速度和推力控制律设计

主要介绍了自动油门的工作模式和控制律算法设计。自动油门两种工作模式为:指示空速/马赫数保持和推力控制。其工作模式由自动飞行控制系统的纵向接通模态直接决定。在推力控制模态算法中,发动机目标压力比和现时压力比的差值为主控信号;在速度保持模态算法中,速度差是主控信号。经过调参转换为油门杆指令速率,驱动油门执行机构,伺服电机跟踪转速指令并转换为油门偏转角度,输出给发动机产生相应的推力。以某型飞机为控制对象,进行了数学仿真,仿真结果表明该控制律是可行的并具有良好的应用前景。

The Design of Speed and Thrust Control

The working mode and control law of autothrottle have been presented, which includes two working modes, IAS/Mach hold and thrust control. And the working modes are depended on the pitch modes of auto flight control system. For thrust control algorithm, it sets the error between target engine pressure ratio and current engine pressure ratio as main control signal, For speed hold algorithm, the difference of speed is the main control signal. By adjusting parameters, the main control signal convert to throttle lever speed command. The servo motor track speed command, and throttle deflection angle making the corresponding engine thrust. Mathe-matical simulation of this control law has been done based on a certain type of aircraft. The results show that the control law is viable, and has a good application prospect.