Ejemplo n.º 1
0
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();
	}
}
Ejemplo n.º 2
0
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 */
	}
}
Ejemplo n.º 3
0
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);
	}
}
Ejemplo n.º 4
0
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);
	}
}