Taking a folding hypersonic morphing vehicle(HMV)as the research object,comprehensively consider-ing dynamic changes caused by the deformation of aerodynamic characteristics and kinetics characteristics,as well as the influence of model uncertainties and external disturbances,the research on vehicle motion modeling and fixed-time prescribed performance control method is carried out.Firstly,the motion model and attitude control model of hypersonic morphing vehicle are established.Then,a fixed-time disturbance observer is established to accurately es-timate the complex disturbance composed of model uncertainties and external disturbances,a novel fixed-time pre-scribed performance function is designed to quantitatively describe the expected performance constraints,the atti-tude controller is designed by integrating the dynamic surface control technique into the prescribed performance control framework,and the fixed-time stability of the closed-loop system is proved by Lyapunov stability theory.Fi-nally,the numerical simulation is carried out to verify the effectiveness and robustness of the proposed method.
关键词
高超声速变外形飞行器/固定时间/预设性能/干扰观测器/动态面控制
Key words
Hypersonic morphing vehicle/fixed-time/prescribed performance/disturbance observer/dynamic sur-face control
维普
万方数据