液压振动台非线性摩擦力测量与参数辨识

发布时间：2018-01-05 18:25

本文关键词：液压振动台非线性摩擦力测量与参数辨识　出处：《振动.测试与诊断》2017年04期 　论文类型：期刊论文

【摘要】：电液伺服振动试验系统低速和换向时的非线性摩擦力测量和补偿是提高运输环境试验和地震模拟试验等控制精度的重要途径。为了定量获取液压振动台的非线性摩擦力,基于Stribeck效应建立了改进的电液伺服振动试验系统非线性摩擦力理论模型,并结合液压振动台的力平衡方程建立了非线性摩擦力待辨识参数的目标函数。提出一种基于位移闭环控制的简便方法对不同速度下的液压振动台油缸压力差进行测量,得到振动台液压缸与活塞杆之间的摩擦力随速度变化的数值规律。采用基于拟随机序列的混合遗传算法对非线性摩擦力理论模型的4个参数进行了辨识。试验结果证明了本研究方法的可行性,为液压振动试验系统加速度波形失真补偿提供了一定参考。
[Abstract]:The test system of electric hydraulic servo vibration speed and nonlinear friction force measurement and compensation of commutation is an important way to improve transportation environment test and earthquake simulation test control precision. In order to obtain quantitative nonlinear friction force of the hydraulic vibration table, the electric hydraulic servo system with friction nonlinear vibration test improved theoretical model is built based on the Stribeck effect, and the establishment of the target function parameters with nonlinear friction force balance equation of the hydraulic vibration table is presented. A simple method of displacement closed-loop control based on hydraulic vibration cylinder pressure under different velocity difference measurement, numerical rules friction cylinder and piston rod between the hydraulic vibration table with the speed of change. The hybrid genetic algorithm for quasi random based on the sequence of 4 parameters on the nonlinear friction model are identified. The experimental results prove that The feasibility of this method has provided some reference for the compensation of the distortion of the acceleration waveform in the hydraulic vibration test system.

【作者单位】：中国工程物理研究院总体工程研究所;西安交通大学机械工程学院;
【基金】：中国工程物理研究院科学技术发展基金资助项目(2012B0203022)
【分类号】：TH137
【正文快照】： 引言液压振动试验系统作为武器、装备运输环境或地震模拟的重要试验设备,其性能是制约环境试验控制精度的重要因素之一,尤其是低频段的加速度波形失真与液压振动试验系统中诸如摩擦和流量非线性等因素密切相关[1-3]。笔者在振动环境试验和相关试验设备研制过程中发现,振动台活

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