Aiming at the failure of a certain angle potentiometer,fault tree investigation is carried out,and the fault is located as a micro-crack at the connection between the blue 3#lead wire rivet and the silver paste of the potentiometer,which leads to poor signal contact of the blue 3#lead,and finally causes abnormal output signal of the potentiometer.In response to the problem,this article proposes improvement measures,optimizes the inspection process of the potentiometer,increases the stress screening test of the potentiometer and the actuator,and verifies the feasibility of the improvement measures.
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