Eurobot2012_Primary
Dependencies: mbed Eurobot_2012_Primary
Eurobot_shared/Motion/motion.cpp@14:24f994dc2770, 2012-04-28 (annotated)
- Committer:
- narshu
- Date:
- Sat Apr 28 20:44:09 2012 +0000
- Revision:
- 14:24f994dc2770
- Parent:
- 13:57ea4e520dbd
- Child:
- 15:acae5c0e9ca8
added speed limiter
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
narshu | 13:57ea4e520dbd | 1 | #include "motion.h" |
narshu | 13:57ea4e520dbd | 2 | #include "geometryfuncs.h" |
narshu | 13:57ea4e520dbd | 3 | |
narshu | 13:57ea4e520dbd | 4 | |
narshu | 13:57ea4e520dbd | 5 | Motion::Motion(Motors &motorsin, AI &aiin, Kalman &kalmanin): |
narshu | 13:57ea4e520dbd | 6 | thr_motion(mtwrapper,this,osPriorityNormal,1024), |
narshu | 13:57ea4e520dbd | 7 | motors(motorsin), |
narshu | 13:57ea4e520dbd | 8 | ai(aiin), |
narshu | 13:57ea4e520dbd | 9 | kalman(kalmanin) { } |
narshu | 13:57ea4e520dbd | 10 | |
narshu | 13:57ea4e520dbd | 11 | // motion control thread ------------------------ |
narshu | 13:57ea4e520dbd | 12 | void Motion::motion_thread() { |
narshu | 13:57ea4e520dbd | 13 | motors.resetEncoders(); |
narshu | 13:57ea4e520dbd | 14 | motors.stop(); |
narshu | 13:57ea4e520dbd | 15 | Thread::wait(1500); |
narshu | 13:57ea4e520dbd | 16 | ai.thr_AI.signal_set(0x01); |
narshu | 13:57ea4e520dbd | 17 | |
narshu | 13:57ea4e520dbd | 18 | //PID declare |
narshu | 13:57ea4e520dbd | 19 | PID PIDControllerMotorTheta2(FWD_MOVE_P, 0, 0, MOTION_UPDATE_PERIOD/1000.0f); //Going forward |
narshu | 13:57ea4e520dbd | 20 | PID PIDControllerMotorTheta(SPIN_MOVE_P, 0, 0, MOTION_UPDATE_PERIOD/1000.0f); //Spinning on the spot |
narshu | 13:57ea4e520dbd | 21 | |
narshu | 13:57ea4e520dbd | 22 | //PID Initialisation |
narshu | 13:57ea4e520dbd | 23 | PIDControllerMotorTheta2.setMode(MANUAL_MODE); |
narshu | 13:57ea4e520dbd | 24 | PIDControllerMotorTheta.setMode(MANUAL_MODE); |
narshu | 13:57ea4e520dbd | 25 | |
narshu | 13:57ea4e520dbd | 26 | PIDControllerMotorTheta2.setBias(0); |
narshu | 13:57ea4e520dbd | 27 | PIDControllerMotorTheta.setBias(0); |
narshu | 13:57ea4e520dbd | 28 | |
narshu | 13:57ea4e520dbd | 29 | PIDControllerMotorTheta2.setOutputLimits(-1, 1); |
narshu | 13:57ea4e520dbd | 30 | PIDControllerMotorTheta.setOutputLimits(-1, 1); |
narshu | 13:57ea4e520dbd | 31 | |
narshu | 13:57ea4e520dbd | 32 | PIDControllerMotorTheta2.setInputLimits(-PI, PI); |
narshu | 13:57ea4e520dbd | 33 | PIDControllerMotorTheta.setInputLimits(-PI, PI); |
narshu | 13:57ea4e520dbd | 34 | |
narshu | 13:57ea4e520dbd | 35 | PIDControllerMotorTheta.setSetPoint(0); |
narshu | 13:57ea4e520dbd | 36 | PIDControllerMotorTheta2.setSetPoint(0); |
narshu | 13:57ea4e520dbd | 37 | |
narshu | 13:57ea4e520dbd | 38 | float currX, currY,currTheta; |
narshu | 13:57ea4e520dbd | 39 | float speedL,speedR; |
narshu | 13:57ea4e520dbd | 40 | float diffDir; |
narshu | 13:57ea4e520dbd | 41 | |
narshu | 13:57ea4e520dbd | 42 | while (1) { |
narshu | 13:57ea4e520dbd | 43 | if (ai.flag_terminate) { |
narshu | 13:57ea4e520dbd | 44 | terminate(); |
narshu | 13:57ea4e520dbd | 45 | } |
