Date of Award
Master of Science
Department of Aeronautics and Astronautics
D. Brett Ridgely, PhD
Robert A. Canfield, PhD
This study improved the numerical optimization technique used to compute mixed H2/H∞ controllers. The run time to generate the full curve of an H2/H∞ design was reduced by a factor of almost 200 for a specific example. This was accomplished by improving gradient calculations, upgrading the H∞ 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∞ controller for both these examples are compared to previous controller designs created using the LQG/LTR technique.
DTIC Accession Number
Smith, Linda D., "Improved Numerical Solution of Mixed H2/H∞ Optimization with Applications" (1994). Theses and Dissertations. 6354.