void
MulticopterPositionControl::control_offboard(float dt)
{
bool updated;
orb_check(_pos_sp_triplet_sub, &updated);
if (updated) {
orb_copy(ORB_ID(position_setpoint_triplet), _pos_sp_triplet_sub, &_pos_sp_triplet);
}
if (_pos_sp_triplet.current.valid) {
if (_control_mode.flag_control_position_enabled && _pos_sp_triplet.current.position_valid) {
/* control position */
_pos_sp(0) = _pos_sp_triplet.current.x;
_pos_sp(1) = _pos_sp_triplet.current.y;
} else if (_control_mode.flag_control_velocity_enabled && _pos_sp_triplet.current.velocity_valid) {
/* control velocity */
/* reset position setpoint to current position if needed */
reset_pos_sp();
/* set position setpoint move rate */
_sp_move_rate(0) = _pos_sp_triplet.current.vx;
_sp_move_rate(1) = _pos_sp_triplet.current.vy;
}
if (_pos_sp_triplet.current.yaw_valid) {
_att_sp.yaw_body = _pos_sp_triplet.current.yaw;
} else if (_pos_sp_triplet.current.yawspeed_valid) {
_att_sp.yaw_body = _att_sp.yaw_body + _pos_sp_triplet.current.yawspeed * dt;
}
if (_control_mode.flag_control_altitude_enabled && _pos_sp_triplet.current.position_valid) {
/* Control altitude */
_pos_sp(2) = _pos_sp_triplet.current.z;
} else if (_control_mode.flag_control_climb_rate_enabled && _pos_sp_triplet.current.velocity_valid) {
/* reset alt setpoint to current altitude if needed */
reset_alt_sp();
/* set altitude setpoint move rate */
_sp_move_rate(2) = _pos_sp_triplet.current.vz;
}
/* feed forward setpoint move rate with weight vel_ff */
_vel_ff = _sp_move_rate.emult(_params.vel_ff);
/* move position setpoint */
_pos_sp += _sp_move_rate * dt;
} else {
reset_pos_sp();
reset_alt_sp();
}
}
void MulticopterPositionControl::control_auto(float dt)
{
if (!_mode_auto) {
_mode_auto = true;
/* reset position setpoint on AUTO mode activation */
reset_pos_sp();
reset_alt_sp();
}
//Poll position setpoint
bool updated;
orb_check(_pos_sp_triplet_sub, &updated);
if (updated) {
orb_copy(ORB_ID(position_setpoint_triplet), _pos_sp_triplet_sub, &_pos_sp_triplet);
//Make sure that the position setpoint is valid
if (!isfinite(_pos_sp_triplet.current.lat) ||
!isfinite(_pos_sp_triplet.current.lon) ||
!isfinite(_pos_sp_triplet.current.alt)) {
_pos_sp_triplet.current.valid = false;
}
}
if (_pos_sp_triplet.current.valid) {
/* in case of interrupted mission don't go to waypoint but stay at current position */
_reset_pos_sp = true;
_reset_alt_sp = true;
/* project setpoint to local frame */
math::Vector<3> curr_sp;
map_projection_project(&_ref_pos,
_pos_sp_triplet.current.lat, _pos_sp_triplet.current.lon,
&curr_sp.data[0], &curr_sp.data[1]);
curr_sp(2) = -(_pos_sp_triplet.current.alt - _ref_alt);
/* scaled space: 1 == position error resulting max allowed speed, L1 = 1 in this space */
math::Vector<3> scale = _params.pos_p.edivide(_params.vel_max); // TODO add mult param here
/* convert current setpoint to scaled space */
math::Vector<3> curr_sp_s = curr_sp.emult(scale);
/* by default use current setpoint as is */
math::Vector<3> pos_sp_s = curr_sp_s;
if (_pos_sp_triplet.current.type == position_setpoint_s::SETPOINT_TYPE_POSITION && _pos_sp_triplet.previous.valid) {
/* follow "previous - current" line */
math::Vector<3> prev_sp;
map_projection_project(&_ref_pos,
_pos_sp_triplet.previous.lat, _pos_sp_triplet.previous.lon,
&prev_sp.data[0], &prev_sp.data[1]);
prev_sp(2) = -(_pos_sp_triplet.previous.alt - _ref_alt);
if ((curr_sp - prev_sp).length() > MIN_DIST) {
/* find X - cross point of L1 sphere and trajectory */
