Title :
Nonlinear longitudinal axis regulation of F-18 HARV using feedback linearization and LQR
Author :
Fer, Haken ; Enns, Dale F.
Author_Institution :
Minnesota Univ., Minneapolis, MN, USA
Abstract :
The objective of this study is to combine a feedback linearization technique with the linear quadratic regulator (LQR) to design nonlinear regulation laws with locally optimal LQ full state feedback properties for a longitudinal axis model of F-18 HARV. The idea is realized by designing a nonlinear regulation law using feedback linearization, and then computing the feedback gains of the input in transformed coordinates from the loop shaped LQR designs in physical coordinates at equilibrium points. Frequency domain analysis and nonlinear simulations show that the closed loop system has both guaranteed stability and robustness properties, in terms of gain and phase margins of LQR at the input, and satisfactory transient response
Keywords :
aircraft control; control system synthesis; frequency-domain analysis; linear quadratic control; linearisation techniques; nonlinear control systems; robust control; state feedback; transient response; F-18 HARV; LQR; closed loop system; feedback gains; feedback linearization; frequency domain analysis; gain margins; guaranteed robustness; guaranteed stability; linear quadratic regulator; locally optimal LQ full state feedback properties; nonlinear longitudinal axis regulation; nonlinear regulation laws; nonlinear simulations; phase margins; transient response; Analytical models; Closed loop systems; Computational modeling; Feedback loop; Frequency domain analysis; Linearization techniques; Physics computing; Regulators; Robust stability; State feedback;
Conference_Titel :
Decision and Control, 1997., Proceedings of the 36th IEEE Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4187-2
DOI :
10.1109/CDC.1997.649488
