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Fixed issues with factor and IMU parameters

release/4.3a0
dellaert 2016-04-10 10:56:09 -07:00
parent f967a54c70
commit 71b6c1da82
1 changed files with 14 additions and 9 deletions
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23
matlab/unstable_examples/FlightCameraTransformIMU.m
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@ -31,6 +31,12 @@ IMU_metadata.AccelerometerBiasSigma = 1e-6;
IMU_metadata.GyroscopeBiasSigma = 1e-6;
IMU_metadata.IntegrationSigma = 1e-1;
n_gravity = [0;0;-9.8];
IMU_params = PreintegrationParams(n_gravity);
IMU_params.setAccelerometerCovariance(IMU_metadata.AccelerometerSigma.^2 * eye(3));
IMU_params.setGyroscopeCovariance(IMU_metadata.GyroscopeSigma.^2 * eye(3));
IMU_params.setIntegrationCovariance(IMU_metadata.IntegrationSigma.^2 * eye(3));
transformKey = 1000;
calibrationKey = 2000;
@ -52,7 +58,7 @@ K = Cal3_S2(20,1280,960);
% initialize K incorrectly
K_corrupt = Cal3_S2(K.fx()+10,K.fy()+10,0,K.px(),K.py());
isamParams = gtsam.ISAM2Params;
isamParams = ISAM2Params;
isamParams.setFactorization('QR');
isam = ISAM2(isamParams);
@ -63,7 +69,6 @@ currentBias = imuBias.ConstantBias(zeros(3,1), zeros(3,1));
sigma_init_v = noiseModel.Isotropic.Sigma(3, 1.0);
sigma_init_b = noiseModel.Isotropic.Sigmas([ 0.100; 0.100; 0.100; 5.00e-05; 5.00e-05; 5.00e-05 ]);
sigma_between_b = [ IMU_metadata.AccelerometerBiasSigma * ones(3,1); IMU_metadata.GyroscopeBiasSigma * ones(3,1) ];
g = [0;0;-9.8];
w_coriolis = [0;0;0];
%% generate trajectory and landmarks
@ -181,12 +186,14 @@ for i=1:size(trajectory)-1
zKey = measurementKeys.at(zz);
lKey = symbol('l',symbolIndex(zKey));
fg.add(TransformCalProjectionFactorCal3_S2(measurements.atPoint2(zKey), ...
fg.add(ProjectionFactorPPPCCal3_S2(measurements.atPoint2(zKey), ...
z_cov, xKey, transformKey, lKey, calibrationKey, false, true));
% only add landmark to values if doesn't exist yet
if ~result.exists(lKey)
noisy_landmark = landmarks.atPoint3(lKey).compose(Point3(normrnd(0,landmark_noise,3,1)));
p = landmarks.atPoint3(lKey);
n = normrnd(0,landmark_noise,3,1);
noisy_landmark = Point3(p.x()+n(1),p.y()+n(2),p.z()+n(3));
initial.insert(lKey, noisy_landmark);
% and add a prior since its position is known
@ -211,11 +218,9 @@ for i=1:size(trajectory)-1
% [ currentIMUPoseGlobal, currentVelocityGlobal ] = imuSimulator.integrateTrajectory( ...
% currentIMUPoseGlobal, omega, velocity, velocity, deltaT);
currentSummarizedMeasurement = gtsam.ImuFactorPreintegratedMeasurements( ...
currentBias, IMU_metadata.AccelerometerSigma.^2 * eye(3), ...
IMU_metadata.GyroscopeSigma.^2 * eye(3), IMU_metadata.IntegrationSigma.^2 * eye(3));
currentSummarizedMeasurement = PreintegratedImuMeasurements(IMU_params,currentBias);
accMeas = acc_omega(1:3)-g;
accMeas = acc_omega(1:3)-n_gravity;
omegaMeas = acc_omega(4:6);
currentSummarizedMeasurement.integrateMeasurement(accMeas, omegaMeas, deltaT);
@ -223,7 +228,7 @@ for i=1:size(trajectory)-1
fg.add(ImuFactor( ...
xKey_prev, currentVelKey-1, ...
xKey, currentVelKey, ...
currentBiasKey, currentSummarizedMeasurement, g, w_coriolis));
currentBiasKey, currentSummarizedMeasurement));
% Bias evolution as given in the IMU metadata
fg.add(BetweenFactorConstantBias(currentBiasKey-1, currentBiasKey, imuBias.ConstantBias(zeros(3,1), zeros(3,1)), ...