight
|
|
|
|
g.pi_stabilize_roll.reset_I();
|
|
|
|
g.pi_stabilize_pitch.reset_I();
|
|
|
|
}
|
|
|
|
|
2010-12-19 12:40:33 -04:00
|
|
|
|
2011-02-19 22:03:01 -04:00
|
|
|
/*************************************************************
|
|
|
|
throttle control
|
|
|
|
****************************************************************/
|
|
|
|
|
2011-07-17 07:32:00 -03:00
|
|
|
static long
|
2011-07-16 19:12:52 -03:00
|
|
|
get_nav_yaw_offset(int yaw_input, int reset)
|
2011-02-19 22:03:01 -04:00
|
|
|
{
|
2011-11-07 18:24:32 -04:00
|
|
|
int32_t _yaw;
|
2011-02-21 00:30:56 -04:00
|
|
|
|
2011-07-16 19:12:52 -03:00
|
|
|
if(reset == 0){
|
2011-07-10 21:47:08 -03:00
|
|
|
// we are on the ground
|
|
|
|
return dcm.yaw_sensor;
|
2011-02-21 00:30:56 -04:00
|
|
|
|
2011-02-24 01:56:59 -04:00
|
|
|
}else{
|
2011-07-10 21:47:08 -03:00
|
|
|
// re-define nav_yaw if we have stick input
|
|
|
|
if(yaw_input != 0){
|
|
|
|
// set nav_yaw + or - the current location
|
2011-11-07 18:24:32 -04:00
|
|
|
_yaw = yaw_input + dcm.yaw_sensor;
|
2011-07-10 21:47:08 -03:00
|
|
|
// we need to wrap our value so we can be 0 to 360 (*100)
|
|
|
|
return wrap_360(_yaw);
|
2011-07-30 17:42:54 -03:00
|
|
|
|
2011-07-10 21:47:08 -03:00
|
|
|
}else{
|
2011-07-30 17:42:54 -03:00
|
|
|
// no stick input, lets not change nav_yaw
|
2011-07-10 21:47:08 -03:00
|
|
|
return nav_yaw;
|
|
|
|
}
|
2011-02-19 22:03:01 -04:00
|
|
|
}
|
|
|
|
}
|
2011-09-04 21:15:36 -03:00
|
|
|
|
2011-11-02 01:18:47 -03:00
|
|
|
static int get_angle_boost(int value)
|
2011-07-10 21:47:08 -03:00
|
|
|
{
|
2011-11-02 01:18:47 -03:00
|
|
|
float temp = cos_pitch_x * cos_roll_x;
|
|
|
|
temp = 1.0 - constrain(temp, .5, 1.0);
|
2012-01-21 15:57:42 -04:00
|
|
|
int16_t output = temp * value;
|
2012-01-29 02:00:05 -04:00
|
|
|
return constrain(output, 0, 200);
|
2012-01-21 15:57:42 -04:00
|
|
|
// return (int)(temp * value);
|
2011-11-02 01:18:47 -03:00
|
|
|
}
|
2011-10-02 15:36:23 -03:00
|
|
|
|
2011-12-23 18:22:11 -04:00
|
|
|
#define NUM_G_SAMPLES 40
|
|
|
|
|
|
|
|
#if ACCEL_ALT_HOLD == 2
|
|
|
|
// z -14.4306 = going up
|
|
|
|
// z -6.4306 = going down
|
|
|
|
static int get_z_damping()
|
|
|
|
{
|
|
|
|
int output;
|
|
|
|
|
|
|
|
Z_integrator += get_world_Z_accel() - Z_offset;
|
|
|
|
output = Z_integrator * 3;
|
|
|
|
Z_integrator = Z_integrator * .8;
|
|
|
|
output = constrain(output, -100, 100);
|
|
|
|
return output;
|
|
|
|
}
|
|
|
|
|
|
|
|
float get_world_Z_accel()
|
|
|
|
{
|
|
|
|
accels_rot = dcm.get_dcm_matrix() * imu.get_accel();
|
|
|
|
//Serial.printf("z %1.4f\n", accels_rot.z);
