Active flutter suppression of nonlinear fin-actuator system via inverse system and immersion and invariance method

作     者：Jin LU Zhigang WU Chao YANG Jin LU;Zhigang WU;Chao YANG

作者机构：Chinese Aeronautical EstablishmentBeijing 100029China School of Aeronautic Science and EngineeringBeihang UniversityBeijing 100191China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2024年第37卷第4期

页      面：343-362页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

主　　题：Aeroelasticity Active flutter suppression Fin-actuator system Freeplay Inverse system Immersion and invariance 

摘      要：Structural nonlinearities such as freeplay will affect the stability and even flight safety of the fin-actuator *** is a lack of a practical method for designing Active Flutter Suppression (AFS) control laws for nonlinear fin-actuator systems.A design method for the AFS controller of the nonlinear all-movable fin-electromechanical actuator system is established by combining the inverse system and the Immersion and Invariance (I&I) ***,the composite control law combining the inverse system principle and internal model control is used to offset the nonlinearity and dynamics of the actuator,so that its driving torque can follow the ideal ***,the ideal torque of the actuator is designed employing the I&I *** unfavorable oscillation of the fin is suppressed by making the output torque of the actuator track the ideal *** simulation results reveal that the proposed AFS method can increase the flutter speed of the nonlinear finactuator system with freeplay,and a set of controller parameters is also applicable for wider freeplay within a certain *** power required for the actuator does not exceed the power that can be provided by the commonly used aviation *** method can also resist a certain level of noise and external disturbance.