针对高超声速飞行器的非线性动态逆最优控制

Nonlinear Dynamics Inversion Optimal Control for Hypersonic Vehicle

高超声速飞行器具有高度非线性,并且输入输出之间存有耦合。传统控制方案中的线性化处理方法有严重的局限性。采用状态反馈线性化方法对高超声速飞行器纵向模型输入输出线性化,并结合最优控制理论设计控制系统,以求提供满意的非线性解耦控制能力,维持良好的纵向稳定性能。基于某常用的高超声速飞行器模型的仿真研究表明该方案能够使飞行器有效跟踪参考轨迹,满足系统需要。

Hypersonic aircrafts have a highly nonlinear dynamics and input/output coupling.Conventional control scheme of linearization method has serious limitations.In order to provide satisfactory nonlinear decoupling ability and maintain good longitudinal stability,a kind of condition feedback linearization method is adopted in this paper to linearize the input and output of a hypersonic longitudinal vehicle model and optimal control theory is considered in the controller designing.Simulation based on an existing hypersonic vehicle model shows that the controller successfully tracks the reference trajectories and meets the system need.