摘要
飞机液压刹车系统在工作过程中,通过电液压力伺服阀进行防滑刹车压力控制,采用液压管路将刹车压力传输到刹车作动装置上,其为一个复杂的机电液耦合控制系统。液压作动防滑刹车系统在运行过程中极易诱发系统压力振动,从而引起液压管路产生耦合振动,严重时会导致液压油泄漏和起火等事故。本文通过建立防滑刹车系统仿真模型,对耦合压力振动进行分析与仿真,揭示了系统压力振动是由于刹车阀存在自激振荡的机理。通过AMESim仿真,验证了该理论的正确性。通过改变回油管路的长度、直径,回油背压的大小和刹车管路的长度,进行刹车系统振动影响分析,阐明液压管路特性与刹车压力振动的关系。
In the working process of aircraft hydraulic braking system,the anti-skid braking pressure is controlled by electro-hydraulic pressure servo valve,and the braking pressure is transmitted to the brake actuator by hydraulic pipeline.The hydraulic braking system is a complicated electro-hydraulic coupling control system,which can easily induce the pressure vibration of the system in the course of operation,and cause the coupling vibration of the hydraulic pipeline.In serious conditions,it will lead to accidents such as hydraulic oil leakage and fire.The simulation model of anti-skid braking system is established in the paper to analyze and simulate the coupling pressure vibration.It is revealed that the pressure vibration of the system is due to the self-excitation vibration of the brake valve,and the correctness of the theory is verified by AMESim simulation.By changing the length and diameter of the oil return line,the size of oil return back pressure and the length of brake line,the influences of the brake system vibration are analyzed,and the relationship between the characteristics of the hydraulic line and brake pressure vibration is clarified.
作者
李洋
Li Yang(The Sixth Military Representative Office of the Naval Armament Department,Xi'an 710089,Shaanxi,China)
出处
《工程与试验》
2022年第2期39-42,共4页
Engineering and Test
关键词
防滑刹车系统
压力振动
抑制技术
anti-skid braking system
pressure vibration
suppression technology
