/**************************************************************************** * * Copyright (c) 2013, 2014 PX4 Development Team. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name PX4 nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /** * @file mc_att_control_main.cpp * Multicopter attitude controller. * * @author Tobias Naegeli * @author Lorenz Meier * @author Anton Babushkin * @author Thomas Gubler * @author Julian Oes * @author Roman Bapst * * The controller has two loops: P loop for angular error and PD loop for angular rate error. * Desired rotation calculated keeping in mind that yaw response is normally slower than roll/pitch. * For small deviations controller rotates copter to have shortest path of thrust vector and independently rotates around yaw, * so actual rotation axis is not constant. For large deviations controller rotates copter around fixed axis. * These two approaches fused seamlessly with weight depending on angular error. * When thrust vector directed near-horizontally (e.g. roll ~= PI/2) yaw setpoint ignored because of singularity. * Controller doesn't use Euler angles for work, they generated only for more human-friendly control and logging. * If rotation matrix setpoint is invalid it will be generated from Euler angles for compatibility with old position controllers. */ #include "mc_att_control.h" bool thread_running = false; /**< Deamon status flag */ int main(int argc, char **argv) { px4::init(argc, argv, "mc_att_control_m"); PX4_INFO("starting"); MulticopterAttitudeControl attctl; thread_running = true; attctl.spin(); PX4_INFO("exiting."); thread_running = false; return 0; }