Vector4f LIPStateEstimator::measure(SupportFoot supportFoot, const Vector2f& LIPOrigin) const
{
const Pose3f& supportFootToTorso = supportFoot == SupportFoot::left ? theRobotModel.soleLeft : theRobotModel.soleRight;
const Quaternionf& torsoToWorld = theInertialData.orientation2D;
const Pose3f originToTorso = supportFootToTorso + Vector3f(LIPOrigin.x(), LIPOrigin.y(), 0.f);
const Vector3f comInOrigin = originToTorso.inverse() * theRobotModel.centerOfMass;
const Vector3f com = (torsoToWorld * originToTorso.rotation) * comInOrigin;
PLOT("module:ZmpWalkingEngine:LIPStateEstimator:Estimate:measuredComHeight", com.z());
const Vector2f accInWorld = (torsoToWorld * theInertialData.acc * 1000.f).head<2>();
const Vector2f zmp = com.head<2>().array() - (accInWorld.array() / LIP3D(LIPHeights).getK().square());
return (Vector4f() << com.head<2>(), zmp).finished();
}
LIPStateEstimator::EstimatedState LIPStateEstimator::convertToOtherFoot(const EstimatedState& state) const
{
EstimatedState otherState(state);
otherState.supportFoot = state.supportFoot == SupportFoot::left ? SupportFoot::right : SupportFoot::left;
otherState.origin.y() *= -1.f;
const Pose3f& soleToTorso = state.supportFoot == SupportFoot::left ? theRobotModel.soleLeft : theRobotModel.soleRight;
const Pose3f& otherSoleToTorso = state.supportFoot == SupportFoot::left ? theRobotModel.soleRight : theRobotModel.soleLeft;
const Pose3f originToTorso = soleToTorso + Vector3f(state.origin.x(), state.origin.y(), 0.f);
const Pose3f otherOriginToTorso = otherSoleToTorso + Vector3f(otherState.origin.x(), otherState.origin.y(), 0.f);
//const Quaternionf& torsoToWorld = theInertiaData.orientation;
//Pose3f oritinToOtherOrigin = Pose3f(torsoToWorld) * otherOriginToTorso.rotation * otherOriginToTorso.inverse() * originToTorso * originToTorso.rotation.inverse() *= torsoToWorld.inverse();
const Pose3f oritinToOtherOrigin = otherOriginToTorso.inverse() * originToTorso;
otherState.com.position = (oritinToOtherOrigin * Vector3f(state.com.position.x(), state.com.position.y(), 0.f)).head<2>();
otherState.com.velocity = (oritinToOtherOrigin.rotation * Vector3f(state.com.velocity.x(), state.com.velocity.y(), 0.f)).head<2>();
otherState.zmp = (oritinToOtherOrigin * Vector3f(state.zmp.x(), state.zmp.y(), 0.f)).head<2>();
return otherState;
}
void InertialDataFilter::update(InertialData& inertialData)
{
DECLARE_PLOT("module:InertialDataFilter:expectedAccX");
DECLARE_PLOT("module:InertialDataFilter:accX");
DECLARE_PLOT("module:InertialDataFilter:expectedAccY");
DECLARE_PLOT("module:InertialDataFilter:accY");
DECLARE_PLOT("module:InertialDataFilter:expectedAccZ");
DECLARE_PLOT("module:InertialDataFilter:accZ");
// check whether the filter shall be reset
if(!lastTime || theFrameInfo.time <= lastTime)
{
if(theFrameInfo.time == lastTime)
return; // weird log file replaying?
