2015-12-30 18:57:56 -04:00
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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
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2016-01-14 15:30:56 -04:00
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#include "Sub.h"
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2015-12-30 18:57:56 -04:00
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/*
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* control_loiter.pde - init and run calls for loiter flight mode
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*/
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// loiter_init - initialise loiter controller
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2016-01-14 15:30:56 -04:00
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bool Sub::loiter_init(bool ignore_checks)
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2015-12-30 18:57:56 -04:00
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{
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if (position_ok() || ignore_checks) {
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// set target to current position
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wp_nav.init_loiter_target();
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// initialize vertical speed and acceleration
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pos_control.set_speed_z(-g.pilot_velocity_z_max, g.pilot_velocity_z_max);
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pos_control.set_accel_z(g.pilot_accel_z);
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// initialise position and desired velocity
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pos_control.set_alt_target(inertial_nav.get_altitude());
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pos_control.set_desired_velocity_z(inertial_nav.get_velocity_z());
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return true;
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}else{
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return false;
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}
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}
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// loiter_run - runs the loiter controller
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// should be called at 100hz or more
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2016-01-14 15:30:56 -04:00
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void Sub::loiter_run()
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2015-12-30 18:57:56 -04:00
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{
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LoiterModeState loiter_state;
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float target_yaw_rate = 0.0f;
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float target_climb_rate = 0.0f;
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float takeoff_climb_rate = 0.0f;
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// initialize vertical speed and acceleration
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pos_control.set_speed_z(-g.pilot_velocity_z_max, g.pilot_velocity_z_max);
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pos_control.set_accel_z(g.pilot_accel_z);
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// process pilot inputs unless we are in radio failsafe
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if (!failsafe.radio) {
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// apply SIMPLE mode transform to pilot inputs
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update_simple_mode();
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// process pilot's roll and pitch input
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wp_nav.set_pilot_desired_acceleration(channel_roll->control_in, channel_pitch->control_in);
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// get pilot's desired yaw rate
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target_yaw_rate = get_pilot_desired_yaw_rate(channel_yaw->control_in);
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// get pilot desired climb rate
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target_climb_rate = get_pilot_desired_climb_rate(channel_throttle->control_in);
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target_climb_rate = constrain_float(target_climb_rate, -g.pilot_velocity_z_max, g.pilot_velocity_z_max);
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} else {
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// clear out pilot desired acceleration in case radio failsafe event occurs and we do not switch to RTL for some reason
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wp_nav.clear_pilot_desired_acceleration();
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}
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// relax loiter target if we might be landed
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if (ap.land_complete_maybe) {
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wp_nav.loiter_soften_for_landing();
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}
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// Loiter State Machine Determination
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if(!ap.auto_armed) {
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loiter_state = Loiter_Disarmed;
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} else if (!motors.get_interlock()){
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loiter_state = Loiter_MotorStop;
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} else if (takeoff_state.running || (ap.land_complete && (channel_throttle->control_in > get_takeoff_trigger_throttle()))){
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loiter_state = Loiter_Takeoff;
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} else if (ap.land_complete){
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loiter_state = Loiter_Landed;
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} else {
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loiter_state = Loiter_Flying;
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}
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// Loiter State Machine
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switch (loiter_state) {
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case Loiter_Disarmed:
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wp_nav.init_loiter_target();
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2016-04-05 00:17:39 -03:00
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motors.set_desired_spool_state(AP_Motors::DESIRED_SPIN_WHEN_ARMED);
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2016-02-23 02:15:15 -04:00
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// multicopters do not stabilize roll/pitch/yaw when disarmed
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2015-12-30 18:57:56 -04:00
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attitude_control.set_throttle_out_unstabilized(0,true,g.throttle_filt);
