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added Nadir FLP version
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This commit is contained in:
Robin Marquardt 2022-11-22 21:10:05 +01:00
parent 55dec574c5
commit 609d429161
4 changed files with 101 additions and 2 deletions
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2
mission/controller/AcsController.cpp
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@ -171,7 +171,7 @@ void AcsController::performPointingCtrl() {
guidance.sunQuatPtg(&sensorValues, &outputValues, targetQuat, refSatRate);
break;
case SUBMODE_PTG_NADIR:
guidance.quatNadirPtg(&sensorValues, &outputValues, now, targetQuat, refSatRate);
guidance.quatNadirPtgFLPVersion(&sensorValues, &outputValues, now, targetQuat, refSatRate);
break;
case SUBMODE_PTG_INERTIAL:
guidance.inertialQuatPtg(targetQuat, refSatRate);

1
mission/controller/acs/AcsParameters.h
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@ -852,6 +852,7 @@ class AcsParameters /*: public HasParametersIF*/ {
double nadirRefDirection[3] = {-1, 0, 0}; //Camera
double refQuatInertial[4] = {0, 0, 0, 1};
double refRotRateInertial[3] = {0, 0, 0};
int8_t nadirTimeElapsedMax = 10;
} pointingModeControllerParameters, inertialModeControllerParameters, nadirModeControllerParameters, targetModeControllerParameters;
struct StrParameters {

