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Medanic, Juraj V. Veillette, Robert Joseph 2011-05-07T12:43:05Z 2011-05-07T12:43:05Z 10000-01-01 1990 This thesis presents a new method of decentralized linear, time-invariant control system synthesis based on the algebraic Riccati equation (ARE). The basic decentralized design guarantees closed-loop stability and a predetermined level of worst-case disturbance attenuation. Certain modifications of the basic design guarantee the stability and disturbance attenuation to be robust despite plant uncertainty or reliable despite control-component outages. Other modifications guarantee that a subset of the controllers will be open-loop stable. The derived decentralized control laws consist of a full-order observer of the plant in each control channel. Each observer includes estimates of the controls generated by the other channels and of plant disturbance inputs, based on its own estimate of the state of the plant. All of the observer gains are computed from the solution of a single Riccati-like algebraic equation, while feedback gains are computed from a state-feedback design ARE. The existence of appropriate solutions to the design equations is sufficient to guarantee the various properties of the closed-loop system. A convexity property of a certain matrix Riccati function allows parameterization of families of control laws with the same desired properties. Each value of the parameter results in controller realizations of the same order as the plant. Made available in DSpace on 2011-05-07T12:43:05Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9026343.pdf: 2898610 bytes, checksum: bafdae4f515e90f9df3a3ef9fcf844d0 (MD5) Previous issue date: 1990 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:44:47Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:19:45-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9026343 (UMI)AAI9026343 http://hdl.handle.net/2142/20572 eng Copyright 1990 Veillette, Robert Joseph Engineering, Electronics and Electrical Reliable control of decentralized systems: An ARE-based H(infinity) approach text Electrical and Computer Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.