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Recent Patents on Mechanical Engineering

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ISSN (Print): 2212-7976
ISSN (Online): 1874-477X

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Research Article

Study on Decoupling Control Strategy of Redundant Parallel Hybrid Vibration Isolation Platform

Author(s): Bing Zhang*, Liu Yan, Longtao Qiu, Hua Huang, Jiamin Cai, Xinlong Yang and Shaodong Tang

Volume 15, Issue 3, 2022

Published on: 14 April, 2022

Page: [302 - 318] Pages: 17

DOI: 10.2174/2212797615666220304120326

Price: $65

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Abstract

Background: The Vibration Isolation Platform (VIP) can greatly reduce the risk of damage to dynamic equipment caused by external vibration interference and provide the most stable and reliable working environment for dynamic equipment.

Objective: Aiming at the problems of small vibration isolation dimension, low bearing capacity, serious motion coupling, and narrow vibration isolation bandwidth in the field of vibration isolation of dynamic load equipment, a hydraulic redundant six degrees of freedom parallel vibration isolation platform (PVIP) with active and passive composite vibration isolation support is proposed.

Methods: The dynamic coupling model of active and Passive Hybrid Vibration Isolation (APHVI) of redundant PVIP is established, and the matrix diagonal decoupling control strategy and fuzzy PI control theory are combined. Analysis of passive vibration isolation performance and APHVI performance of VIP is done.

Results: The simulation results show that the effect of APHVI based on fuzzy PI decoupling control is better than that of passive vibration isolation and matrix diagonal decoupling control.

Conclusion: Fuzzy PI control can effectively attenuate more than 98 % of the disturbance, significantly improve the vibration isolation performance and decoupling effect of the platform, and expand the effective vibration isolation bandwidth.

Keywords: Vibration isolation platform, six degrees of freedom, dynamic coupling model, hybrid vibration isolation, decoupling control, fuzzy PI control.

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