Computer-Aided Design of Robust Decentralized Controllers

摘要

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. (Author)