94
mission/controller/acs/Guidance.cpp
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@ -125,10 +125,10 @@ void Guidance::targetQuatPtg(ACS::SensorValues *sensorValues, ACS::OutputValues
// Calculation of reference rotation rate in case of star tracker blinding
//-------------------------------------------------------------------------------------
if (acsParameters.targetModeControllerParameters.avoidBlindStr) {
double sunDirJ[3] = {0, 0, 0};
double sunDirB[3] = {0, 0, 0};
if (outputValues->sunDirModelValid) {
double sunDirJ[3] = {0, 0, 0};
sunDirJ[0] = outputValues->sunDirModel[0];
sunDirJ[1] = outputValues->sunDirModel[1];
sunDirJ[2] = outputValues->sunDirModel[2];
@ -301,6 +301,98 @@ void Guidance::quatNadirPtg(ACS::SensorValues* sensorValues, ACS::OutputValues *
}
void Guidance::quatNadirPtgFLPVersion(ACS::SensorValues* sensorValues, ACS::OutputValues *outputValues, timeval now,
double targetQuat[4], double refSatRate[3]) {
//-------------------------------------------------------------------------------------
// Calculation of target quaternion for Nadir pointing
//-------------------------------------------------------------------------------------
// Position of the satellite in the earth/fixed frame via GPS
double posSatE[3] = {0, 0, 0};
double geodeticLatRad = (sensorValues->gpsSet.latitude.value)*PI/180;
double longitudeRad = (sensorValues->gpsSet.longitude.value)*PI/180;
MathOperations<double>::cartesianFromLatLongAlt(geodeticLatRad,longitudeRad,
sensorValues->gpsSet.altitude.value, posSatE);
double targetDirE[3] = {0, 0, 0};
VectorOperations<double>::mulScalar(posSatE, -1, targetDirE, 3);
// Transformation between ECEF and IJK frame
double dcmEJ[3][3] = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0}};
double dcmJE[3][3] = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0}};
double dcmEJDot[3][3] = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0}};
MathOperations<double>::ecfToEciWithNutPre(now, *dcmEJ, *dcmEJDot);
MathOperations<double>::inverseMatrixDimThree(*dcmEJ, *dcmJE);
double dcmJEDot[3][3] = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0}};
MathOperations<double>::inverseMatrixDimThree(*dcmEJDot, *dcmJEDot);
// Target Direction in the body frame
double targetDirJ[3] = {0, 0, 0};
MatrixOperations<double>::multiply(*dcmJE, targetDirE, targetDirJ, 3, 3, 1);
// negative x-Axis aligned with target (Camera position)
double xAxis[3] = {0, 0, 0};
VectorOperations<double>::normalize(targetDirJ, xAxis, 3);
VectorOperations<double>::mulScalar(xAxis, -1, xAxis, 3);
// z-Axis parallel to long side of picture resolution
double zAxis[3] = {0, 0, 0};
double velocityE[3] = {outputValues->gpsVelocity[0], outputValues->gpsVelocity[1], outputValues->gpsVelocity[2]};
double velocityJ[3] = {0, 0, 0}, velPart1[3] = {0, 0, 0}, velPart2[3] = {0, 0, 0};
MatrixOperations<double>::multiply(*dcmJE, velocityE, velPart1, 3, 3, 1);
MatrixOperations<double>::multiply(*dcmJEDot, posSatE, velPart2, 3, 3, 1);
VectorOperations<double>::add(velPart1, velPart2, velocityJ, 3);
VectorOperations<double>::cross(xAxis, velocityJ, zAxis);
VectorOperations<double>::normalize(zAxis, zAxis, 3);
// y-Axis completes RHS
double yAxis[3] = {0, 0, 0};
VectorOperations<double>::cross(zAxis, xAxis, yAxis);
//Complete transformation matrix
double dcmTgt[3][3] = {{xAxis[0], yAxis[0], zAxis[0]}, {xAxis[1], yAxis[1], zAxis[1]}, {xAxis[2], yAxis[2], zAxis[2]}};
QuaternionOperations::fromDcm(dcmTgt,targetQuat);
//-------------------------------------------------------------------------------------
// Calculation of reference rotation rate
//-------------------------------------------------------------------------------------
double timeElapsed = now.tv_sec + now.tv_usec * pow(10,-6) - (timeSavedQuaternionNadir.tv_sec +
timeSavedQuaternionNadir.tv_usec * pow(timeSavedQuaternionNadir.tv_usec,-6));
if (timeElapsed < acsParameters.pointingModeControllerParameters.nadirTimeElapsedMax) {
double qDiff[4] = {0, 0, 0, 0};
VectorOperations<double>::subtract(targetQuat, savedQuaternionNadir, qDiff, 4);
VectorOperations<double>::mulScalar(qDiff, 1/timeElapsed, qDiff, 4);
double tgtQuatVec[3] = {targetQuat[0], targetQuat[1], targetQuat[2]},
qDiffVec[3] = {qDiff[0], qDiff[1], qDiff[2]};
double sum1[3] = {0, 0, 0}, sum2[3] = {0, 0, 0}, sum3[3] = {0, 0, 0}, sum[3] = {0, 0, 0};
VectorOperations<double>::cross(targetQuat, qDiff, sum1);
VectorOperations<double>::mulScalar(tgtQuatVec, qDiff[3], sum2, 3);
VectorOperations<double>::mulScalar(qDiffVec, targetQuat[3], sum3, 3);
VectorOperations<double>::add(sum1, sum2, sum, 3);
VectorOperations<double>::subtract(sum, sum3, sum, 3);
double omegaRefNew[3] = {0, 0, 0};
VectorOperations<double>::mulScalar(sum, -2, omegaRefNew, 3);
VectorOperations<double>::mulScalar(omegaRefNew, 2, refSatRate, 3);
VectorOperations<double>::subtract(refSatRate, omegaRefSavedNadir, refSatRate, 3);
omegaRefSavedNadir[0] = omegaRefNew[0];
omegaRefSavedNadir[1] = omegaRefNew[1];
omegaRefSavedNadir[2] = omegaRefNew[2];
}
else {
refSatRate[0] = 0;
refSatRate[1] = 0;
refSatRate[2] = 0;
}
timeSavedQuaternionNadir = now;
savedQuaternionNadir[0] = targetQuat[0];
savedQuaternionNadir[1] = targetQuat[1];
savedQuaternionNadir[2] = targetQuat[2];
savedQuaternionNadir[3] = targetQuat[3];
}
void Guidance::inertialQuatPtg(double targetQuat[4], double refSatRate[3]) {
for (int i = 0; i < 4; i++) {
targetQuat[i] = acsParameters.inertialModeControllerParameters.refQuatInertial[i];

6
mission/controller/acs/Guidance.h
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@ -34,6 +34,9 @@ public:
void quatNadirPtg(ACS::SensorValues* sensorValues, ACS::OutputValues *outputValues, timeval now,
double targetQuat[4], double refSatRate[3]);
void quatNadirPtgFLPVersion(ACS::SensorValues* sensorValues, ACS::OutputValues *outputValues, timeval now,
double targetQuat[4], double refSatRate[3]);
// Function to get the target quaternion and refence rotation rate from parameters for inertial pointing
void inertialQuatPtg(double targetQuat[4], double refSatRate[3]);
@ -48,6 +51,9 @@ public:
private:
AcsParameters acsParameters;
bool strBlindAvoidFlag = false;
timeval timeSavedQuaternionNadir;
double savedQuaternionNadir[4] = {0, 0, 0, 0};
double omegaRefSavedNadir[3] = {0, 0, 0};
};
#endif /* ACS_GUIDANCE_H_ */