math::Vector<3> pos_s = _pos.emult(scale);
math::Vector<3> prev_sp_s = prev_sp.emult(scale);
math::Vector<3> prev_curr_s = curr_sp_s - prev_sp_s;
math::Vector<3> curr_pos_s = pos_s - curr_sp_s;
float curr_pos_s_len = curr_pos_s.length();
if (curr_pos_s_len < 1.0f) {
/* copter is closer to waypoint than L1 radius */
/* check next waypoint and use it to avoid slowing down when passing via waypoint */
if (_pos_sp_triplet.next.valid) {
math::Vector<3> next_sp;
map_projection_project(&_ref_pos,
_pos_sp_triplet.next.lat, _pos_sp_triplet.next.lon,
&next_sp.data[0], &next_sp.data[1]);
next_sp(2) = -(_pos_sp_triplet.next.alt - _ref_alt);
if ((next_sp - curr_sp).length() > MIN_DIST) {
math::Vector<3> next_sp_s = next_sp.emult(scale);
/* calculate angle prev - curr - next */
math::Vector<3> curr_next_s = next_sp_s - curr_sp_s;
math::Vector<3> prev_curr_s_norm = prev_curr_s.normalized();
/* cos(a) * curr_next, a = angle between current and next trajectory segments */
float cos_a_curr_next = prev_curr_s_norm * curr_next_s;
/* cos(b), b = angle pos - curr_sp - prev_sp */
float cos_b = -curr_pos_s * prev_curr_s_norm / curr_pos_s_len;
if (cos_a_curr_next > 0.0f && cos_b > 0.0f) {
float curr_next_s_len = curr_next_s.length();
/* if curr - next distance is larger than L1 radius, limit it */
if (curr_next_s_len > 1.0f) {
cos_a_curr_next /= curr_next_s_len;
}
/* feed forward position setpoint offset */
math::Vector<3> pos_ff = prev_curr_s_norm *
cos_a_curr_next * cos_b * cos_b * (1.0f - curr_pos_s_len) *
(1.0f - expf(-curr_pos_s_len * curr_pos_s_len * 20.0f));
pos_sp_s += pos_ff;
}
}
}
} else {
bool near = cross_sphere_line(pos_s, 1.0f, prev_sp_s, curr_sp_s, pos_sp_s);
if (near) {
/* L1 sphere crosses trajectory */
} else {
/* copter is too far from trajectory */
/* if copter is behind prev waypoint, go directly to prev waypoint */
if ((pos_sp_s - prev_sp_s) * prev_curr_s < 0.0f) {
pos_sp_s = prev_sp_s;
}
/* if copter is in front of curr waypoint, go directly to curr waypoint */
if ((pos_sp_s - curr_sp_s) * prev_curr_s > 0.0f) {
pos_sp_s = curr_sp_s;
}
pos_sp_s = pos_s + (pos_sp_s - pos_s).normalized();
}
}
}
}
/* move setpoint not faster than max allowed speed */
math::Vector<3> pos_sp_old_s = _pos_sp.emult(scale);
/* difference between current and desired position setpoints, 1 = max speed */
math::Vector<3> d_pos_m = (pos_sp_s - pos_sp_old_s).edivide(_params.pos_p);
float d_pos_m_len = d_pos_m.length();
if (d_pos_m_len > dt) {
pos_sp_s = pos_sp_old_s + (d_pos_m / d_pos_m_len * dt).emult(_params.pos_p);
}
/* scale result back to normal space */
_pos_sp = pos_sp_s.edivide(scale);
/* update yaw setpoint if needed */
if (isfinite(_pos_sp_triplet.current.yaw)) {
_att_sp.yaw_body = _pos_sp_triplet.current.yaw;
}
} else {
/* no waypoint, do nothing, setpoint was already reset */
}
}
void
MulticopterPositionControl::control_manual(float dt)
{
_sp_move_rate.zero();
if (_control_mode.flag_control_altitude_enabled) {
if(_reset_mission)
{
_reset_mission = false;
_mode_mission = 1 ;
_hover_time = 0.0 ;
}
float height_hover_constant=-1.0;
float hover_time_constant = 20.0;
switch(_mode_mission)
{
case 1:
_sp_move_rate(2) = -0.8;
if(_pos_sp(2)<=height_hover_constant)
_mode_mission=2;
break;
case 2:
_hover_time += dt;
if(_hover_time>hover_time_constant)
{
_hover_time=0.0;
_mode_mission=3;
}
break;
case 3:
_pos_sp_triplet.current.type =position_setpoint_s::SETPOINT_TYPE_LAND;
break;
default:
/* move altitude setpoint with throttle stick */
_sp_move_rate(2) = -scale_control(_manual.z - 0.5f, 0.5f, alt_ctl_dz);
break;
}
}
if (_control_mode.flag_control_position_enabled) {
/* move position setpoint with roll/pitch stick */
_sp_move_rate(0) = _manual.x;
_sp_move_rate(1) = _manual.y;
}
/* limit setpoint move rate */
float sp_move_norm = _sp_move_rate.length();
if (sp_move_norm > 1.0f) {
_sp_move_rate /= sp_move_norm;
}
/* _sp_move_rate scaled to 0..1, scale it to max speed and rotate around yaw */
math::Matrix<3, 3> R_yaw_sp;
R_yaw_sp.from_euler(0.0f, 0.0f, _att_sp.yaw_body);
_sp_move_rate = R_yaw_sp * _sp_move_rate.emult(_params.vel_max);
if (_control_mode.flag_control_altitude_enabled) {
/* reset alt setpoint to current altitude if needed */
reset_alt_sp();
}
if (_control_mode.flag_control_position_enabled) {
/* reset position setpoint to current position if needed */
reset_pos_sp();
}
/* feed forward setpoint move rate with weight vel_ff */
_vel_ff = _sp_move_rate.emult(_params.vel_ff);
/* move position setpoint */
_pos_sp += _sp_move_rate * dt;
/* check if position setpoint is too far from actual position */
math::Vector<3> pos_sp_offs;
pos_sp_offs.zero();
if (_control_mode.flag_control_position_enabled) {
pos_sp_offs(0) = (_pos_sp(0) - _pos(0)) / _params.sp_offs_max(0);
pos_sp_offs(1) = (_pos_sp(1) - _pos(1)) / _params.sp_offs_max(1);
}
if (_control_mode.flag_control_altitude_enabled) {
pos_sp_offs(2) = (_pos_sp(2) - _pos(2)) / _params.sp_offs_max(2);
}
float pos_sp_offs_norm = pos_sp_offs.length();
if (pos_sp_offs_norm > 1.0f) {
pos_sp_offs /= pos_sp_offs_norm;
_pos_sp = _pos + pos_sp_offs.emult(_params.sp_offs_max);
}
}
void
MulticopterPositionControl::control_manual(float dt)
{
_sp_move_rate.zero();
if (_control_mode.flag_control_altitude_enabled) {
/* move altitude setpoint with throttle stick */
_sp_move_rate(2) = -scale_control(_manual.z - 0.5f, 0.5f, alt_ctl_dz);
}
if (_control_mode.flag_control_position_enabled) {
/* move position setpoint with roll/pitch stick */
_sp_move_rate(0) = _manual.x;
_sp_move_rate(1) = _manual.y;
}
/* limit setpoint move rate */
float sp_move_norm = _sp_move_rate.length();
if (sp_move_norm > 1.0f) {
_sp_move_rate /= sp_move_norm;
}
/* _sp_move_rate scaled to 0..1, scale it to max speed and rotate around yaw */
math::Matrix<3, 3> R_yaw_sp;
R_yaw_sp.from_euler(0.0f, 0.0f, _att_sp.yaw_body);
_sp_move_rate = R_yaw_sp * _sp_move_rate.emult(_params.vel_max);
if (_control_mode.flag_control_altitude_enabled) {
/* reset alt setpoint to current altitude if needed */
reset_alt_sp();
}
if (_control_mode.flag_control_position_enabled) {
/* reset position setpoint to current position if needed */
reset_pos_sp();
}
/* feed forward setpoint move rate with weight vel_ff */
_vel_ff = _sp_move_rate.emult(_params.vel_ff);
/* move position setpoint */
_pos_sp += _sp_move_rate * dt;
/* check if position setpoint is too far from actual position */
math::Vector<3> pos_sp_offs;
pos_sp_offs.zero();
if (_control_mode.flag_control_position_enabled) {
pos_sp_offs(0) = (_pos_sp(0) - _pos(0)) / _params.sp_offs_max(0);
pos_sp_offs(1) = (_pos_sp(1) - _pos(1)) / _params.sp_offs_max(1);
}
if (_control_mode.flag_control_altitude_enabled) {
pos_sp_offs(2) = (_pos_sp(2) - _pos(2)) / _params.sp_offs_max(2);
}
float pos_sp_offs_norm = pos_sp_offs.length();
if (pos_sp_offs_norm > 1.0f) {
pos_sp_offs /= pos_sp_offs_norm;
_pos_sp = _pos + pos_sp_offs.emult(_params.sp_offs_max);
}
}
