/* $Id$
*
* This file is a part of jPapaBench providing a Java implementation
* of PapaBench project.
* Copyright (C) 2010 Michal Malohlava <michal.malohlava_at_d3s.mff.cuni.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
package papabench.core.autopilot.tasks.pids;
import papabench.core.autopilot.modules.AutopilotStatus;
import papabench.core.autopilot.modules.Estimator;
import papabench.core.autopilot.modules.Navigator;
import papabench.core.utils.PPRZUtils;
/**
* Computes desired_aileron and desired_elevator from attitude estimation and expected attitude.
*
* @author Michal Malohlava
*
*/
public class RollPitchPIDController extends AbstractPIDController {
public void control(AutopilotStatus status, Estimator estimator, Navigator navigator) {
float err = estimator.getAttitude().phi - status.getRoll();
int desiredAileron = (int) PPRZUtils.trimPPRZ(status.getRollPGain() * err);
if (status.getPitchOfRoll() < 0f) {
status.setPitchOfRoll(0f);
}
err = -(estimator.getAttitude().theta - status.getPitch() - status.getPitchOfRoll() * Math.abs(estimator.getAttitude().phi));
int desiredElevator = (int) PPRZUtils.trimPPRZ(status.getPitchPGain() * err);
status.setAileron(desiredAileron);
status.setElevator(desiredElevator);
}
}