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针对含有不确定干扰项的吸气式高超声速飞行器模型,分别设计了基于反馈线性化的速度控制器和基于反步法的航迹控制器,以实现对速度和航迹角参考信号的稳定跟踪。通过指令滤波器得到俯仰角的实际跟踪指令及其一阶、二阶微分信号,可直接设计升降舵控制指令,在解决了虚拟控制量求导“复杂性爆炸”问题的同时,减少了反推计算步数,从而达到提高系统动态性能和优化控制器结构的目的。基于LaSalle不变集原理和Lyapunov理论设计的自适应更新律保证了系统的稳定性。仿真结果表明,所设计的控制器在飞行器存在不确定干扰的情况下仍能满足对参考信号跟踪性能的要求。
In this paper, a speed controller based on feedback linearization and a track controller based on backstepping are designed respectively for the air-breathing hypersonic vehicle model with uncertain perturbation to realize stable tracking of the reference signals of speed and track angle . Through the command filter to get the pitch angle of the actual tracking command and its first-order, second-order differential signal, the elevator control instructions can be directly designed to solve the virtual control of the derivative “complex explosion ” problem, while reducing the anti Push the calculation of the number of steps, so as to achieve the purpose of improving the system dynamic performance and optimizing the controller structure. The adaptive updating law based on LaSalle invariant set theory and Lyapunov theory ensures the stability of the system. The simulation results show that the designed controller can meet the tracking performance of the reference signal even in the presence of uncertainties in the aircraft.