Analysis and Experiment of Fluid-structure Coupled Vibration of MFC-actuated Flexible Structure Immersed in Viscous Fluids

doi:10.3901/JME.2021.22.376

Abstract

Abstract: Hydraulic system and electro-mechanical system are widely used in aerospace, industry, non-road mobile machinery and other fields. In practice, the two systems are usually used separately. The electro-mechanical drive scheme has high energy efficiency, but poor carry capacity. The hydraulic drive scheme has high power density and fast dynamic response, but low energy efficiency. Therefore, combining the advantages of the two driving scheme, based on the integration design of the hydraulic cylinder and electro-mechanical actuator, a new type hydraulic-electric hybrid linear drive system is constructed. The working principle of the system is introduced. The coupling characteristics, the force dispute phenomenon and its effects of the two non-similar driving subsystems are analyzed. On this basis, a control scheme that electro-mechanical drive unit controls the system motion and hydraulic drive unit controls force is proposed. The research results show that adopting the proposed control scheme can reduce the coupling effect of two non-similar drive subsystems. By using the proposed control scheme, considerable position control performance can be achieved with low pressure loss. The new hybrid linear drive system will provide new ideas for the further development of hydraulic system and electro-mechanical system.

Key words: underwater flexible structure, fluid-structure coupled, hydrodynamic function, Macro fiber composite(MFC), dynamic model, frequency response

CLC Number:

TP24
TH113

HUANG Juehao, LOU Junqiang, YANG Yiling, CHEN Tehuan, CHEN Hairong, WEI Yanding. Analysis and Experiment of Fluid-structure Coupled Vibration of MFC-actuated Flexible Structure Immersed in Viscous Fluids[J]. Journal of Mechanical Engineering, 2021, 57(22): 376-385.

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