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Variational Kalman Filtering with H∞-Based Correction for Robust Bayesian Learning in High Dimensions | IEEE Conference Publication | IEEE Xplore

Variational Kalman Filtering with H∞-Based Correction for Robust Bayesian Learning in High Dimensions


Abstract:

In this paper, we address the problem of convergence of sequential variational inference filter (VIF) through the application of a robust variational objective and H∞-nor...Show More

Abstract:

In this paper, we address the problem of convergence of sequential variational inference filter (VIF) through the application of a robust variational objective and H∞-norm based correction for a linear Gaussian system. As the dimension of state or parameter space grows, performing the full Kalman update with the dense covariance matrix for a large-scale system requires increased storage and computational complexity, making it impractical. The VIF approach, based on mean-field Gaussian variational inference, reduces this burden through the variational approximation to the covariance usually in the form of a diagonal covariance approximation. The challenge is to retain convergence and correct for biases introduced by the sequential VIF steps. We desire a frame-work that improves feasibility while still maintaining reasonable proximity to the optimal Kalman filter as data is assimilated. To accomplish this goal, a H∞-norm based optimization perturbs the VIF covariance matrix to improve robustness. This yields a novel VIF-H∞ recursion that employs consecutive variational inference and H∞ based optimization steps. We explore the development of this method and investigate a numerical example to illustrate the effectiveness of the proposed filter.
Date of Conference: 06-09 December 2022
Date Added to IEEE Xplore: 10 January 2023
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Conference Location: Cancun, Mexico

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