Adaptive inverse control of time waveform replication for electrohydraulic shaking table
Adaptive inverse control of time waveform replication for electrohydraulic shaking table
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DOI：
10.1177/1077546310380431
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发表时间：
2011-10
影响因子：
2.8
通讯作者：
Gang Shen;S. Zheng;Zhengmao Ye;Qitao Huang;D. Cong;Junwei Han
中科院分区：
文献类型：
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作者：
Gang Shen;S. Zheng;Zhengmao Ye;Qitao Huang;D. Cong;Junwei Han
针对电液振动台系统，提出了一种自适应逆控制（AIC）和逆频率响应函数（IFRF）均衡技术相结合的控制策略。控制的目的是提高时间波形复制的精度。与工业EST控制器的通过重复激励控制的迭代补偿方法相比，所提出的控制策略利用EST系统的IFRF来扩展EST系统的频率带宽并获得渐近参考跟踪，并采用可变抽头长度滤波x最小均方算法来自适应地调整时间，域驱动信号，进一步提高EST系统的位置和加速度跟踪性能。因此，所提出的组合控制策略被设计为联合收割机结合IFRF和AIC的优点。在MATLAB/Simulink环境下编写了控制策略的程序，并用Microsoft Visual Studio.NET编译到实时PC机上实现。仿真和实验结果表明，该控制策略能获得满意的位置和加速度波形复制精度。
A combined control strategy with an adaptive inverse control (AIC) and an inverse frequency response function (IFRF) equalization technique is proposed for the electrohydraulic shaking table (EST) system. The control purpose is to improve the accuracy of time waveform replication. In contrast to the iterative compensation through repetitive excitations control approach of industrial EST controllers, the proposed control strategy utilizes an IFRF of the EST system for extending the EST system frequency bandwidth and obtaining asymptotic reference tracking, and employs a variable tap-length filtered-x least-mean-squares algorithm to adaptively tune the time-domain drive signal and further improve the position and acceleration tracking performance of the EST system. Thus, the proposed combined control strategy is designed to combine the merits of IFRF and AIC. The procedures of the proposed control strategy are programmed in MATLAB/Simulink, and then compiled to a real-time PC with Microsoft Visual Studio.NET for implementation. The simulated and experimental results show that this control strategy achieves satisfactory position and acceleration waveform replication accuracy.