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A New Approach For Acceleration Tracking of Shake Tables Using Combined Acceleration and Force Feedback Control

机译:一种新方法,用于使用组合加速度和力反馈控制进行摇动表的加速跟踪

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This presentation introduces a new acceleration control method for shake tables that provides high-performance and robustness. Unlike the conventional displacement feedback control that is used in most servo hydraulic shake tables, the proposed control method adopts direct acceleration feedback control. While acceleration feedback is not practically employed due to stability issues associated with table drift, the proposed method allows the use of acceleration feedback by adding force feedback loop for stabilization. In this study, controllers for the acceleration and force feedback loops are designed using loop shaping techniques incorporating control-structure interaction. The proposed control method was experimentally investigated at the Johns Hopkins University under two loading conditions: without payload and with payload close to the capacity of the shake table. Experimental results showed that the proposed acceleration control method combining acceleration and force feedback provides better acceleration tracking and wider controllable frequency range than the conventional displacement feedback control in both loading conditions. This presentation will cover basic theory of the proposed method, experimental results, and requirements to upgrade existing shake tables with the proposed control method.
机译:此演示介绍了一种新的加速控制方法,用于提供高性能和稳健性的抖动表。与大多数伺服液压抖动表中使用的传统位移反馈控制不同,所提出的控制方法采用直接加速度反馈控制。虽然由于与表漂移相关的稳定性问题而不是实际采用加速反馈,但是该方法允许通过添加力反馈回路来使用加速反馈来稳定。在该研究中,使用包含控制结构交互的环形成形技术设计了加速度和力反馈环路的控制器。在Johns Hopkins University在两个装载条件下实验研究了所提出的控制方法:没有有效载荷,并且有效载荷接近摇动表的容量。实验结果表明,所提出的加速度控制方法组合加速度和力反馈提供更好的加速跟踪和更宽可控的频率范围,而不是传统的位移反馈控制。本演示文稿将涵盖拟议的方法,实验结果和要求的基本理论,以利用所提出的控制方法升级现有摇动表。

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