|
|
|
|
return accels_rot.z;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void init_z_damper()
|
|
|
|
{
|
|
|
|
Z_offset = 0;
|
|
|
|
for (int i = 0; i < NUM_G_SAMPLES; i++){
|
|
|
|
delay(5);
|
|
|
|
read_AHRS();
|
|
|
|
Z_offset += get_world_Z_accel();
|
|
|
|
}
|
|
|
|
Z_offset /= (float)NUM_G_SAMPLES;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2011-11-02 01:18:47 -03:00
|
|
|
// Accelerometer Z dampening by Aurelio R. Ramos
|
|
|
|
// ---------------------------------------------
|
2011-12-23 18:22:11 -04:00
|
|
|
#elif ACCEL_ALT_HOLD == 1
|
2011-10-02 15:36:23 -03:00
|
|
|
|
2011-11-02 01:18:47 -03:00
|
|
|
// contains G and any other DC offset
|
|
|
|
static float estimatedAccelOffset = 0;
|
2011-10-02 15:36:23 -03:00
|
|
|
|
2011-11-02 01:18:47 -03:00
|
|
|
// state
|
|
|
|
static float synVelo = 0;
|
|
|
|
static float synPos = 0;
|
|
|
|
static float synPosFiltered = 0;
|
|
|
|
static float posError = 0;
|
|
|
|
static float prevSensedPos = 0;
|
2011-10-02 15:36:23 -03:00
|
|
|
|
2011-11-02 01:18:47 -03:00
|
|
|
// tuning for dead reckoning
|
2011-11-07 02:45:07 -04:00
|
|
|
static const float dt_50hz = 0.02;
|
|
|
|
static float synPosP = 10 * dt_50hz;
|
|
|
|
static float synPosI = 15 * dt_50hz;
|
|
|
|
static float synVeloP = 1.5 * dt_50hz;
|
|
|
|
static float maxVeloCorrection = 5 * dt_50hz;
|
2011-11-02 01:18:47 -03:00
|
|
|
static float maxSensedVelo = 1;
|
2011-11-07 02:45:07 -04:00
|
|
|
static float synPosFilter = 0.5;
|
2011-11-02 01:18:47 -03:00
|
|
|
|
|
|
|
|
|
|
|
// Z damping term.
|
2011-11-07 02:45:07 -04:00
|
|
|
static float fullDampP = 0.100;
|
2011-11-02 01:18:47 -03:00
|
|
|
|
|
|
|
float get_world_Z_accel()
|
|
|
|
{
|
2011-12-23 18:22:11 -04:00
|
|
|
accels_rot = dcm.get_dcm_matrix() * imu.get_accel();
|
2011-11-02 01:18:47 -03:00
|
|
|
return accels_rot.z;
|
2011-09-04 21:15:36 -03:00
|
|
|
}
|
2011-07-10 21:47:08 -03:00
|
|
|
|
2011-11-02 01:18:47 -03:00
|
|
|
static void init_z_damper()
|
2011-02-19 22:03:01 -04:00
|
|
|
{
|
2011-11-02 01:18:47 -03:00
|
|
|
estimatedAccelOffset = 0;
|
|
|
|
for (int i = 0; i < NUM_G_SAMPLES; i++){
|
2011-12-23 18:22:11 -04:00
|
|
|
delay(5);
|
|
|
|
read_AHRS();
|
2011-11-02 01:18:47 -03:00
|
|
|
estimatedAccelOffset += get_world_Z_accel();
|
|
|
|
}
|
|
|
|
estimatedAccelOffset /= (float)NUM_G_SAMPLES;
|
|
|
|
}
|
|
|
|
|
|
|
|
float dead_reckon_Z(float sensedPos, float sensedAccel)
|
|
|
|
{
|
|
|
|
// the following algorithm synthesizes position and velocity from
|
|
|
|
// a noisy altitude and accelerometer data.
