00001 /* +---------------------------------------------------------------------------+ 00002 | The Mobile Robot Programming Toolkit (MRPT) C++ library | 00003 | | 00004 | http://www.mrpt.org/ | 00005 | | 00006 | Copyright (C) 2005-2011 University of Malaga | 00007 | | 00008 | This software was written by the Machine Perception and Intelligent | 00009 | Robotics Lab, University of Malaga (Spain). | 00010 | Contact: Jose-Luis Blanco <jlblanco@ctima.uma.es> | 00011 | | 00012 | This file is part of the MRPT project. | 00013 | | 00014 | MRPT is free software: you can redistribute it and/or modify | 00015 | it under the terms of the GNU General Public License as published by | 00016 | the Free Software Foundation, either version 3 of the License, or | 00017 | (at your option) any later version. | 00018 | | 00019 | MRPT is distributed in the hope that it will be useful, | 00020 | but WITHOUT ANY WARRANTY; without even the implied warranty of | 00021 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | 00022 | GNU General Public License for more details. | 00023 | | 00024 | You should have received a copy of the GNU General Public License | 00025 | along with MRPT. If not, see <http://www.gnu.org/licenses/>. | 00026 | | 00027 +---------------------------------------------------------------------------+ */ 00028 #ifndef CRobotSimulator_H 00029 #define CRobotSimulator_H 00030 00031 #include <mrpt/utils/CSerializable.h> 00032 #include <mrpt/poses/CPose2D.h> 00033 00034 #include <mrpt/base/link_pragmas.h> 00035 00036 namespace mrpt 00037 { 00038 namespace utils 00039 { 00040 using namespace mrpt::poses; 00041 using namespace mrpt::math; 00042 00043 /** This class can be used to simulate the kinematics and dynamics of a differential driven planar mobile robot, including odometry errors and dynamics limitations. 00044 * The main methods are: 00045 - movementCommand: Call this for send a command to the robot. This comamnd will be 00046 delayed and passed throught a first order low-pass filter to simulate 00047 robot dynamics. 00048 - simulateInterval: Call this for run the simulator for the desired time period. 00049 * 00050 Versions: 00051 - 23/MAR/2009: (JLBC) Changed to reuse MRPT poses and methods renamed to conform to MRPT style. 00052 - 29/AUG/2008: (JLBC) Added parameters for odometry noise. 00053 - 27/JAN/2008: (JLBC) Translated to English!!! :-) 00054 - 17/OCT/2005: (JLBC) Integration into the MRML library. 00055 - 1/DIC/2004: (JLBC) Odometry, cumulative errors added. 00056 - 18/JUN/2004: (JLBC) First creation. 00057 * 00058 * \ingroup mrpt_base_grp 00059 */ 00060 class BASE_IMPEXP CRobotSimulator 00061 { 00062 private: 00063 // Internal state variables: 00064 // --------------------------------------- 00065 mrpt::poses::CPose2D m_pose; //!< Global, absolute and error-free robot coordinates 00066 mrpt::poses::CPose2D m_odometry; //!< Used to simulate odometry (with optional error) 00067 00068 /** Instantaneous velocity of the robot (linear, m/s) 00069 */ 00070 double v; 00071 00072 /** Instantaneous velocity of the robot (angular, rad/s) 00073 */ 00074 double w; 00075 00076 /** Simulation time variable 00077 */ 00078 double t; 00079 00080 /** Whether to corrupt odometry with noise */ 00081 bool usar_error_odometrico; 00082 00083 /** Dynamic limitations of the robot. 00084 * Approximation to non-infinity motor forces: A first order low-pass filter, using: 00085 * Command_Time: Time "t" when the last order was received. 00086 * Command_v, Command_w: The user-desired velocities. 00087 * Command_v0, Command_w0: Actual robot velocities at the moment of user request. 