Accession Number : ADA289315

Title :   Improved Numerical Solution of Mixed H(sub 2)/H(infinity) Optimization with Applications.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Smith, Linda D.

PDF Url : ADA289315

Report Date : DEC 1994

Pagination or Media Count : 171

Abstract : This study improved the numerical optimization technique used to compute mixed H2/H infinity controllers. The run time to generate the full curve of an H2/H infinity design was reduced by a factor of almost 200 for a specific example. This was accomplished by improving gradient calculations, upgrading the H infinity norm calculation to capture multiple peaks in the singular value plot and using routines that minimized processing time. The optimization routine used was the MATLAB CONSTR' Sequential Quadratic Programming (SQP) routine. This SQP routine was compared to a FORTRAN SQP numerical optimizer, IMSL/DNCONG. The method was applied to an F-16 SISO example and a missile MIMO example. The mixed H2/H infinity controller for both these examples are compared to previous controller designs created using the LQG/LTR technique.

Descriptors :   *OPTIMIZATION, *MATHEMATICAL PROGRAMMING, *CONTROL THEORY, MATHEMATICAL MODELS, ALGORITHMS, GUIDED MISSILES, COMPUTATIONS, TRANSFER FUNCTIONS, FLIGHT CONTROL SYSTEMS, MATRICES(MATHEMATICS), COMPARISON, GRAPHS, THESES, INPUT OUTPUT PROCESSING, PROBLEM SOLVING, FORTRAN, SOLUTIONS(GENERAL), JET FIGHTERS, NUMERICAL METHODS AND PROCEDURES, SUBROUTINES, PLOTTING.

Subject Categories : Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE