三自由度加载系统高精度加载控制方法试验研究  

Experimental verification of a high-precision loading control method for a loading system with three degrees of freedom

作　　者：许国山[1,2,3] 郑雪梅[1,2,3] 陈琦 王贞[1,2,3] XU Guoshan;ZHENG Xuemei;CHEN Qi;WANG Zhen(Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin 150090,China;Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090 [2]哈尔滨工业大学土木工程智能防灾减灾工业和信息化部重点实验室,哈尔滨150090 [3]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《振动与冲击》2020年第12期23-31,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51778190,51978213);国家重点研发计划项目(2017YFC0703605,2016YFC0701106);黑龙江省博士后科研启动基金(LBH-Q15059)。

摘　　要：针对三自由度加载系统,对其控制方法进行了较为系统的研究。对现有较为精确的控制方法进行了分析介绍,利用三自由度拟静力试验加载控制软件,在哈尔滨工业大学大型多功能三自由度加载系统上进行了弯剪试验验证,对比分析竖向基于作动器反馈的力-位移混合控制方法,竖向基于LVDT反馈的力-位移混合控制方法和考虑几何非线性的控制方法的准确性。研究结果表明:考虑几何非线性的控制方法对三自由度加载试验的控制最为准确。A control method of a three-degree-of-freedom loading system was systematically studied in this paper.First of all,existing more accurate control methods were analyzed and introduced.Then,the bending and shear test was carried out on a large-scale multi-function three-degree-of-freedom loading system of Harbin Institute of Technology with the three-degree-of-freedom loading control software.The work analyzed the accuracy of the force-displacement mixed control(based on actuator feedback in the vertical direction)method,the force-displacement mixed control(based on LVDT feedback in the vertical direction)method and the force-displacement mixed control method considering the geometric nonlinearity.The result shows that the force-displacement mixed control method considering the geometric nonlinearity is the most accurate for the control of the three-degree-of-freedom loading test.

关 键 词：三自由度加载系统 力-位移混合控制方法 几何非线性 控制软件 拟静力试验 

分 类 号：TU317[建筑科学—结构工程]