Title
The Separation Principle in Stochastic Control, Redux
Abstract
Over the last 50 years, a steady stream of accounts have been written on the separation principle of stochastic control. Even in the context of the linear-quadratic regulator in continuous time with Gaussian white noise, subtle difficulties arise, unexpected by many, that are often overlooked. In this paper we propose a new framework for establishing the separation principle. This approach takes the viewpoint that stochastic systems are well-defined maps between sample paths rather than stochastic processes per se and allows us to extend the separation principle to systems driven by martingales with possible jumps. While the approach is more in line with real-life engineering thinking where signals travel around the feedback loop, it is unconventional from a probabilistic point of view in that control laws for which the feedback equations are satisfied almost surely, and not deterministically for every sample path, are excluded.
Year
DOI
Venue
2011
10.1109/TAC.2013.2259207
Clinical Orthopaedics and Related Research
Keywords
DocType
Volume
Process control,Stochastic processes,Noise,Kalman filters,Feedback loop,Linear systems,Riccati equations
Journal
abs/1103.3
Issue
ISSN
Citations 
10
Automatic Control, IEEE Transactions on 58.10 (2013): 2481-2494
7
PageRank 
References 
Authors
1.05
3
2
Name
Order
Citations
PageRank
Tryphon T. Georgiou121136.71
Anders Lindquist247967.64