Stochastic Model Predictive Control for Constrained Linear Systems Using Optimal Covariance Steering

Abstract

This work develops a stochastic model predictive controller~(SMPC) for uncertain linear systems with additive Gaussian noise subject to state and control constraints. The proposed approach is based on the recently developed finite-horizon optimal covariance steering control theory, which steers the mean and the covariance of the system state to prescribed target values at a given terminal time. We call our approach covariance steering-based SMPC, or CS-SMPC. We show that the proposed approach has several advantages over traditional SMPC approaches in the literature. Specifically, it is shown that the newly developed algorithm can deal with unbounded Gaussian additive noise while ensuring stability and recursive feasibility, and incurs lower computational cost than previous similar approaches. The effectiveness of the proposed CS-SMPC approach is confirmed using numerical simulations.