基于通用扩张状态观测器的鲁棒飞行控制方法  

Robust flight control based on generalized extended state observer

作　　者：张银辉[1] 杨华波[1] 江振宇[1] 张为华 

机构地区：[1]国防科技大学航天科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2016年第3期94-99,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(51105368)

摘　　要：针对参数不确定、外界干扰与测量噪声情况下飞行控制问题,提出一种基于通用扩张状态观测器的鲁棒飞行控制方法。基于状态相关的Riccati方程控制方法对飞行器俯仰通道非线性模型进行扩展线性化;引入基于通用扩张状态观测器的控制方法,设计干扰补偿增益,实现对外界干扰的估计与补偿;通过在线解算状态相关矩阵及代数黎卡提方程,得出状态反馈增益与干扰补偿增益,实现对飞行器期望攻角的跟踪控制。与已有方法对比表明,所提方法不仅对系统模型不确定性与外界干扰具有较强的鲁棒性,而且在较大测量噪声情况下,其依然能够保证良好的跟踪控制效果,具有较强的工程应用价值。The robust flight control based on the generalized extended state observer was investigated to address the problems of parameter uncertainties,external disturbances and flight control with measurement noise. The nonlinear longitudinal dynamics were transformed into the linear-like structure state-space equations of state-dependent coefficients on the basis of the state-dependent Riccati equation control method.According to the control method based on generalized extended state observer,the disturbance compensation gain was designed to estimate and attenuate the external disturbances. Consequently,the state feedback gain and disturbance compensation gain were derived to track the desired angle of attack by solving the state-dependent coefficients and the algebraic Riccati equation on-line. Compared with other control methods,the proposed approach not only is robust with the parameter uncertainties and external disturbances,but also remains perfect in tracking performance with the measurement noise. It has high engineering application value.

关 键 词：通用扩张状态观测器 状态相关的Riccati方程 鲁棒飞行控制 

分 类 号：V448[航空宇航科学与技术—飞行器设计]