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直升机飞行控制的设计目标在于满足飞行品质要求的同时,应保证直升机具备较高的可靠性、可用性、部件耐久性以及可维护性。给出了黑鹰UH-60直升机前飞状态下的模型跟踪控制方法,同时考虑了关键部件的结构寿命,实现了直升机的姿态和高度控制,并且有效地权衡了飞行品质以及结构寿命。该模型跟踪控制系统由疲劳损伤和飞行速度两个参数调度。疲劳损伤是旋翼轴弯矩所产生的裂纹长度,表征了旋翼轴的结构寿命。非线性仿真结果表明,直升机系统解耦控制特性良好,能够跟踪指定输入,并且飞行控制系统动态性能的轻微下降能够显著提高结构寿命。
Helicopter flight control is designed to meet the requirements of flight quality while maintaining high reliability, availability, component durability and maintainability of the helicopter. The model tracking control method of the Black Hawk UH-60 helicopter in the pre-flight state is given. The structure life of the key components is taken into account. The helicopter’s attitude and altitude control are achieved. The flight quality and the structure life are effectively weighed. The model tracking control system is composed of two parameters of fatigue damage and flight velocity. Fatigue damage is the crack length produced by the bending moment of the rotor shaft, which indicates the structural life of the rotor shaft. The nonlinear simulation results show that the helicopter system decoupling control characteristics are good, can track the specified input, and the slight decrease of the dynamic performance of the flight control system can significantly improve the structure life.