Hesu-eco
/
limiteur_vitesse
premiere ebauche
speedlimiter.cpp
- Committer:
- shovelcat
- Date:
- 2018-11-06
- Revision:
- 8:51549d7108dd
- Parent:
- 7:d636d073b942
- Child:
- 9:3e8bb4aba7c7
File content as of revision 8:51549d7108dd:
/* author: Sebastian Pelchat date: october 2018 */ #include "speedlimiter.hpp" #define debug SpeedLimiter::pc->printf const float valeursVitessesRecommandes[20] = {0,2.7546,5.5052,8.2467,10.974,13.682,16.365,19.23,22.058,24.846,27.587,29.858,29.981,29.876,29.968,29.833,29.895,29.941,29.888,29.937}; float getNextReferenceSpeed() { static int index = 0; return valeursVitessesRecommandes[index++]; } Serial* SpeedLimiter::pc = new Serial(USBTX, USBRX); SpeedLimiter::SpeedLimiter(const PinName& pedalInHi, const PinName& pedalInLo, const PinName& pedalOutHi, const PinName& pedalOutLo) : _pedalInHi(pedalInHi) , _pedalInLo(pedalInLo) , _pedalOutHi(pedalOutHi) , _pedalOutLo(pedalOutLo) , _referenceSpeed(DISABLE_ECO_ALGO_TRIGGER) , _measuredSpeed(0.0) { } SpeedLimiter::~SpeedLimiter() { } void SpeedLimiter::ipControllerTransferFunction() { static int counter = 0; // une fois par 10 * 0.1 secondes -> 1 seconde if (counter < 10 - 1) { counter++; } else { counter = 0; float nextReferenceSpeed = getNextReferenceSpeed(); setReferenceSpeed(getNextReferenceSpeed()); pc->printf("%f\n\r", nextReferenceSpeed); } // write voltages at beginning of function to prevent jitter // voltage will be delayed by 1 call which is okay. // pc->printf("H\n\r"); const float voutHi = getOutputPedalVoltageHi(); const float voutLo = getOutputPedalVoltageLo(); // pc->printf("Hi: %f\t Lo: %f\n\r", voutHi, voutLo); writeAdcPedalHi(voutHi); writeAdcPedalLo(voutLo); // calculate voltage for next call const float referenceSpeed = getReferenceSpeed(); float outputAdcVoltageHi = 0; float outputAdcVoltageLo = 0; if(referenceSpeed == DISABLE_ECO_ALGO_TRIGGER) { outputAdcVoltageHi = ecoDisabledAlgorithm(); } else { outputAdcVoltageHi = ecoEnabledAlgorithm(); } // outputAdcVoltageHi = ADC_OUTPUT_MAX_VALUE / 2; outputAdcVoltageLo = outputAdcVoltageHi / 2; // pc->printf("tmpHi: %f\t tmpLo: %f\n\r", outputAdcVoltageHi, outputAdcVoltageLo); setOutputPedalVoltageHi(outputAdcVoltageHi); setOutputPedalVoltageLo(outputAdcVoltageLo); } // Returns voltage read on analog input port chosen for pedal input 1 float SpeedLimiter::readAdcPedalHi() { const float decPcValue = _pedalInHi.read(); const float voltage = decPcValue * ADC_INPUT_MAX_VALUE; return voltage; } // Returns voltage read on analog input port chosen for pedal input 2 float SpeedLimiter::readAdcPedalLo() { const float decPcValue = _pedalInLo.read(); const float voltage = decPcValue * ADC_INPUT_MAX_VALUE; return voltage; } // Accepts a value in volts, converts to % and sets ADC for pedal output 1 void SpeedLimiter::writeAdcPedalHi(const float voltage) { const float boundedValue = boundValue(voltage, PEDAL_HI_MIN_VALUE, PEDAL_HI_MAX_VALUE); const float decValue = voltageToDecimal(boundedValue, ADC_OUTPUT_MAX_VALUE); _pedalOutHi.write(decValue); } // Accepts a value in volts, converts to % and sets ADC for pedal output 2 void SpeedLimiter::writeAdcPedalLo(const float voltage) { const float boundedValue = boundValue(voltage, PEDAL_LO_MIN_VALUE, PEDAL_LO_MAX_VALUE); const float decValue = voltageToDecimal(boundedValue, ADC_OUTPUT_MAX_VALUE); _pedalOutLo.write(decValue); } float SpeedLimiter::ecoDisabledAlgorithm() { const float value = readAdcPedalHi(); return value; } float SpeedLimiter::ecoEnabledAlgorithm() { static bool first_acquisition = true; // constants calibrated in vehicul double var = readAdcTest(); double Kp = 18000 ; double Ki = 4300.0; // valeurs anterieures static double ie = 0.0; // calculs double Vm = getMeasuredSpeed(); double Vd = 20; double out = 0.0; if (readAdcPedalHi() > 1) { double e = Vd - Vm; double eMax = 4; if(e > eMax) e = eMax; const double dt = TRANSFER_FUNCTION_PERIOD; ie = ie + e*dt; out = Kp*e + Ki*ie; // out est maintenant en 'force' out = (out / 133240.0 * (PEDAL_HI_MAX_VALUE-PEDAL_HI_MIN_VALUE)) + PEDAL_HI_MIN_VALUE; if(first_acquisition) { pc->printf("Acquisition start:\n\r"); first_acquisition = false; } } else { ie = 0.00000000001; first_acquisition = true; } pc->printf("Vm: %.2f\t Vd: %.2f\t Eh: %.2f\t Kp: %.2f\tVar: %.2f\n\r", Vm, Vd, out, Ki, var); return (float)out; } // Returns 'value' bounded between 'lowerBound' and 'upperBound' float SpeedLimiter::boundValue(float value, const float lowerBound, const float upperBound) { if(value < lowerBound) { value = lowerBound; } else if(value > upperBound) { value = upperBound; } return value; } // Returns "value/reference" as a percentage in decimal form (0.5 for 50%) float SpeedLimiter::voltageToDecimal(const float voltage, const float reference) { return voltage/reference; }