拦截弹的鲁棒切换跟踪控制

Robust Switching Tracking Control for the Interceptor

针对临近空间拦截弹的控制问题,提出了一种基于干扰观测器的鲁棒切换跟踪控制设计方法。首先,基于雅克比线性化和张量积(T-P)模型转换方法构建拦截弹的快慢回路多胞型线性变参(LPV)模型。接着,设计干扰观测器估计系统干扰,同时基于干扰估计值设计干扰补偿器消除系统干扰的影响;进一步设计快慢回路鲁棒切换控制器保证闭环系统稳定,获取虚拟控制力矩。然后,利用动态控制分配技术将前面获取的期望控制力矩分配到实际执行机构。最后,仿真结果表明所设计的复合控制系统能够精确跟踪参考指令。

A robust switching tracking control method based on the disturbance obsetvor is proposed for the interceptor with aerodynamic fins and reaction jets. Firstly, a slow - fast loop polytopic linelr parameter varying （LPV） model was constructed to represent the interceptor system based on the Jacobian linearization and Tensor - Product （ T -P） model transformation approach. Then, a disturbance observer was constructed to estimate the system disturbance, and a disturbance compensator was also designed to effectively remove the influence of disturbance. Furthermore, the slow -fast loop robust switching tracking controller was developed to ensure the stability of the closed - loop system and obtain the virtual control moment. Moreover, a dynamic control allocation method was proposed to distribute the above control moment among the corresponding actuators. Finally, simulation results illustrate that the proposed control scheme can accurately track the reference command.