Aircraft nonlinear optimal control using fuzzy gain scheduling

4th AEROTECH- Innovation in Aerospace Engineering and Technology

航空航天工程

Nusyirwan, I.F.^1 ; Kung, Z.Y.^1

Department of Aeronautics, Automotive and Ocean Engineering, Universiti Teknologi Malaysia, Malaysia^1

关键词: Augmented systems;    Fuzzy gain scheduling;    Near-optimal control;    Non-linear optimal control;    Nonlinear characteristics;    Nonlinear flight controls;    Nonlinear regions;    Optimal control gain;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/152/1/012020/pdf
DOI  :  10.1088/1757-899X/152/1/012020

学科分类：航空航天科学

来源: IOP

【 摘 要 】

Fuzzy gain scheduling is a common solution for nonlinear flight control. The highly nonlinear region of flight dynamics is determined throughout the examination of eigenvalues and the irregular pattern of root locus plots that show the nonlinear characteristic. By using the optimal control for command tracking, the pitch rate stability augmented system is constructed and the longitudinal flight control system is established. The outputs of optimal control for 21 linear systems are fed into the fuzzy gain scheduler. This research explores the capability in using both optimal control and fuzzy gain scheduling to improve the efficiency in finding the optimal control gains and to achieve Level 1 flying qualities. The numerical simulation work is carried out to determine the effectiveness and performance of the entire flight control system. The simulation results show that the fuzzy gain scheduling technique is able to perform in real time to find near optimal control law in various flying conditions.