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针对直升机应急状态下特殊快速响应需求,基于涡轮放气原理,提出了一种新的应急状态快速响应控制方法.在应急状态下,除了燃油控制外,同时将涡轮放气量作为发动机控制变量,采用多变量鲁棒方法设计了应急状态直升机/涡轴发动机三变量快速响应控制器,该综合控制方法不仅实现了直升机垂飞通道的控制,而且在保持输出功率通道稳定,即自由涡轮转速恒定的前提下,借助于涡轮放气实现了燃气涡轮转速的闭环控制,有效实现了发动机功率快速跟随能力.最后,以直升机UH-60/涡轴发动机T700综合模型为对象,仿真验证了在直升机应急状态急升-急降过程中,直升机垂飞速度、发动机自由涡轮转速以及燃气涡轮转速跟踪指令的情况,结果表明:相比传统的PID(proportional integration differential)控制,基于快速响应控制方法建立的闭环系统响应迅速,动静态品质良好,能够达到直升机应急状态的特殊设计要求.
Aiming at the special rapid response requirement under helicopter emergency condition, a new rapid response control method for emergency response is proposed based on the principle of turbine deflation.Under the condition of emergency, in addition to the fuel control, the turbine deflation amount is taken as the engine control variable The multivariable robust method is used to design a three-variable rapid response controller for a helicopter / turboshaft engine in a state of emergency. The integrated control method not only realizes the control of the helicopter vertical flight path, but also maintains the stable output power channel, that is, the premise of constant free turbine speed , The closed-loop control of gas turbine speed is realized by means of turbine deflation, and the ability of engine power to quickly follow is achieved.Finally, the T700 integrated model of helicopter UH-60 / turboshaft engine is taken as an object to simulate the helicopter emergency status The results show that the closed-loop system response based on fast response control method is better than the conventional proportional integration differential (PID) control Quick, dynamic and static good quality, able to reach straight Special features of the machine state of emergency.