Electro-hydraulic servo control system with coupling between vibration and force lording
SHEN Gang
LI Ge
HOU Dong-dong
ZHU Zhen-cai
LI Xiang
Abstract：An electro-hydraulic servo system with coupling between vibration and force loading has the advantage of simulating dynamic performance of the test specimen subjected to simultaneously vibration and force loading. In order to compensate a surplus force disturbance caused by active motion of the electro-hydraulic system with shaking table and force simulator, a disturbance observer is proposed to improve the force loading tracking performance. First, a mathematical simulation model of the electro-hydraulic servo system with coupling between vibration excitation and force loading is established. Then, a recursive extended-least squares algorithm is employed to identify the transfer function of the force closed-loop system, and a zero phase error compensation technology is employed to design the inverse model of the force loading closed-loop system, based on which the disturbance observer is designed. Simulation and experimental results were carried out using the electro-hydraulic experimental system with shaking table and force loading simulator, and it is verified that the force loading disturbance observer can eliminate the surplus force caused by the coupling between vibration and force loading.
Keywords：electro-hydraulic servo controlcoupling between vibration and force loadingdisturbance observerfeed-forward inverse modeltransfer function identification
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 921-930 )