Computer-Aided Design of Robust Decentralized Controllers.
Final rept. Sep 84-May 85,
SCIENTIFIC SYSTEMS INC CAMBRIDGE MA
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Significant progress was made on all of the tasks proposed for the Phase I feasibility effort. In addition to the 4 tasks that was originally proposed, a new subtask on simultaneously stabilizing controllers was included, and a model of a flexible structure was used for which two types of fault tolerant controllers were designed. The concept of fixed modes was extended to that of a decentralized fixed determinant and significant new results for characterizing fixed determinants were obtained. A characterization of all decentralized controllers was obtained based on which conditions for the existence of robust decentralized controllers were derived, in case of a two channel system. Finally, and iterative solution of nonlinear programming type was proposed for optimal decentralized filtering of a two-channel system. In this way a firm foundation in Phase I was laid based on which a state-of-the-art approach to computer-aided design of robust decentralized control problems can be carried out. Additional keywords Numerical methods and procedures Flight dynamics Computations. Author