reset();
}
if(theMotionInfo.motion == MotionRequest::specialAction && theMotionInfo.specialActionRequest.specialAction == SpecialActionRequest::playDead)
{
reset();
}
// get foot positions
Pose3f leftFoot = theRobotModel.limbs[Limbs::footLeft];
Pose3f rightFoot = theRobotModel.limbs[Limbs::footRight];
leftFoot.translate(0.f, 0.f, -theRobotDimensions.footHeight);
rightFoot.translate(0.f, 0.f, -theRobotDimensions.footHeight);
const Pose3f leftFootInvert(leftFoot.inverse());
const Pose3f rightFootInvert(rightFoot.inverse());
// calculate rotation and position offset using the robot model (joint data)
const Pose3f leftOffset(lastLeftFoot.translation.z() != 0.f ? Pose3f(lastLeftFoot).conc(leftFootInvert) : Pose3f());
const Pose3f rightOffset(lastRightFoot.translation.z() != 0.f ? Pose3f(lastRightFoot).conc(rightFootInvert) : Pose3f());
// detect the foot that is on ground
bool useLeft = true;
if(theMotionInfo.motion == MotionRequest::walk && theWalkingEngineOutput.speed.translation.x() != 0)
{
useLeft = theWalkingEngineOutput.speed.translation.x() > 0 ?
(leftOffset.translation.x() > rightOffset.translation.x()) :
(leftOffset.translation.x() < rightOffset.translation.x());
}
else
{
Pose3f left(mean.rotation);
Pose3f right(mean.rotation);
left.conc(leftFoot);
right.conc(rightFoot);
useLeft = left.translation.z() < right.translation.z();
}
// update the filter
const float timeScale = theFrameInfo.cycleTime;
predict(RotationMatrix::fromEulerAngles(theInertialSensorData.gyro.x() * timeScale,
theInertialSensorData.gyro.y() * timeScale, 0));
// insert calculated rotation
safeRawAngle = theInertialSensorData.angle.head<2>().cast<float>();
bool useFeet = true;
MODIFY("module:InertialDataFilter:useFeet", useFeet);
if(useFeet &&
(theMotionInfo.motion == MotionRequest::walk || theMotionInfo.motion == MotionRequest::stand ||
(theMotionInfo.motion == MotionRequest::specialAction && theMotionInfo.specialActionRequest.specialAction == SpecialActionRequest::standHigh)) &&
std::abs(safeRawAngle.x()) < calculatedAccLimit.x() && std::abs(safeRawAngle.y()) < calculatedAccLimit.y())
{
const RotationMatrix& usedRotation(useLeft ? leftFootInvert.rotation : rightFootInvert.rotation);
Vector3f accGravOnly(usedRotation.col(0).z(), usedRotation.col(1).z(), usedRotation.col(2).z());
accGravOnly *= Constants::g_1000;
readingUpdate(accGravOnly);
}
else // insert acceleration sensor values
readingUpdate(theInertialSensorData.acc);
// fill the representation
inertialData.angle = Vector2a(std::atan2(mean.rotation.col(1).z(), mean.rotation.col(2).z()), std::atan2(-mean.rotation.col(0).z(), mean.rotation.col(2).z()));
inertialData.acc = theInertialSensorData.acc;
inertialData.gyro = theInertialSensorData.gyro;
inertialData.orientation = Rotation::removeZRotation(Quaternionf(mean.rotation));
// this keeps the rotation matrix orthogonal
mean.rotation.normalize();
// store some data for the next iteration
lastLeftFoot = leftFoot;
lastRightFoot = rightFoot;
lastTime = theFrameInfo.time;
// plots
Vector3f angleAxisVec = Rotation::AngleAxis::pack(AngleAxisf(inertialData.orientation));
PLOT("module:InertialDataFilter:angleX", toDegrees(angleAxisVec.x()));
PLOT("module:InertialDataFilter:angleY", toDegrees(angleAxisVec.y()));
PLOT("module:InertialDataFilter:angleZ", toDegrees(angleAxisVec.z()));
PLOT("module:InertialDataFilter:unfilteredAngleX", theInertialSensorData.angle.x().toDegrees());
PLOT("module:InertialDataFilter:unfilteredAngleY", theInertialSensorData.angle.y().toDegrees());
angleAxisVec = Rotation::AngleAxis::pack(AngleAxisf(mean.rotation));
PLOT("module:InertialDataFilter:interlanAngleX", toDegrees(angleAxisVec.x()));
PLOT("module:InertialDataFilter:interlanAngleY", toDegrees(angleAxisVec.y()));
PLOT("module:InertialDataFilter:interlanAngleZ", toDegrees(angleAxisVec.z()));
}