narshu | 13:57ea4e520dbd | 46 | |
narshu | 13:57ea4e520dbd | 47 | // get kalman localization estimate ------------------------ |
narshu | 13:57ea4e520dbd | 48 | kalman.statelock.lock(); |
narshu | 13:57ea4e520dbd | 49 | currX = kalman.X(0)*1000.0f; |
narshu | 13:57ea4e520dbd | 50 | currY = kalman.X(1)*1000.0f; |
narshu | 13:57ea4e520dbd | 51 | currTheta = kalman.X(2); |
narshu | 13:57ea4e520dbd | 52 | kalman.statelock.unlock(); |
narshu | 13:57ea4e520dbd | 53 | |
narshu | 13:57ea4e520dbd | 54 | /* |
narshu | 13:57ea4e520dbd | 55 | //PID Tuning Code |
narshu | 13:57ea4e520dbd | 56 | if (pc.readable() == 1) { |
narshu | 13:57ea4e520dbd | 57 | float cmd; |
narshu | 13:57ea4e520dbd | 58 | pc.scanf("%f", &cmd); |
narshu | 13:57ea4e520dbd | 59 | //Tune PID referece |
narshu | 13:57ea4e520dbd | 60 | PIDControllerMotorTheta2.setTunings(cmd, 0, 0); |
narshu | 13:57ea4e520dbd | 61 | } |
narshu | 13:57ea4e520dbd | 62 | */ |
narshu | 13:57ea4e520dbd | 63 | |
narshu | 13:57ea4e520dbd | 64 | // check if target reached ---------------------------------- |
narshu | 14:24f994dc2770 | 65 | int localtargetnumber = ai.targetnumber; |
narshu | 13:57ea4e520dbd | 66 | if ( ( abs(currX - ai.target.x) < POSITION_TOR ) |
narshu | 13:57ea4e520dbd | 67 | &&( abs(currY - ai.target.y) < POSITION_TOR ) |
narshu | 13:57ea4e520dbd | 68 | ) { |
narshu | 13:57ea4e520dbd | 69 | |
narshu | 13:57ea4e520dbd | 70 | diffDir = rectifyAng(currTheta - ai.target.theta); |
narshu | 13:57ea4e520dbd | 71 | //diffSpeed = diffDir / PI; |
narshu | 13:57ea4e520dbd | 72 | |
narshu | 13:57ea4e520dbd | 73 | PIDControllerMotorTheta.setProcessValue(diffDir); |
narshu | 13:57ea4e520dbd | 74 | float tempPidVar = PIDControllerMotorTheta.compute(); |
narshu | 13:57ea4e520dbd | 75 | motors.setSpeed( -int(tempPidVar*MOVE_SPEED), int(tempPidVar*MOVE_SPEED)); |
narshu | 13:57ea4e520dbd | 76 | |
narshu | 13:57ea4e520dbd | 77 | if (abs(diffDir) < ANGLE_TOR) { |
narshu | 13:57ea4e520dbd | 78 | |
narshu | 14:24f994dc2770 | 79 | static unsigned int lasttargetnumber = 1; |
narshu | 14:24f994dc2770 | 80 | if (localtargetnumber > lasttargetnumber) { |
narshu | 13:57ea4e520dbd | 81 | ai.thr_AI.signal_set(0x01); |
narshu | 13:57ea4e520dbd | 82 | lasttargetnumber++; |
narshu | 13:57ea4e520dbd | 83 | } |
narshu | 13:57ea4e520dbd | 84 | } |
narshu | 13:57ea4e520dbd | 85 | } |
narshu | 13:57ea4e520dbd | 86 | |
narshu | 13:57ea4e520dbd | 87 | // adjust motion to reach target ---------------------------- |
narshu | 13:57ea4e520dbd | 88 | else { |
narshu | 13:57ea4e520dbd | 89 | |
narshu | 13:57ea4e520dbd | 90 | // calc direction to target |
narshu | 13:57ea4e520dbd | 91 | float targetDir = atan2(ai.target.y - currY, ai.target.x - currX); |
narshu | 13:57ea4e520dbd | 92 | if (!ai.target.facing) targetDir = targetDir - PI; |
narshu | 13:57ea4e520dbd | 93 | |
narshu | 13:57ea4e520dbd | 94 | //Angle differene in -PI to PI |
narshu | 13:57ea4e520dbd | 95 | diffDir = rectifyAng(currTheta - targetDir); |
narshu | 13:57ea4e520dbd | 96 | |
narshu | 13:57ea4e520dbd | 97 | //Set PID process variable |
