Kalman Filtering With Adaptive Step Size Using a Covariance-Based Criterion
Barak Or, B.Z. Bobrovsky, Itzik Klein
Abstract
In Kalman filtering (KF), a tradeoff exists when selecting the filter step size. Generally, a smaller step size improves the estimation accuracy, yet with the cost of a high computational load. To mitigate this tradeoff influence on performance, a criterion that acts as a guideline for a reasonable choice of the step size is proposed. This criterion is based on the predictor-corrector error covariance matrices of the discrete KF. In addition, this criterion is elaborated to an adaptive algorithm, for the case of the time-varying measurement noise covariance. Two simulation examples and a field experiment using a quadcopter are presented and analyzed to show the benefits of the proposed approach.
Topics & Concepts
CovarianceKalman filterQuadcopterCovariance matrixCovariance intersectionNoise (video)Control theory (sociology)Computer scienceAlgorithmExtended Kalman filterAdaptive filterMathematicsMathematical optimizationEstimation of covariance matricesStatisticsEngineeringArtificial intelligenceControl (management)Aerospace engineeringImage (mathematics)Target Tracking and Data Fusion in Sensor NetworksInertial Sensor and NavigationIndoor and Outdoor Localization Technologies