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Parameter-dependent vibration-attenuation controller design for electro-hydraulic actuated linear structural systems
Authors:Falu Weng  Weijie Mao
Institution:1. State Key Lab of Industrial Control Technology, Institute of Cyber-Systems and Control, Zhejiang University, Hangzhou, 310027, China
2. School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China
Abstract:The problem of robust active vibration control for a class of electro-hydraulic actuated structural systems with time-delay in the control input channel and parameter uncertainties appearing in all the mass, damping and stiffness matrices is investigated in this paper. First, by introducing a linear varying parameter, the nonlinear system is described as a linear parameter varying (LPV) model. Second, based on this LPV model, an LMI-based condition for the system to be asymptotically stabilized is deduced. By solving these LMIs, a parameter-dependent controller is established for the closedloop system to be stable with a prescribed level of disturbance attenuation. The condition is also extended to the uncertain case. Finally, some numerical simulations demonstrate the satisfying performance of the proposed controller.
Keywords:structural system  electro-hydraulic servo system  robust stabilization  vibration attenuation  parameterdependent controller
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