ardupilot/ArduSub/control_surface.cpp

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#include "Sub.h"
bool Sub::surface_init()
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{
if(!control_check_barometer()) {
return false;
}
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// initialize vertical speeds and leash lengths
pos_control.set_max_speed_z(wp_nav.get_default_speed_down(), wp_nav.get_default_speed_up());
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pos_control.set_max_accel_z(wp_nav.get_accel_z());
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// initialise position and desired velocity
pos_control.set_alt_target(inertial_nav.get_altitude());
pos_control.set_desired_velocity_z(inertial_nav.get_velocity_z());
return true;
}
void Sub::surface_run()
{
float target_roll, target_pitch;
float target_yaw_rate;
// if not armed set throttle to zero and exit immediately
if (!motors.armed()) {
motors.output_min();
motors.set_desired_spool_state(AP_Motors::DesiredSpoolState::GROUND_IDLE);
attitude_control.set_throttle_out(0,true,g.throttle_filt);
attitude_control.relax_attitude_controllers();
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return;
}
// Already at surface, hold depth at surface
if (ap.at_surface) {
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set_mode(ALT_HOLD, ModeReason::SURFACE_COMPLETE);
}
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// 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
attitude_control.input_euler_angle_roll_pitch_euler_rate_yaw(target_roll, target_pitch, target_yaw_rate);
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// set target climb rate
float cmb_rate = constrain_float(fabsf(wp_nav.get_default_speed_up()), 1, pos_control.get_max_speed_up());
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// record desired climb rate for logging
desired_climb_rate = cmb_rate;
// update altitude target and call position controller
pos_control.set_alt_target_from_climb_rate_ff(cmb_rate, G_Dt, true);
pos_control.update_z_controller();
// pilot has control for repositioning
motors.set_forward(channel_forward->norm_input());
motors.set_lateral(channel_lateral->norm_input());
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}