Date of Award
12-1992
Document Type
Thesis
Degree Name
Master of Science
Department
Department of Aeronautics and Astronautics
First Advisor
D. Brett Ridgely, PhD
Abstract
LQG/LTR design has a tendency to invert the plant's dynamics, which is undesirable if there are plant poles near the imaginary axis. In this study, Static Output Feedback (SOF) is applied to reassign plant poles before LQG/LTR is applied. Alternatively, Robust Eigenstructure Assignment (REA) was used to design the target loop transfer function with an ideal eigenstructure to avoid the undesirable cancellations. Both methods were applied to several aircraft design problems. Results showed that the methods can be effectively used so that the LQG/LTR design has improved stability and performance; however, it was found that each method had strengths and weaknesses.
AFIT Designator
AFIT-GAE-ENY-92D-14
DTIC Accession Number
ADA258841
Recommended Citation
Ju, An-Chi, "Improvements to LQGI/LTR Methodology for Plants with Lightly Damped or Low Frequency Poles" (1992). Theses and Dissertations. 7064.
https://scholar.afit.edu/etd/7064
Comments
The author's Vita page is omitted.