00088 */ 00089 double Command_Time, 00090 Command_v, Command_w, 00091 Command_v0, Command_w0; 00092 00093 /** The time-constants for the first order low-pass filter for the velocities changes. */ 00094 float cTAU; // 1.8 sec 00095 00096 /** The delay constant for the velocities changes. */ 00097 float cDELAY; 00098 00099 double m_Ax_err_bias, m_Ax_err_std; 00100 double m_Ay_err_bias, m_Ay_err_std; 00101 double m_Aphi_err_bias, m_Aphi_err_std; 00102 00103 public: 00104 /** Constructor with default dynamic model-parameters 00105 */ 00106 CRobotSimulator( float TAU = 0, float DELAY = 0); 00107 00108 /** Destructor 00109 */ 00110 virtual ~CRobotSimulator(); 00111 00112 /** Change the model of delays used for the orders sent to the robot \sa movementCommand */ 00113 void setDelayModelParams(float TAU_delay_sec=1.8f, float CMD_delay_sec=0.3f) { 00114 cTAU = TAU_delay_sec; 00115 cDELAY = CMD_delay_sec; 00116 } 00117 00118 /** Enable/Disable odometry errors 00119 * Errors in odometry are introduced per millisecond. 00120 */ 00121 void setOdometryErrors( 00122 bool enabled, 00123 double Ax_err_bias = 1e-6, 00124 double Ax_err_std = 10e-6, 00125 double Ay_err_bias = 1e-6, 00126 double Ay_err_std = 10e-6, 00127 double Aphi_err_bias = DEG2RAD(1e-6), 00128 double Aphi_err_std = DEG2RAD(10e-6) 00129 ) 00130 { 00131 usar_error_odometrico=enabled; 00132 m_Ax_err_bias=Ax_err_bias; 00133 m_Ax_err_std=Ax_err_std; 00134 m_Ay_err_bias=Ay_err_bias; 00135 m_Ay_err_std=Ay_err_std; 00136 m_Aphi_err_bias=Aphi_err_bias; 00137 m_Aphi_err_std=Aphi_err_std; 00138 } 00139 00140 /** Reset actual robot pose (inmediately, without simulating the movement along time) 00141 */ 00142 void setRealPose(mrpt::poses::CPose2D &p ) { this->m_pose = p; } 00143 00144 /** Read the instantaneous, error-free status of the simulated robot 00145 */ 00146 double getX() const { return m_pose.x(); } 00147 00148 /** Read the instantaneous, error-free status of the simulated robot 00149 */ 00150 double getY() { return m_pose.y(); } 00151 00152 /** Read the instantaneous, error-free status of the simulated robot 00153 */ 00154 double getPHI() { return m_pose.phi(); } 00155 00156 /** Read the instantaneous, error-free status of the simulated robot 00157 */ 00158 double getT() { return t; } 00159 00160 /** Read the instantaneous, error-free status of the simulated robot 00161 */ 00162 double getV() { return v; } 00163 /** Read the instantaneous, error-free status of the simulated robot 00164 */ 00165 double getW() { return w; } 00166 00167 /** Set actual robot pose (inmediately, without simulating the movement along time) (Not to be called normally!!) 00168 * \sa MovementCommand 00169 */ 00170 void setV(double v) { this->v=v; } 00171 void setW(double w) { this->w=w; } 00172 00173 /** Used to command the robot a desired movement (velocities) 00174 */ 00175 void movementCommand ( double lin_vel, double ang_vel ); 00176 00177 /** Reset all the simulator variables to 0 (All but current simulator time). 00178 */ 00179 void resetStatus(); 00180 00181 /** Reset time counter 00182 */ 00183 void resetTime() { t = 0.0; } 00184 00185 /** This method must be called periodically to simulate discrete time intervals. 00186 */ 00187 void simulateInterval( double At); 00188 00189 /** Forces odometry to be set to a specified values. 00190 */ 00191 void resetOdometry( const mrpt::poses::CPose2D &newOdo = mrpt::poses::CPose2D() ) { 00192 m_odometry = newOdo; 00193 } 00194 00195 /** Reads the simulated robot odometry (this is NOT equal to the actual error-free robot coordinates). 00196 * \sa getRealPose 00197 */ 00198 void getOdometry ( CPose2D &pose ) const { 00199 pose = m_odometry; 00200 } 00201 00202 /** Reads the simulated robot odometry (this is NOT equal to the actual error-free robot coordinates). 00203 * \sa getRealPose 00204 */ 00205 void getOdometry ( TPose2D &pose ) const { 00206 pose = m_odometry; 00207 } 00208 00209 /** Reads the real robot pose. \sa getOdometry */ 00210 void getRealPose ( CPose2D &pose ) const { 00211 pose = m_pose; 00212 } 00213 00214 /** Reads the real robot pose. \sa getOdometry */ 00215 void getRealPose ( TPose2D &pose ) const { 00216 pose = m_pose; 00217 } 00218 }; 00219 00220 } // End of namespace 00221 } // End of namespace 00222 00223 #endif
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