Fault diagnosis of the sliding plug door drive transmission system based on structural analysis method
To effectively diagnose faults in the sliding plug door drive transmission system,key faults are parameterized and characterized.A fault model of the sliding plug door drive transmission system is established.Using the Dulmage-Mendelsohn(DM)decomposition and fault isolability matrix in structural analysis,it is determined that all three key faults are detectable but not isolable.To achieve fault isolability,three sensor configuration schemes are proposed considering feasibility and cost-effectiveness.Analysis shows that by configuring an armature current sensor,all faults can be detected and isolated.Based on the structurally minimal overdetermined equation set,four sets of residuals are designed using the analytical redundancy method and standard observer.A fault detection and isolation system simulation model is built in MATLAB/Simulink.The simulation outputs of the residuals match the theoretical analysis results,demonstrating that applying the structural analysis method to the fault diagnosis of the sliding plug door drive transmission system is feasible,effective,and accurate.
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