narshu | 13:57ea4e520dbd | 98 | PIDControllerMotorTheta.setProcessValue(diffDir); |
narshu | 13:57ea4e520dbd | 99 | PIDControllerMotorTheta2.setProcessValue(diffDir); |
narshu | 13:57ea4e520dbd | 100 | |
narshu | 13:57ea4e520dbd | 101 | //if diffDIr is neg, spin right |
narshu | 13:57ea4e520dbd | 102 | //if diffDir is pos, spin left |
narshu | 13:57ea4e520dbd | 103 | |
narshu | 13:57ea4e520dbd | 104 | if (abs(diffDir) > ANGLE_TOR*4) { //roughly 32 degrees |
narshu | 13:57ea4e520dbd | 105 | //ANGLE_TOR*4 |
narshu | 13:57ea4e520dbd | 106 | float tempPidVar = PIDControllerMotorTheta.compute(); |
narshu | 13:57ea4e520dbd | 107 | motors.setSpeed( -int(tempPidVar*MOVE_SPEED), int(tempPidVar*MOVE_SPEED)); |
narshu | 13:57ea4e520dbd | 108 | //pc.printf("spin,%f\n",diffDir); |
narshu | 13:57ea4e520dbd | 109 | |
narshu | 13:57ea4e520dbd | 110 | } else { |
narshu | 13:57ea4e520dbd | 111 | |
narshu | 13:57ea4e520dbd | 112 | float tempPidVar = PIDControllerMotorTheta2.compute(); |
narshu | 14:24f994dc2770 | 113 | float MoveSpeedLimiter = 1; |
narshu | 13:57ea4e520dbd | 114 | //pc.printf("turn,%f\n",diffDir); |
narshu | 14:24f994dc2770 | 115 | |
narshu | 14:24f994dc2770 | 116 | float distanceToX = (float)abs(currX - ai.target.x); |
narshu | 14:24f994dc2770 | 117 | float distanceToY = (float)abs(currY - ai.target.y); |
narshu | 14:24f994dc2770 | 118 | |
narshu | 14:24f994dc2770 | 119 | float distanceToTarget = sqrt(distanceToX*distanceToX+distanceToY*distanceToY); |
narshu | 14:24f994dc2770 | 120 | |
narshu | 14:24f994dc2770 | 121 | if (distanceToTarget < 500) { |
narshu | 14:24f994dc2770 | 122 | MoveSpeedLimiter = (distanceToTarget)/500; |
narshu | 14:24f994dc2770 | 123 | } |
narshu | 14:24f994dc2770 | 124 | |
narshu | 13:57ea4e520dbd | 125 | // calculte the motor speeds |
narshu | 13:57ea4e520dbd | 126 | if (tempPidVar >= 0) { |
narshu | 13:57ea4e520dbd | 127 | //turn left |
narshu | 14:24f994dc2770 | 128 | speedL = (1-abs(tempPidVar))*MOVE_SPEED*MoveSpeedLimiter; |
narshu | 14:24f994dc2770 | 129 | speedR = MOVE_SPEED*MoveSpeedLimiter; |
narshu | 13:57ea4e520dbd | 130 | |
narshu | 13:57ea4e520dbd | 131 | } else { |
narshu | 13:57ea4e520dbd | 132 | //turn right |
narshu | 14:24f994dc2770 | 133 | speedR = (1-abs(tempPidVar))*MOVE_SPEED*MoveSpeedLimiter; |
narshu | 14:24f994dc2770 | 134 | speedL = MOVE_SPEED*MoveSpeedLimiter; |
narshu | 13:57ea4e520dbd | 135 | } |
narshu | 14:24f994dc2770 | 136 | |
narshu | 14:24f994dc2770 | 137 | |
narshu | 14:24f994dc2770 | 138 | |
narshu | 14:24f994dc2770 | 139 | |
narshu | 13:57ea4e520dbd | 140 | if (ai.target.facing) motors.setSpeed( int(speedL), int(speedR)); |
narshu | 13:57ea4e520dbd | 141 | else motors.setSpeed( -int(speedR), -int(speedL)); |
narshu | 13:57ea4e520dbd | 142 | |
narshu | 13:57ea4e520dbd | 143 | } |
narshu | 13:57ea4e520dbd | 144 | } |
narshu | 13:57ea4e520dbd | 145 | |
narshu | 13:57ea4e520dbd | 146 | // wait |
narshu | 13:57ea4e520dbd | 147 | Thread::wait(MOTION_UPDATE_PERIOD); |
narshu | 13:57ea4e520dbd | 148 | } |
narshu | 13:57ea4e520dbd | 149 | } |