电液伺服疲劳试验机负载刚度自适应模型研究  

Research on Load Rigidity Adaptive Model of Electro-Hydraulic Servo Fatigue Testing Machine

作　　者：张福波[1] 王贵桥[1] 杜林秀[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110004

出　　处：《振动．测试与诊断》2007年第1期16-19,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:50527402)

摘　　要：为了克服试件刚度不同对电液伺服疲劳试验机控制效果的影响,控制试件在低频周期性负荷下振动,根据系统负荷及位移的峰谷值,由刚度定义计算试件刚度,并通过对试件刚度与PID控制器参数最优设定值之间关系的研究,提出根据实测试件刚度修正PID控制器参数中比例系数的单参数自适应控制方案。该方案实施简单、计算量小,在试件刚度较小时,表现出较常规PID控制器更为优良的动态响应特性,尤其适用于电液伺服疲劳试验机这类对算法计算时间要求较苛刻的控制场合。In order to overcome the influence of different specimen rigidity on electro-hydraulic servo fatigue machine's control result,the specimen is controlled to vibrate under low-frequency periodical loads,and the specimen rigidity is calculated based on the peak-valley values of load and displacement.Then a single parameter adaptive control scheme by correcting the proportional coefficient of PID controller according to the field measured specimen rigidity is brought forward.Besides low computational efforts and simple implements,the scheme gets better dynamic response than common PID controller when specimen rigidity is small.And it is especially suitable for control occasions like an electro-hydraulic servo fatigue machine having rigorous requirements for the computing time.

关 键 词：力控制系统 疲劳试验机 负载刚度 自适应控制 

分 类 号：TH871[机械工程—仪器科学与技术]