飞机液压刹车系统的自激振动分析与抑制  

Analysis and Suppression for Self-excited Vibration of Aircraft Hydraulic Braking System

作　　者：徐远志 焦宗夏[1,2,3] 冯昊[1] 谢彦 杨重阳[1] 谢作建 刘泽华 金瑶兰 孟少康 XU Yuanzhi;JIAO Zongxia;FENG Hao;XIE Yan;YANG Chongyang;XIE Zuojian;LIU Zehua;JIN Yaolan;MENG Shaokang(School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191;Key Laboratory of Advanced Airborne Systems,Beihang University,Beijing 100191;Ningbo Institute of Technology,Beihang University,Ningbo 315800;The First Aircraft Institute,Aviation Industry Corporation of China,Xi'an 710089;Shanghai Hunter Hydraulic Control Technology Co.Ltd.,Shanghai 201612)

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191 [2]北京航空航天大学先进航空机载系统工业和信息化部重点实验室,北京100191 [3]北京航空航天大学宁波创新研究院,宁波315800 [4]航空工业第一飞机设计研究院,西安710089 [5]上海衡拓液压控制技术有限公司,上海201612

出　　处：《机械工程学报》2024年第16期200-208,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51975025,51890822);中国科协青年人才托举工程(2016QNRC001)资助项目。

摘　　要：飞机液压刹车系统为压力控制系统,采用压力伺服阀将刹车指令转化为对应的输出压力,驱动刹车作动器进行刹车。某型飞机刹车系统遇到压力振荡问题,存在周期性的压力波动,严重影响刹车系统的控制性能。建立飞机液压刹车系统数学模型,开展振动原理分析,提出振动机理为一种含有正反馈的阀-管路系统非线性自激振动。采用龙格库塔法对建立的微分方程数学模型求解计算,得到相轨迹为稳定的极限环,即自激振动。提出增大回油容腔和取消回油反馈两种抑制方法,基于AMESim软件进行仿真分析,并开展了试验验证,证明自激振动理论的正确性和抑制方法的有效性。提出的理论方法,可分析和判别压力伺服阀的自激振动风险,对飞机液压刹车系统设计具有良好的指导意义。The aircraft hydraulic braking system is a pressure control system,which utilises a pressure servo valve to delivery the pressure proportional to the input control signal.The pressure oscillation problem encountered has periodic fluctuations,which significantly reduces the control performance of the braking system.The mathematical model of the system is derived,and the vibration is analysed.It is pointed out that the sustainable oscillation is a self-excited vibration of valve-pipe system,which is actually a nonlinear dynamic process with positive feedback.The established ordinary differential equations are solved with Runge-kutta,and the lotus of limit circle is obtained indicating the self-excited vibration.Two suppression methods,increasing the return chamber’s volume and removing the return pressure feedback passage,are proposed.The AMESim software is used to build system’s model,and suppression methods are investigated by the simulation.Experiments are carried out to validate the self-excited vibration and the suppression schemes.The experimental results show that the vibration is eliminated by the suppression methods,indicating their effectiveness.The proposed theory can be used to analyse and recognise the self-excited vibration of pressure servo-valve,and is beneficial for the design of aircraft hydraulic brake systems.

关 键 词：液压刹车系统 压力伺服阀 正反馈 自激振动 

分 类 号：TH137[机械工程—机械制造及自动化]