ardupilot/ArduSub/control_stabilize.cpp

70 lines
2.9 KiB
C++

#include "Sub.h"
// stabilize_init - initialise stabilize controller
bool Sub::stabilize_init()
{
// set target altitude to zero for reporting
pos_control.set_alt_target(0);
last_pilot_heading = ahrs.yaw_sensor;
return true;
}
// stabilize_run - runs the main stabilize controller
// should be called at 100hz or more
void Sub::stabilize_run()
{
uint32_t tnow = AP_HAL::millis();
float target_roll, target_pitch;
float target_yaw_rate;
// if not armed set throttle to zero and exit immediately
if (!motors.armed()) {
motors.set_desired_spool_state(AP_Motors::DESIRED_SPIN_WHEN_ARMED);
attitude_control.set_throttle_out_unstabilized(0,true,g.throttle_filt);
last_pilot_heading = ahrs.yaw_sensor;
return;
}
motors.set_desired_spool_state(AP_Motors::DESIRED_THROTTLE_UNLIMITED);
// convert pilot input to lean angles
// To-Do: convert get_pilot_desired_lean_angles to return angles as floats
get_pilot_desired_lean_angles(channel_roll->get_control_in(), channel_pitch->get_control_in(), target_roll, target_pitch, aparm.angle_max);
// get pilot's desired yaw rate
target_yaw_rate = get_pilot_desired_yaw_rate(channel_yaw->get_control_in());
// call attitude controller
// update attitude controller targets
if (!is_zero(target_yaw_rate)) { // call attitude controller with rate yaw determined by pilot input
attitude_control.input_euler_angle_roll_pitch_euler_rate_yaw(target_roll, target_pitch, target_yaw_rate, get_smoothing_gain());
last_pilot_heading = ahrs.yaw_sensor;
last_pilot_yaw_input_ms = tnow; // time when pilot last changed heading
} else { // hold current heading
// this check is required to prevent bounce back after very fast yaw maneuvers
// the inertia of the vehicle causes the heading to move slightly past the point when pilot input actually stopped
if (tnow < last_pilot_yaw_input_ms + 250) { // give 250ms to slow down, then set target heading
target_yaw_rate = 0; // Stop rotation on yaw axis
// call attitude controller with target yaw rate = 0 to decelerate on yaw axis
attitude_control.input_euler_angle_roll_pitch_euler_rate_yaw(target_roll, target_pitch, target_yaw_rate, get_smoothing_gain());
last_pilot_heading = ahrs.yaw_sensor; // update heading to hold
} else { // call attitude controller holding absolute absolute bearing
attitude_control.input_euler_angle_roll_pitch_yaw(target_roll, target_pitch, last_pilot_heading, true, get_smoothing_gain());
}
}
// output pilot's throttle
attitude_control.set_throttle_out(channel_throttle->norm_input(), false, g.throttle_filt);
//control_in is range -1000-1000
//radio_in is raw pwm value
motors.set_forward(channel_forward->norm_input());
motors.set_lateral(channel_lateral->norm_input());
}