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Target Quaternion Fix #847

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meggert merged 3 commits from target-quaternion-fix into main 2024-01-22 10:36:33 +01:00
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1 changed files with 3 additions and 2 deletions
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mission/controller/acs/Guidance.cpp
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@ -418,8 +418,9 @@ void Guidance::comparePtg(double currentQuat[4], double currentSatRotRate[3], do
double targetSatRotRate[3], double refQuat[4], double refSatRotRate[3],
double errorQuat[4], double errorSatRotRate[3], double &errorAngle) {
// First calculate error quaternion between current and target orientation
QuaternionOperations::inverse(targetQuat, targetQuat);
QuaternionOperations::multiply(currentQuat, targetQuat, errorQuat);
double invTargetQuat[4] = {0, 0, 0, 0};
QuaternionOperations::inverse(targetQuat, invTargetQuat);
QuaternionOperations::multiply(currentQuat, invTargetQuat, errorQuat);
// Last calculate add rotation from reference quaternion
QuaternionOperations::multiply(refQuat, errorQuat, errorQuat);
// Keep scalar part of quaternion positive