伺服阀对地震模拟振动台控制性能影响及控制参数自整定

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英文篇名：Effect of Servo Value on Shaking Table Control Performance and Auto-Tuning of Control Parameters 中文刊名：震灾防御技术 英文刊名：Technology for Earthquake Disaster Prevention 作者：唐贞云 ; 李振宝 ; 纪金豹 ; 马华 英文作者：Tang Zhenyun ; Li Zhenbao and Ji Jinbao(Beijing Laboratory of Engineering and Structural Retrofit ; Beijing University of Technology ; Beijing 100124 ; China) 中文关键词：地震模拟振动台 ; 物理系统 ; 伺服阀 ; 前馈修正 英文关键词：Shaking table ; Physical system ; Servo valve ; Feed forward compensation 出版日期：2010-03-15 机构：北京工业大学工程抗震与结构诊治北京市重点实验室; 年：2010 期：01 出版单位：震灾防御技术

摘要

振动台控制系统设计时对物理系统进行了两个基本假设:伺服阀线性、台面和负载刚性。这样得到的控制系统频带较窄、时滞大,还有可能出现控制系统不稳定。本文通过系统建模,主要分析了伺服阀对振动台控制性能的影响:伺服阀频率特性限制了其控制精度。设计了前馈补偿环节、控制系统参数自整定算法修正系统控制性能,实例仿真结果表明:修正后的算法扩宽了系统频带,提高了地震记录的再现精度。
Currently,the design of shaking table control system is based on two assumptions,i.e.linear servo valve,and rigid table and payloads.Such assumptions sometimes may result in narrow frequency band,large time delay and unstable system.In this paper,effect of servo valve on shaking table control performance is analyzed through establishing system model.The results show that the frequency response characteristic of servo valve limits the control accuracy of shaking table.Feed forward compensation,auto-tuning algorithm of control parameters are designed to modify the system control system.The simulation results indicate that correction algorithm improves the frequency band and the reproduction precision of seismic records.

引文

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