ardupilot/ArduCopter/mode_acro.cpp

176 lines
7.2 KiB
C++

#include "Copter.h"
#include "mode.h"
#if MODE_ACRO_ENABLED == ENABLED
/*
* Init and run calls for acro flight mode
*/
void ModeAcro::run()
{
// convert the input to the desired body frame rate
float target_roll, target_pitch, target_yaw;
get_pilot_desired_angle_rates(channel_roll->get_control_in(), channel_pitch->get_control_in(), channel_yaw->get_control_in(), target_roll, target_pitch, target_yaw);
if (!motors->armed()) {
// Motors should be Stopped
motors->set_desired_spool_state(AP_Motors::DesiredSpoolState::SHUT_DOWN);
} else if (copter.ap.throttle_zero) {
// Attempting to Land
motors->set_desired_spool_state(AP_Motors::DesiredSpoolState::GROUND_IDLE);
} else {
motors->set_desired_spool_state(AP_Motors::DesiredSpoolState::THROTTLE_UNLIMITED);
}
switch (motors->get_spool_state()) {
case AP_Motors::SpoolState::SHUT_DOWN:
// Motors Stopped
attitude_control->set_attitude_target_to_current_attitude();
attitude_control->reset_rate_controller_I_terms();
break;
case AP_Motors::SpoolState::GROUND_IDLE:
// Landed
attitude_control->set_attitude_target_to_current_attitude();
attitude_control->reset_rate_controller_I_terms();
break;
case AP_Motors::SpoolState::THROTTLE_UNLIMITED:
// clear landing flag above zero throttle
if (!motors->limit.throttle_lower) {
set_land_complete(false);
}
break;
case AP_Motors::SpoolState::SPOOLING_UP:
case AP_Motors::SpoolState::SPOOLING_DOWN:
// do nothing
break;
}
// run attitude controller
attitude_control->input_rate_bf_roll_pitch_yaw(target_roll, target_pitch, target_yaw);
// output pilot's throttle without angle boost
attitude_control->set_throttle_out(get_pilot_desired_throttle(),
false,
copter.g.throttle_filt);
}
// get_pilot_desired_angle_rates - transform pilot's roll pitch and yaw input into a desired lean angle rates
// returns desired angle rates in centi-degrees-per-second
void ModeAcro::get_pilot_desired_angle_rates(int16_t roll_in, int16_t pitch_in, int16_t yaw_in, float &roll_out, float &pitch_out, float &yaw_out)
{
float rate_limit;
Vector3f rate_ef_level, rate_bf_level, rate_bf_request;
// apply circular limit to pitch and roll inputs
float total_in = norm(pitch_in, roll_in);
if (total_in > ROLL_PITCH_YAW_INPUT_MAX) {
float ratio = (float)ROLL_PITCH_YAW_INPUT_MAX / total_in;
roll_in *= ratio;
pitch_in *= ratio;
}
// calculate roll, pitch rate requests
if (g.acro_rp_expo <= 0) {
rate_bf_request.x = roll_in * g.acro_rp_p;
rate_bf_request.y = pitch_in * g.acro_rp_p;
} else {
// expo variables
float rp_in, rp_in3, rp_out;
// range check expo
if (g.acro_rp_expo > 1.0f) {
g.acro_rp_expo = 1.0f;
}
// roll expo
rp_in = float(roll_in)/ROLL_PITCH_YAW_INPUT_MAX;
rp_in3 = rp_in*rp_in*rp_in;
rp_out = (g.acro_rp_expo * rp_in3) + ((1.0f - g.acro_rp_expo) * rp_in);
rate_bf_request.x = ROLL_PITCH_YAW_INPUT_MAX * rp_out * g.acro_rp_p;
// pitch expo
rp_in = float(pitch_in)/ROLL_PITCH_YAW_INPUT_MAX;
rp_in3 = rp_in*rp_in*rp_in;
rp_out = (g.acro_rp_expo * rp_in3) + ((1.0f - g.acro_rp_expo) * rp_in);
rate_bf_request.y = ROLL_PITCH_YAW_INPUT_MAX * rp_out * g.acro_rp_p;
}
// calculate yaw rate request
rate_bf_request.z = get_pilot_desired_yaw_rate(yaw_in);
