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Affiliation of Author(s):机电学院

Journal:J Vib Shock

Abstract:By introducing an auxiliary angular velocity, dynamic differential equations of a parallel type six-axis accelerator were transferred from second-order nonlinear ones into a group of first-order linear equations fully decoupled. Using the forward kinematics theory of a parallel mechanism, the inherent constraint relations among the system inputs were derived, then the fault diagnosis model of this sensor was built and specific groups of faults being able to be restored were obtained. A concept of fault diagnosis restoring rate was defined to quantize the sensor's recoverability, the sensor's restoring rate was found to be lower. An improved parallel type six-axis accelerator configuration was proposed. According to its fault self-diagnosis model, a fault-judgement equation was concluded and combined with the fault tree analysis, its faults were diagnosed and the troubleshooting schemes for specific fault conditions were provided. The results showed that compared with the original structure, the restoring rate of the parallel type six-axis accelerator increases by 28%. Using the software ADAMS, simulations were done, the results showed that the comprehensive error is less than 6.38% after the fault branch chain is restored; the correctness and feasibility of the proposed fault diagnosis and restoring schemes are verified. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.

ISSN No.:1000-3835

Translation or Not:no

Date of Publication:2017-08-15

Co-author:W00118,You, Jingjing,wy,Yan, Dengdeng

Correspondence Author:lcg