Fault detection algorithm for indicator diagram of automobile shock absorber based on dynamic analysis
To alleviate the radial power deviation caused by flow inertia in automotive shock absorbers,a fault detection algorithm based on dynamic analysis of automotive shock absorber indicator diagram is proposed.Calculate the flow inertia of the shock absorber fluid in the left and right enclosed areas,substitute the radial force in the compression stroke and the radial force in the rebound stroke into the energy and momentum equations,establish the dynamic equation of the car shock absorber,draw the measured indicator diagram,and input it as a sample into the support vector machine for classification.Set the judgment threshold for threshold judgment,and complete the fault detection of the indicator diagram.The experimental results show that the proposed method's fault detection accuracy is good,as the indicator diagram of the automotive shock absorber obtained during insufficient liquid supply,double valve leakage,piston jamming,and sand resistance is basically consistent with the measured indicator diagram.
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