
Accession Number : AD0766440
Title : Optimal Incomplete Feedback Control of Linear Stochastic Systems.
Descriptive Note : Final rept. Jul 71Feb 73,
Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHTPATTERSON AFB OHIO
Personal Author(s) : Heath,Robert E. , II
Report Date : JUN 1973
Pagination or Media Count : 225
Abstract : STIC LINEAR SYSTEMS IS CONSIDERED. The system is modeled by an uncertain parameter linear differential equation driven by Gaussian white noise and an incomplete observation which is a linear transformation of the states. The optimal control is the linear transformation of the observation which minimizes the expected value of a quadratic performance index. For both finite and infinite time problems, necessary conditions that the optimal control law must satisfy are derived. Timevarying and constant gains are considered for the finitetime problem. For the infinitetime problem only timeinvariant gains are considered. The gradient derived for the infinitetime problem is applied to a flight control design problem. This problem concerns finding feedback gains to improve the lateral handling qualities of an F4 aircraft at two different flight conditions. The resulting control laws give quite adequate aircraft handling qualities for the aircraft at both flight conditions. (Author)
Descriptors : (*FLIGHT CONTROL SYSTEMS, MATHEMATICAL MODELS), (*JET FIGHTERS, FLIGHT CONTROL SYSTEMS), LINEAR SYSTEMS, STOCHASTIC PROCESSES, DIFFERENTIAL EQUATIONS, MATRICES(MATHEMATICS), FEEDBACK, COMPUTER PROGRAMS, OPTIMIZATION
Subject Categories : Attack and Fighter Aircraft
Statistics and Probability
Distribution Statement : APPROVED FOR PUBLIC RELEASE