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2016-02-23 02:15:15 -04:00
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2015-12-30 18:57:56 -04:00
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pos_control.relax_alt_hold_controllers(get_throttle_pre_takeoff(channel_throttle->control_in)-throttle_average);
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break;
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case Loiter_MotorStop:
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2016-04-05 00:17:39 -03:00
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motors.set_desired_spool_state(AP_Motors::DESIRED_SHUT_DOWN);
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2015-12-30 18:57:56 -04:00
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wp_nav.init_loiter_target();
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// multicopters do not stabilize roll/pitch/yaw when motors are stopped
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attitude_control.set_throttle_out_unstabilized(0,true,g.throttle_filt);
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pos_control.relax_alt_hold_controllers(get_throttle_pre_takeoff(channel_throttle->control_in)-throttle_average);
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break;
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case Loiter_Takeoff:
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if (!takeoff_state.running) {
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takeoff_timer_start(constrain_float(g.pilot_takeoff_alt,0.0f,1000.0f));
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// indicate we are taking off
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set_land_complete(false);
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// clear i term when we're taking off
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set_throttle_takeoff();
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}
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// get takeoff adjusted pilot and takeoff climb rates
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takeoff_get_climb_rates(target_climb_rate, takeoff_climb_rate);
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2016-04-05 00:17:39 -03:00
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// set motors to full range
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motors.set_desired_spool_state(AP_Motors::DESIRED_THROTTLE_UNLIMITED);
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2015-12-30 18:57:56 -04:00
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// run loiter controller
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wp_nav.update_loiter(ekfGndSpdLimit, ekfNavVelGainScaler);
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// call attitude controller
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attitude_control.input_euler_angle_roll_pitch_euler_rate_yaw(wp_nav.get_roll(), wp_nav.get_pitch(), target_yaw_rate);
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// update altitude target and call position controller
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pos_control.set_alt_target_from_climb_rate_ff(target_climb_rate, G_Dt, false);
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pos_control.add_takeoff_climb_rate(takeoff_climb_rate, G_Dt);
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pos_control.update_z_controller();
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break;
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case Loiter_Landed:
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wp_nav.init_loiter_target();
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2016-04-05 00:17:39 -03:00
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// if throttle zero reset attitude and exit immediately
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if (ap.throttle_zero) {
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motors.set_desired_spool_state(AP_Motors::DESIRED_SPIN_WHEN_ARMED);
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}else{
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motors.set_desired_spool_state(AP_Motors::DESIRED_THROTTLE_UNLIMITED);
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}
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2016-02-23 02:15:15 -04:00
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// multicopters do not stabilize roll/pitch/yaw when disarmed
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2016-04-05 00:17:39 -03:00
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attitude_control.set_throttle_out(get_throttle_pre_takeoff(channel_throttle->control_in),false,g.throttle_filt);
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2015-12-30 18:57:56 -04:00
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pos_control.relax_alt_hold_controllers(get_throttle_pre_takeoff(channel_throttle->control_in)-throttle_average);
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break;
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case Loiter_Flying:
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2016-04-05 00:17:39 -03:00
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// set motors to full range
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motors.set_desired_spool_state(AP_Motors::DESIRED_THROTTLE_UNLIMITED);
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2015-12-30 18:57:56 -04:00
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// run loiter controller
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wp_nav.update_loiter(ekfGndSpdLimit, ekfNavVelGainScaler);
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// call attitude controller
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attitude_control.input_euler_angle_roll_pitch_euler_rate_yaw(wp_nav.get_roll(), wp_nav.get_pitch(), target_yaw_rate);
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2016-05-22 21:50:44 -03:00
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// adjust climb rate using rangefinder
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if (rangefinder_alt_ok()) {
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// if rangefinder is ok, use surface tracking
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2015-12-30 18:57:56 -04:00
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target_climb_rate = get_surface_tracking_climb_rate(target_climb_rate, pos_control.get_alt_target(), G_Dt);
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}
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// update altitude target and call position controller
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pos_control.set_alt_target_from_climb_rate_ff(target_climb_rate, G_Dt, false);
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pos_control.update_z_controller();
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break;
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}
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}
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