二自由度电液振动台冲击波形再现控制算法研究  

Shock Waveform Replication Control Algorithm for 2-DOF Electro-hydraulic Shaking Table

作　　者：吴智睿 关广丰 熊伟 王海涛 WU Zhi-rui;GUAN Guang-feng;XIONG Wei;WANG Hai-tao(Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian, Liaoning 116000)

机构地区：[1]大连海事大学船舶与海洋工程学院,辽宁大连116000

出　　处：《液压与气动》2020年第8期70-74,共5页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51675073);中央高校基本科研业务费专项资金(3132019352)。

摘　　要：电液振动台是大型结构件冲击环境模拟的关键设备。受负载特性变化等因素的影响,传统控制方法很难保证参考冲击波形的再现精度。提出基于BFGS拟牛顿优化算法更新系统的广义阻抗,通过对伺服控制系统驱动信号的在线修正,减小响应信号与参考信号之间的偏差。分别利用传统算法和BFGS优化算法进行二自由度冲击波再现仿真分析,仿真结果表明,BFGS算法能够实现系统时变阻抗的跟踪,高精度再现参考冲击波形。Electro-hydraulic shaking table is the key equipment to simulate the impact environment of large-scale structurals.Due to the influence of load characteristics,traditional control method is difficult to ensure the reproduction accuracy of reference shock wave.Based on the BFGS quasi-Newton optimization algorithm,the generalized impedance of the system is updated,and the driving signal of the servo control system is modified on line to reduce the deviation between the response signal and the reference signal.The traditional algorithm and the BFGS optimization algorithm are used to simulate and analyze the 2-DOF shock wave replication.The results show that the BFGS algorithm can track the time-varying impedance of the system and achieve high-precision replication of the reference shock waveform.

关 键 词：二自由度电液振动台 冲击振动 波形再现 广义阻抗 BFGS算法 

分 类 号：TH137[机械工程—机械制造及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]