|
|
|
|
|
|
|
|
// synthesize uncorrected velocity by integrating acceleration
|
2011-11-07 02:45:07 -04:00
|
|
|
synVelo += (sensedAccel - estimatedAccelOffset) * dt_50hz;
|
2011-11-02 01:18:47 -03:00
|
|
|
|
|
|
|
// synthesize uncorrected position by integrating uncorrected velocity
|
2011-11-07 02:45:07 -04:00
|
|
|
synPos += synVelo * dt_50hz;
|
2011-11-02 01:18:47 -03:00
|
|
|
|
|
|
|
// filter synPos, the better this filter matches the filtering and dead time
|
|
|
|
// of the sensed position, the less the position estimate will lag.
|
|
|
|
synPosFiltered = synPosFiltered * (1 - synPosFilter) + synPos * synPosFilter;
|
|
|
|
|
|
|
|
// calculate error against sensor position
|
|
|
|
posError = sensedPos - synPosFiltered;
|
|
|
|
|
|
|
|
// correct altitude
|
|
|
|
synPos += synPosP * posError;
|
|
|
|
|
|
|
|
// correct integrated velocity by posError
|
|
|
|
synVelo = synVelo + constrain(posError, -maxVeloCorrection, maxVeloCorrection) * synPosI;
|
|
|
|
|
|
|
|
// correct integrated velocity by the sensed position delta in a small proportion
|
|
|
|
// (i.e., the low frequency of the delta)
|
2011-11-07 02:45:07 -04:00
|
|
|
float sensedVelo = (sensedPos - prevSensedPos) / dt_50hz;
|
2011-11-02 01:18:47 -03:00
|
|
|
synVelo += constrain(sensedVelo - synVelo, -maxSensedVelo, maxSensedVelo) * synVeloP;
|
|
|
|
|
|
|
|
prevSensedPos = sensedPos;
|
|
|
|
return synVelo;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int get_z_damping()
|
|
|
|
{
|
|
|
|
float sensedAccel = get_world_Z_accel();
|
|
|
|
float sensedPos = current_loc.alt / 100.0;
|
|
|
|
|
|
|
|
float synVelo = dead_reckon_Z(sensedPos, sensedAccel);
|
|
|
|
return constrain(fullDampP * synVelo * (-1), -300, 300);
|
2011-02-19 22:03:01 -04:00
|
|
|
}
|
|
|
|
|
2011-11-02 01:18:47 -03:00
|
|
|
#else
|
|
|
|
|
|
|
|
static int get_z_damping()
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-12-23 18:22:11 -04:00
|
|
|
static void init_z_damper()
|
|
|
|
{
|
|
|
|
}
|
2012-01-09 00:53:54 -04:00
|
|
|
#endif
|
|
|
|
|
2012-01-25 08:55:14 -04:00
|
|
|
// calculate modified roll/pitch depending upon optical flow calculated position
|
2012-01-09 00:53:54 -04:00
|
|
|
static int32_t
|
|
|
|
get_of_roll(int32_t control_roll)
|
|
|
|
{
|
|
|
|
#ifdef OPTFLOW_ENABLED
|
2012-01-25 08:55:14 -04:00
|
|
|
static float tot_x_cm = 0; // total distance from target
|
2012-01-09 00:53:54 -04:00
|
|
|
static unsigned long last_of_roll_update = 0;
|
2012-01-25 08:55:14 -04:00
|
|
|
int32_t new_roll = 0;
|
2012-01-09 00:53:54 -04:00
|
|
|
|
|
|
|
// check if new optflow data available
|
|
|
|
if( optflow.last_update != last_of_roll_update) {
|
|
|
|
last_of_roll_update = optflow.last_update;
