基于模型的液力变矩器故障诊断系统的设计与校验*

doi:10.19562/j.chinasae.qcgc.2018.010.018

Abstract

Abstract: Hydraulic torque converter (HTC) is an important component that transfers power from engine to gear transmission. In order to overall monitor the working state of HTC and ensure its reliable operation, by applying the theory of fault diagnosis based on structural analysis (SA), fault diagnosis and identification (FDI) system for HTC is designed to detect and locate all the key faults of HTC. Firstly, based on the analysis of the key faults of HTC, the fault model for HTC is established. Next, by means of Dulmage-Mendelsohn decomposition and fault isolability matrix analysis in SA, the fault detectability and fault isolability of HTC are analyzed, indicating that all the 5 key faults of HTC are detectable and isolatable. Then, through the solving of minimal structurally overdetermined sets and based on the theory of analytic redundant relation, the design of FDI system is fulfilled. Finally, the simulation model for FDI system is set up with MATLAB and a simulation is conducted. The results show that the FDI system can detect and isolate all the preset faults, which is consistent with the results of theoretical analysis using SA

Key words: hydraulic torque converter, fault diagnosis, structural analysis, residual

Chen Qi, Yao Zhigang, Chen Wuwei, Qadeer Ahmed, Zhang Zhen. Design and Verification of Model-based Fault Diagnosis System for Hydraulic Torque Converter[J]., 2018, 40(10): 1246-1254.

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Design and Verification of Model-based Fault Diagnosis System for Hydraulic Torque Converter

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