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针对高超声速飞行器飞行包线范围广和模型参数不确定性大的问题,提出了基于间隙度量的鲁棒线性变参数(LPV,Linear Parameter-Varying)控制律设计方法.该方法将间隙度量引入LPV控制器设计中,提出了基于最优间隙度量的凸分解策略,并将其应用于多胞顶点的分解和鲁棒LPV控制器的自增益调参,以降低控制器的保守性;考虑模型的参数不确定性求取多胞LPV系统的顶点模型并设计顶点控制器,以提高顶点边界附近LPV控制器的鲁棒性;以某型高超声速飞行器为对象设计了鲁棒LPV控制器.仿真结果表明:该方法能降低大包线内控制器的保守性,实现高超声速飞行器在整个设计包线内精确的指令跟踪,并且在模型参数存在大的不确定性情况下仍保证系统的鲁棒性能和稳定性.
In order to solve the problem of large flight envelope of hypersonic vehicle and large uncertainty of model parameters, a control law design method of robust linear parameter-varying (LPV) based on gap metric is proposed. The proposed method introduces gap metric into LPV In the controller design, a convex decomposition strategy based on optimal gap metric is proposed and applied to the decomposition of multi-cell vertex and self-gain tuning of robust LPV controller to reduce the conservativeness of the controller. Considering the model Parameters Uncertainty The vertex model of multi-cell LPV system is obtained and the vertex controller is designed to improve the robustness of the LPV controller near the vertex boundary. A robust LPV controller is designed for a hypersonic vehicle. The simulation results It is shown that this method can reduce the conservativeness of the controller in the maze line and realize the precise command tracking of the hypersonic vehicle in the entire design envelope and ensure the robustness of the system under the condition of large uncertainty in the model parameters And stability.