|
|
|
|
|
2012-01-25 08:55:14 -04:00
|
|
|
// add new distance moved
|
|
|
|
tot_x_cm += optflow.x_cm;
|
2012-01-09 00:53:54 -04:00
|
|
|
|
|
|
|
// only stop roll if caller isn't modifying roll
|
|
|
|
if( control_roll == 0 && current_loc.alt < 1500) {
|
2012-01-31 19:04:18 -04:00
|
|
|
new_roll = g.pid_optflow_roll.get_pid(-tot_x_cm, 1.0); // we could use the last update time to calculate the time change
|
2012-01-09 00:53:54 -04:00
|
|
|
}else{
|
2012-01-29 02:00:05 -04:00
|
|
|
g.pid_optflow_roll.reset_I();
|
2012-01-25 08:55:14 -04:00
|
|
|
tot_x_cm = 0;
|
2012-01-09 00:53:54 -04:00
|
|
|
}
|
2012-01-25 08:55:14 -04:00
|
|
|
// limit amount of change and maximum angle
|
|
|
|
of_roll = constrain(new_roll, (of_roll-20), (of_roll+20));
|
2012-01-09 00:53:54 -04:00
|
|
|
}
|
|
|
|
|
2012-01-25 08:55:14 -04:00
|
|
|
// limit max angle
|
|
|
|
of_roll = constrain(of_roll, -1000, 1000);
|
2012-01-09 00:53:54 -04:00
|
|
|
return control_roll+of_roll;
|
|
|
|
#else
|
|
|
|
return control_roll;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
static int32_t
|
|
|
|
get_of_pitch(int32_t control_pitch)
|
|
|
|
{
|
|
|
|
#ifdef OPTFLOW_ENABLED
|
2012-01-25 08:55:14 -04:00
|
|
|
static float tot_y_cm = 0; // total distance from target
|
2012-01-09 00:53:54 -04:00
|
|
|
static unsigned long last_of_pitch_update = 0;
|
2012-01-25 08:55:14 -04:00
|
|
|
int32_t new_pitch = 0;
|
2012-01-09 00:53:54 -04:00
|
|
|
|
|
|
|
// check if new optflow data available
|
|
|
|
if( optflow.last_update != last_of_pitch_update ) {
|
|
|
|
last_of_pitch_update = optflow.last_update;
|
|
|
|
|
2012-01-25 08:55:14 -04:00
|
|
|
// add new distance moved
|
|
|
|
tot_y_cm += optflow.y_cm;
|
2012-01-09 00:53:54 -04:00
|
|
|
|
2012-01-25 08:55:14 -04:00
|
|
|
// only stop roll if caller isn't modifying pitch
|
2012-01-09 00:53:54 -04:00
|
|
|
if( control_pitch == 0 && current_loc.alt < 1500 ) {
|
2012-01-31 19:04:18 -04:00
|
|
|
new_pitch = g.pid_optflow_pitch.get_pid(tot_y_cm, 1.0); // we could use the last update time to calculate the time change
|
2012-01-09 00:53:54 -04:00
|
|
|
}else{
|
2012-01-25 08:55:14 -04:00
|
|
|
tot_y_cm = 0;
|
2012-01-29 02:00:05 -04:00
|
|
|
g.pid_optflow_pitch.reset_I();
|
2012-01-09 00:53:54 -04:00
|
|
|
}
|
2012-01-25 08:55:14 -04:00
|
|
|
|
|
|
|
// limit amount of change
|
|
|
|
of_pitch = constrain(new_pitch, (of_pitch-20), (of_pitch+20));
|
2012-01-09 00:53:54 -04:00
|
|
|
}
|
2012-01-25 08:55:14 -04:00
|
|
|
|
|
|
|
// limit max angle
|
2012-01-09 00:53:54 -04:00
|
|
|
of_pitch = constrain(of_pitch, -1000, 1000);
|
|
|
|
return control_pitch+of_pitch;
|
|
|
|
#else
|
|
|
|
return control_pitch;
|
|
|
|
#endif
|
|
|
|
}
|