diff --git a/Main/motorControl.ino b/Main/motorControl.ino index 7abcd54..c3bd071 100644 --- a/Main/motorControl.ino +++ b/Main/motorControl.ino @@ -2,59 +2,76 @@ const int MOTOR_SATURATION = round(pow(2, PWM_RESOLUTION)); const float WHEEL_DIAMETER = 0.067708; const float PULSES_PER_TURN = 1320.0; +const float BALANCE_POINT = -0.05; +const float SPEED_REFERENCE = 0.0; +const float DEADBAND_M1_POS = 90.0; +const float DEADBAND_M1_NEG = 90.0; +const float DEADBAND_M2_POS = 90.0; +const float DEADBAND_M2_NEG = 90.0; //Tuning -const float K = 3.5; -const float I = 7.5; -const float filter_gain = 15; +const float K_SC = 15.0; +const float K_OL = 13.0; +const float K_IL = 80.0; +const float I_IL = 5.5; +const float filter_gain = 15.0; //Help variables float M1_Lin_Vel, M2_Lin_Vel; -int M1_Speed_CMD, M2_Speed_CMD; -float M1_iError, M2_iError; +int Speed_CMD, M1_Speed_CMD, M2_Speed_CMD; -float ref, act, error; +float ref_SC, act_SC, error_SC, SC_cont_out; +float ref_OL, act_OL, error_OL, OL_cont_out; +float ref_IL, act_IL, error_IL, iError_IL; void motors() { - //Controllers - ref = pitch * ((4096.0) / (90.0)); - act = M1_Lin_Vel * 4096.0; - error = ref - act; - M1_iError = M1_iError + (error * dT * pow(10, -6) * I); - M1_Speed_CMD = round((error * K) + M1_iError); -// ref = pitch * ((4096.0) / (90.0)); -// act = M2_Lin_Vel * 4096.0; -// error = ref - act; -// M2_iError = M2_iError + (error * dT * pow(10, -6) * I); -// M2_Speed_CMD = round((error * K) + M2_iError); + // Speed Controller + ref_SC = SPEED_REFERENCE; + act_SC = (M1_Lin_Vel + M2_Lin_Vel) / 2; + error_SC = ref_SC - act_SC; + SC_cont_out = (error_SC * K_SC); + // Balance controller + // Outer loop + ref_OL = BALANCE_POINT - SC_cont_out; + act_OL = pitch; + error_OL = ref_OL - act_OL; + OL_cont_out = (error_OL * K_OL); + // Inner loop + ref_IL = OL_cont_out; + act_IL = pitch_rate; + error_IL = ref_IL - act_IL; + iError_IL = iError_IL + (error_IL * dT * pow(10, -6) * I_IL); + Speed_CMD = round((error_IL * K_IL) + iError_IL); + M1_Speed_CMD = Speed_CMD; + M2_Speed_CMD = Speed_CMD; + +// M1_Speed_CMD = 0; +// M2_Speed_CMD = 0; //Calculate speed from encoders M1_Lin_Vel = encoderReader(m1Raw, m1RawLast, M1_Lin_Vel, PULSES_PER_TURN, WHEEL_DIAMETER, dT, filter_gain); - // M2_Lin_Vel = encoderReader(m2Raw, m2RawLast, M2_Lin_Vel, PULSES_PER_TURN, WHEEL_DIAMETER, dT, filter_gain); + M2_Lin_Vel = encoderReader(m2Raw, m2RawLast, M2_Lin_Vel, PULSES_PER_TURN, WHEEL_DIAMETER, dT, filter_gain); - //Motor 1 - motorControl(1, M1_Speed_CMD, MOTOR_SATURATION); - - //Motor 2 -// motorSpeed(2, M2_Speed_CMD, MOTOR_SATURATION); - motorControl(2, 0, MOTOR_SATURATION); + //Motor control + motorControl(1, M1_Speed_CMD, MOTOR_SATURATION, DEADBAND_M1_POS, DEADBAND_M1_NEG); + motorControl(2, M2_Speed_CMD, MOTOR_SATURATION, DEADBAND_M2_POS, DEADBAND_M2_NEG); // Serial plotter - Serial.print("M1_Speed_REF:"); - Serial.print(ref * (100.0 / 4096.0)); + Serial.print("Balance_Point:"); + Serial.print(ref_OL); Serial.print(" "); - Serial.print("M1_Speed_ACT:"); - Serial.print(act * (100.0 / 4096.0)); + Serial.print("Pitch_Angle:"); + Serial.print(act_OL); Serial.print(" "); - Serial.print("M1_Speed_CMD:"); - Serial.println(M1_Speed_CMD * (100.0 / 4096.0)); + Serial.print("Speed_CMD:"); + Serial.println(Speed_CMD * (100.0 / 4096.0)); //Update variables for next scan cycle @@ -63,13 +80,13 @@ void motors() { } float encoderReader(int encRaw, int encRawLast, float lin_vel_filtered_, float pulses_per_turn_, float wheel_diameter_, int dT_, float filt_gain_ ) { - float dEnc_ = encRaw - encRawLast; //[Number of encoder pulses this cycle] - float dTurn_ = dEnc_ / pulses_per_turn_; //[Amount wheel turned this cycle. 1 = full rotation] - float lin_vel_ = (dTurn_ * wheel_diameter_ * PI) / (dT_ * 0.000001); - return lin_vel_filtered_ + ((lin_vel_ - lin_vel_filtered_) * dT_ * 0.000001 * filt_gain_); + float dEnc_ = encRaw - encRawLast; //[Number of encoder pulses this cycle] + float dTurn_ = dEnc_ / pulses_per_turn_; //[Amount wheel turned this cycle. 1 = full rotation] + float lin_vel_ = (dTurn_ * wheel_diameter_ * PI) / (dT_ * 0.000001); + return lin_vel_filtered_ + ((lin_vel_ - lin_vel_filtered_) * dT_ * 0.000001 * filt_gain_); } -void motorControl(byte motorID, int speedCMD_, int saturation) { +void motorControl(byte motorID, int speedCMD_, int saturation, float dbPos_, float dbNeg_) { //Calculate channel byte ch1 = motorID * 2 - 1; byte ch2 = motorID * 2; @@ -82,12 +99,26 @@ void motorControl(byte motorID, int speedCMD_, int saturation) { else if (speedCMD_ < -saturation) { speedCMD_ = -saturation; } + + + //Deadband + else if (speedCMD_ > 0 && speedCMD_ < dbPos_) { + speedCMD_ = dbPos_; + } + else if (speedCMD_ < 0 && speedCMD_ > -dbNeg_) { + speedCMD_ = -dbNeg_; + } + + //Zero speed if input = 0 + else if (speedCMD_ == 0) { + speedCMD_ = 0; + } else { speedCMD_ = speedCMD_; } - //Motor Control + //Apply speed command to PWM output if (speedCMD_ > 0) { ledcWrite(ch1, 0); ledcWrite(ch2, speedCMD_);