两自由度电液振动台随机波形复现控制  

Random Waveform Replication Control of Two-Degree-of-Freedom Electro-Hydraulic Shaking Table

作　　者：王志超 关广丰 熊伟 王海涛 WANG Zhichao;GUAN Guangfeng;XIONG Wei;WANG Haitao(College of Naval Architecture and Ocean Engineering,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学船舶与海洋工程学院,大连116026

出　　处：《组合机床与自动化加工技术》2023年第12期113-116,122,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金项目(51675073)。

摘　　要：在电液振动台传统的波形复现控制算法中,系统频响函数固定不变,而实际振动台控制系统频率特性具有时变性,极大影响波形复现的精度。基于两自由度电液振动台,提出了PSB拟牛顿优化算法对系统广义阻抗矩阵更新,同时基于自适应变步长对伺服控制系统驱动信号实时在线修正,减小了迭代响应信号与参考信号的误差。分别基于DFP定步长优化算法和PSB自适应变步长优化算法设计两自由度随机波形复现控制器。仿真分析及实验研究结果表明,与DFP定步长算法相比,PSB自适应变步长算法具有更快的收敛速度,能够高精度的复现加速度随机波形。In the traditional waveform replication control algorithm of electro-hydraulic shaking table,the system frequency response function(FRF)is fixed and unchanged.The control precision of waveform replication is influenced by the time-varying FRF of the actual system.Based on the two-degree-of-freedom electro-hydraulic shaking table,the PSB quasi-Newton optimization algorithm is used to update the generalized impedance matrix of the system.Based on the adaptive variable-step method,the drive signal of the servo control system is corrected online.The method reduces the error between the response signal and the reference signal.Two-degree-of-freedom random waveform replication controllers are designed based on the DFP fixed-step optimization algorithm and the PSB adaptive variable-step optimization algorithm.The results obtained in simulations and experiments show that the PSB adaptive variable-step algorithm have a faster convergence speed and can achieve high-precision replication of acceleration random waveform compared with the DFP fixed-step algorithm.

关 键 词：两自由度电液振动台 随机振动 波形复现 PSB算法 自适应变步长 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]