Modeling and vibration decoupling control of multi-axial shaking table
- DOI
- 10.2991/iiicec-15.2015.409How to use a DOI?
- Keywords
- electro-hydraulic shake table; waveform replication; decoupling control; frequency response function matrix; singular value decomposition
- Abstract
Traditional control strategy study of the multi-axial electro-hydraulic shaking table(MAEHST) is based on linear model, ignoring the coupling and nonlinearity factors, which results in the waveform distortion and the control precision. To overcome these limitations, a model considering the hydraulic system nonlinearity and mechanical coupling using the software Simulink/SimMechanics is built. A vibration decoupling control strategy based on multiple input multiple output (MIMO) system identification is proposed to improve the waveform replication precision. The proposed control method applies the MIMO H1 estimator to identify frequency response function matrix (FRFM) of the system, not only considering the diagonal element, but the off-diagonal element to acquire the coupling characteristics of six degrees of freedom (DOFs) of MAEHST. And then the inverse frequency response function matrix (IFRFM) is calculated using the singular value decomposition technique to obtain the drive signal combined with the reference signal. Simulation experiments are carried out, and the results indicate that the MIMO vibration decoupling control strategy successfully minimizes the coupling and improve the waveform replication precision of the shaking table.
- Copyright
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Lianpeng Zhang AU - Zhidong Yang AU - Zhiyong Qu AU - Junwei Han PY - 2015/03 DA - 2015/03 TI - Modeling and vibration decoupling control of multi-axial shaking table BT - Proceedings of the 2015 International Industrial Informatics and Computer Engineering Conference PB - Atlantis Press SP - 1878 EP - 1883 SN - 2352-538X UR - https://doi.org/10.2991/iiicec-15.2015.409 DO - 10.2991/iiicec-15.2015.409 ID - Zhang2015/03 ER -