// calculate earth frame rate corrections to pull the copter back to level while in ACRO mode
if (g.acro_trainer != ACRO_TRAINER_DISABLED) {
// get attitude targets
const Vector3f att_target = attitude_control->get_att_target_euler_cd();
// Calculate trainer mode earth frame rate command for roll
int32_t roll_angle = wrap_180_cd(att_target.x);
rate_ef_level.x = -constrain_int32(roll_angle, -ACRO_LEVEL_MAX_ANGLE, ACRO_LEVEL_MAX_ANGLE) * g.acro_balance_roll;
// Calculate trainer mode earth frame rate command for pitch
int32_t pitch_angle = wrap_180_cd(att_target.y);
rate_ef_level.y = -constrain_int32(pitch_angle, -ACRO_LEVEL_MAX_ANGLE, ACRO_LEVEL_MAX_ANGLE) * g.acro_balance_pitch;
// Calculate trainer mode earth frame rate command for yaw
rate_ef_level.z = 0;
// Calculate angle limiting earth frame rate commands
if (g.acro_trainer == ACRO_TRAINER_LIMITED) {
const float angle_max = copter.aparm.angle_max;
if (roll_angle > angle_max){
rate_ef_level.x += AC_AttitudeControl::sqrt_controller(angle_max - roll_angle, g.acro_rp_p * 4.5, attitude_control->get_accel_roll_max(), G_Dt);
}else if (roll_angle < -angle_max) {
rate_ef_level.x += AC_AttitudeControl::sqrt_controller(-angle_max - roll_angle, g.acro_rp_p * 4.5, attitude_control->get_accel_roll_max(), G_Dt);
}
if (pitch_angle > angle_max){
rate_ef_level.y += AC_AttitudeControl::sqrt_controller(angle_max - pitch_angle, g.acro_rp_p * 4.5, attitude_control->get_accel_pitch_max(), G_Dt);
}else if (pitch_angle < -angle_max) {
rate_ef_level.y += AC_AttitudeControl::sqrt_controller(-angle_max - pitch_angle, g.acro_rp_p * 4.5, attitude_control->get_accel_pitch_max(), G_Dt);
}
}
// convert earth-frame level rates to body-frame level rates
attitude_control->euler_rate_to_ang_vel(attitude_control->get_att_target_euler_cd()*radians(0.01f), rate_ef_level, rate_bf_level);
// combine earth frame rate corrections with rate requests
if (g.acro_trainer == ACRO_TRAINER_LIMITED) {
rate_bf_request.x += rate_bf_level.x;
rate_bf_request.y += rate_bf_level.y;
rate_bf_request.z += rate_bf_level.z;
}else{
float acro_level_mix = constrain_float(1-float(MAX(MAX(abs(roll_in), abs(pitch_in)), abs(yaw_in))/4500.0), 0, 1)*ahrs.cos_pitch();
// Scale leveling rates by stick input
rate_bf_level = rate_bf_level*acro_level_mix;
// Calculate rate limit to prevent change of rate through inverted
rate_limit = fabsf(fabsf(rate_bf_request.x)-fabsf(rate_bf_level.x));
rate_bf_request.x += rate_bf_level.x;
rate_bf_request.x = constrain_float(rate_bf_request.x, -rate_limit, rate_limit);
// Calculate rate limit to prevent change of rate through inverted
rate_limit = fabsf(fabsf(rate_bf_request.y)-fabsf(rate_bf_level.y));
rate_bf_request.y += rate_bf_level.y;
rate_bf_request.y = constrain_float(rate_bf_request.y, -rate_limit, rate_limit);
// Calculate rate limit to prevent change of rate through inverted
rate_limit = fabsf(fabsf(rate_bf_request.z)-fabsf(rate_bf_level.z));
rate_bf_request.z += rate_bf_level.z;
rate_bf_request.z = constrain_float(rate_bf_request.z, -rate_limit, rate_limit);
}
}
// hand back rate request
roll_out = rate_bf_request.x;
pitch_out = rate_bf_request.y;
yaw_out = rate_bf_request.z;
}
#endif