A Stochastic Regulator for Integrated Communication and Control Systems: Part I—Formulation of Control Law

[+] Author and Article Information
Luen-Woei Liou, Asok Ray

Mechanical Engineering Department, The Pennsylvania State University, University Park, PA

J. Dyn. Sys., Meas., Control 113(4), 604-611 (Dec 01, 1991) (8 pages) doi:10.1115/1.2896464 History: Received March 27, 1990; Revised January 09, 1991; Online March 17, 2008


Integrated Communication and Control Systems (ICCS), recently introduced and analyzed in a series of papers [1–7], are applicable to complex dynamical processes like advanced aircraft, spacecraft, automotive, and manufacturing processes. Time-division-multiplexed computer networks are employed in ICCS for exchange of information between spatially distributed plant components as well as for coordination of the diverse control and decision-making functions. Unfortunately, an ICCS network introduces randomly varying, distributed delays within the feedback loops in addition to the digital sampling and data processing delays. These network-induced delays degrade the system dynamic performance, and are a source of potential instability. This two-part paper presents the synthesis and performance evaluation of a stochastic optimal control law for ICCS. In this paper, which is the first of two parts, a state feedback control law for ICCS has been formulated by using the dynamic programming and optimality principle on a finite-time horizon. The control law is derived on the basis of a stochastic model of the plant which is augmented in state space to take into account the effects of randomly varying delays in the feedback loop. The second part [8] presents numerical analysis of the control law and its performance evaluation by simulation of the flight dynamic model of an advanced aircraft.

Copyright © 1991 by The American Society of Mechanical Engineers
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