Accession Number : ADA307807

Title :   Robust Game Theoretic Guidance and Control Laws for Missile Systems.

Descriptive Note : Final rept. 1 Jun 92-31 May 95,

Corporate Author : CALIFORNIA UNIV LOS ANGELES

Personal Author(s) : Speyer, Jason L.

PDF Url : ADA307807

Report Date : 01 DEC 1995

Pagination or Media Count : 87

Abstract : The objective of our efforts was to extend and apply a new adaptive control technique based on a disturbance attenuation bound. The structure of this new adaptive control scheme is the result of formulating a disturbance attenuation problem for a particular class of nonlinear systems whose solution is obtained without any approximation. A global solution is obtained and must be contrasted with much of the nonlinear infinity results which assume that the scheme operates locally about some equilibrium condition. The class of nonlinearities considered is that of a linear system where the coefficient matrix of the control is assumed to be a linear function of an unknown parameter. The work performed on this grant extended this class to include state coefficients matrices linear in the parameter if the associated state that multiplies this term is measured perfectly. To bring these mathematical abstractions to engineering practice, a significant effort was made to apply this new adaptive control scheme to the development of an adaptive flight control system. We are just beginning to show performance improvements in the time response over that of standard adaptive controllers due to an initial reduction in the control effort associated with those control system parameters that are initially uncertain. This new adaptive controller involves not only the state and parameter estimates, but also the pseudo covariance matrix. This new adaptive scheme does require the determination of the global maxima of a certain function with respect to the uncertain parameters.

Descriptors :   *GUIDED MISSILES, *ADAPTIVE CONTROL SYSTEMS, *FLIGHT CONTROL SYSTEMS, *GAME THEORY, LINEAR SYSTEMS, GLOBAL, PARAMETERS, REACTION TIME, EQUILIBRIUM(GENERAL), ESTIMATES, NONLINEAR SYSTEMS, SOLUTIONS(GENERAL), ENGINEERING, LINEARITY, ATTENUATION, GUIDANCE, CONTROL THEORY, FUNCTIONS(MATHEMATICS), GAUSSIAN QUADRATURE.

Subject Categories : Operations Research
      Guided Missile Traj, Accuracy and Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE