Optimal preview control for a linear continuous-time stochastic control system in finite-time horizon

Jiang Wu, Fucheng Liao and Masayoshi Tomizuka

International Journal of Systems Science, 2017, vol. 48, issue 1, 129-137

Abstract: This paper discusses the design of the optimal preview controller for a linear continuous-time stochastic control system in finite-time horizon, using the method of augmented error system. First, an assistant system is introduced for state shifting. Then, in order to overcome the difficulty of the state equation of the stochastic control system being unable to be differentiated because of Brownian motion, the integrator is introduced. Thus, the augmented error system which contains the integrator vector, control input, reference signal, error vector and state of the system is reconstructed. This leads to the tracking problem of the optimal preview control of the linear stochastic control system being transformed into the optimal output tracking problem of the augmented error system. With the method of dynamic programming in the theory of stochastic control, the optimal controller with previewable signals of the augmented error system being equal to the controller of the original system is obtained. Finally, numerical simulations show the effectiveness of the controller.

Date: 2017
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DOI: 10.1080/00207721.2016.1160456

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