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针对高超声速滑翔飞行器特殊的气动外形,采用BTT(倾斜转弯)控制进行横向机动。首先进行三通道独立设计,然后加入协调控制支路进行补偿解耦,其中三通道独立设计采用自适应PID方法,控制器参数随飞行高度和速度的变化而变化。在分析系统交连耦合程度的基础上提出了按交连耦合项系数大小进行补偿的方法,并以此方法设计了变增益的协调控制支路来补偿系统的交连耦合。最后通过三自由度非线性仿真对控制方案和控制参数进行检验,仿真结果表明,该方案是正确的,控制参数的选择是合理的,达到了严格控制侧滑角的目的。
For the special aerodynamic profile of hypersonic glide aircraft, BTT (Tilt Bend) control is used for lateral maneuvers. First of all, three-channel independent design is adopted, and then the coordinated control branch is added for compensation and decoupling. Among them, the three-channel independent design adopts the adaptive PID method, and the controller parameters vary with the flight altitude and speed. On the basis of analyzing the degree of cross-coupling of the system, a method of compensating the cross-coupling coefficient is proposed. In this method, a variable-gain coordinated control branch is designed to compensate the cross-coupling of the system. Finally, the three-degree-of-freedom nonlinear simulation is used to test the control scheme and control parameters. The simulation results show that the scheme is correct and the choice of control parameters is reasonable and the control of side-slip angle is achieved.