CAJ | 학술논문

针对吸气式高超声速飞行器参数不确定弹性体模型，仅考虑速度、高度和俯仰角速度可测的情况，提出了一种基于状态重构的鲁棒反演控制器设计方法。首先，将被控对象模型表示为严格反馈形式，分别采用动态逆和反演设计实际控制律和虚拟控制律；其次，引入反正切跟踪微分器来简化虚拟控制律求导运算，并用于对弹道角和攻角进行状态重构；最后，为了保证反演控制器的鲁棒性，基于非线性?线性跟踪微分器，设计了一种新型非线性干扰观测器，可实现对模型不确定项的精确估计和补偿。仿真结果表明，所提策略取得了较高的状态重构精度，控制器能够克服模型不确定项的影响，且能保证速度和高度对参考输入的稳定跟踪。
침대흡기식고초성속비행기삼수불학정탄성체모형，부고필속도、고도화부앙각속도가측적정황，제출료일충기우상태중구적로봉반연공제기설계방법。수선，장피공대상모형표시위엄격반궤형식，분별채용동태역화반연설계실제공제률화허의공제률；기차，인입반정절근종미분기래간화허의공제률구도운산，병용우대탄도각화공각진행상태중구；최후，위료보증반연공제기적로봉성，기우비선성?선성근종미분기，설계료일충신형비선성간우관측기，가실현대모형불학정항적정학고계화보상。방진결과표명，소제책략취득료교고적상태중구정도，공제기능구극복모형불학정항적영향，차능보증속도화고도대삼고수입적은정근종。
A robust backstepping controller was designed based on state reconstruction for flexible air?breathing hypersonic ve?hicles considering that only the velocity,altitude and pitch rate were observable. Firstly,the controlled plant was rewritten as a strict feedback form,and the actual control laws and virtual control laws were designed based on dynamic inversion and backstepping re?spectively. Secondly,arctangent tracking differentiator was introduced to estimate the derivatives of virtual control laws and recon?struct the states of flight?path angle and angle of attack.Finally,in order to guarantee the backstepping controller'robustness,a new nonlinear disturbance observer was designed based on nonlinear?linear tracking differentiator to estimate and compensate uncertain?ties of the model precisely.Simulation results show that a high precise state construction can be obtained by the proposed strategy and the presented control methodology can provide a stable altitude and velocity tracking,and eliminate the influence of the uncer?tainties of the model.