飞机液压系统压力脉冲试验波形控制

 介绍了一种用于航空液压系统管路与元件压力脉冲试验的设备,建立了试验系统的压力瞬态模型,分析了影响脉冲波形的因素,给出了梯形波和水锤波的控制方法。对于梯形波可采用实际波形跟踪理想输入波形的闭环控制方式,对于水锤波则需要利用水锤现象,并自动调节比例节流阀来控制波形的峰值、斜率等特征参数,以满足规范要求。论文给出了仿真和试验结果。

Controlled Pressure Pulses for Testing Hydraulic Pipes and Components of Aircrafts

A hydraulic pressure pulse equipment that can generate water hammer and trapezium-shaped wave fortesting hydraulic pipes and components of aircrafts is introduced. The mathematical models of the pressure transientstate of the pipes and components, such as the accumulator, the proportion valve, the supercharger etc., have beendeveloped and used to analyse the factors that affect the pulse parameters. The control method of the trapeziumshaped wave and the water hammer wave is also discussed. The closed-loop control to trail ideal waveform with actual pressure can be used to produce trapezium2shaped wave. By making use of water hammer phenomenon and regulating the proportion valves automatically, water hammer waves can be produced, and the feature parameters of thewaveform, such as the slope and the peak value etc., can be controlled. The simulation and test results are presented.