复合材料伺服液压缸精准摩擦特性测试方法研究  

Research on Accurate Friction Characteristics Test Method of Composite Servo Hydraulic Cylinder

作　　者：姜琳琳 于天 李瑶 焦宗夏[1,2,3] 尚耀星 JIANG Linlin;YU Tian;LI Yao;JIAO Zongxia;SHANG Yaoxing(School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191;Science and Technology on Aircraft Control Laboratory,Beihang University,Beijing 100191;Ningbo Institute of Technology,Beihang University,Ningbo 315800;Key Laboratory of Advanced Aircraft Utility Systems,Ministry of Industry and Information Technology,Beihang University,Beijing 100191)

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]北京航空航天大学飞行器控制一体化技术国家级重点实验室,北京100191 [3]北京航空航天大学宁波创新研究院,宁波315800 [4]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

出　　处：《机械工程学报》2024年第16期338-347,共10页Journal of Mechanical Engineering

基　　金：国家重点研发计划资助项目(2018YFB2000702)。

摘　　要：复合材料伺服液压缸是液压缸轻量化的创新解决方案,能否利用其替代传统液压缸,摩擦特性是核心因素之一,它对电液伺服系统的控制精度和动态性能产生影响。传统液压缸摩擦测试一般采用粗放的启动压力测量法,针对新研制的复合材料液压缸,提出一种宽速高效的精准摩擦测试方法。该方法采用对顶拖动原理,向位置拖动缸施加控制指令,使位置拖动缸拖动被测缸进行变速运动,获得被测缸在宽速范围内的摩擦力、速度实测值,然后拟合摩擦力-速度曲线,辨识获得被测液压缸的摩擦特征参数。提出高频段摩擦力-速度特征点标记方法与变步长宽速拖动方法,提升摩擦特性测试精度。搭建碳纤维液压缸摩擦试验台,验证该测试方法的有效性,测试结果指导碳纤维液压缸筒的刚度匹配设计。Composite servo hydraulic cylinder is an innovative solution of hydraulic cylinder weight reduction.Friction characteristics is one of the core factors,which affects the control accuracy and dynamic performance of electro-hydraulic servo system.Traditional hydraulic cylinder friction test adopts imprecise starting pressure measurement method.A wide-speed range and high efficiency precision friction testing method is proposed for a new composite hydraulic cylinder.In this friction test method,the speed of the cylinder under test is driven and controlled by a hydraulic test rig.A friction-velocity feature points marking method and a step size adaption control method are proposed to improve the accuracy of friction characteristic test.The friction-speed relationship curve of the hydraulic cylinder in a wide speed range is obtained.The friction characteristic parameters of the hydraulic cylinder under test are identified by fitting the friction-velocity curve to the Stribeck equation.This friction test method has been applied to a test bench,and the friction characteristics of a carbon fiber hydraulic cylinder has been tested to verify the effectiveness of the test method.

关 键 词：液压传动 伺服液压缸 摩擦特性 复合材料 摩擦测试 

分 类 号：TB332[一般工业技术—材料科学与工程]