00001 /********************************************************************* 00002 * Software License Agreement (BSD License) 00003 * 00004 * Copyright (c) 2010, LABUST, UNIZG-FER 00005 * All rights reserved. 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions 00009 * are met: 00010 * 00011 * * Redistributions of source code must retain the above copyright 00012 * notice, this list of conditions and the following disclaimer. 00013 * * Redistributions in binary form must reproduce the above 00014 * copyright notice, this list of conditions and the following 00015 * disclaimer in the documentation and/or other materials provided 00016 * with the distribution. 00017 * * Neither the name of the LABUST nor the names of its 00018 * contributors may be used to endorse or promote products derived 00019 * from this software without specific prior written permission. 00020 * 00021 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00022 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00023 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00024 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 00025 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00026 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00027 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 00028 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 00029 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00030 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 00031 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00032 * POSSIBILITY OF SUCH DAMAGE. 00033 *********************************************************************/ 00034 #include <labust/control/PIDBase.h> 00035 00036 void PIDBase_init(PIDBase* self) 00037 { 00038 self->autoWindup = 0; 00039 self->useBackward = 1; 00040 self->windup = 0; 00041 self->extWindup = 0; 00042 self->outputLimit = 0; 00043 self->Kp = self->Ki = 0; 00044 self->Kd = self->Tf = 0; 00045 self->Kt = 0; 00046 self->b = 1.0; 00047 00048 self->internalState = self->output = self->I = 0; 00049 self->desired = self->state =0; 00050 self->lastError = self->lastRef = 0; 00051 self->lastFF = self->lastState = 0; 00052 self->lastI = 0; self->track = 0; 00053 self->llastError = self->llastState = 0; 00054 self->lastPError = 0; 00055 00056 self->model.alpha = 0; 00057 self->model.beta = 0; 00058 self->model.betaa = 0; 00059 self->w = 0; 00060 } 00061 00062 float sat(float u, float low, float high) 00063 { 00064 if (u < low) return low; 00065 if (u > high) return high; 00066 return u; 00067 } 00068 00069