The Research Of Steering Angle Sensor Early Failure Root Cause Analysis And Production Process Improvement

In today’s automobile electrical products market,the most important factor to gain the market is the good products’ quality performance and good customer satisfaction.The steering angle sensor is one of the important and typical electrical parts of vehicle.To research its early failure root causes and the related corrective actions can increase the market share and reduce the company’s quality cost effectively,then increase the company’s economic benefits.Though the collection and analysis of the existing steering angle sensor’s failure record,using three different criteria of environment test to find out and validate the relationship between the environment factor of early failure trigger condition and the part’s failure rate.With the application of the bathtub curve theory and Weibull distribution function by Minitab which is the professional statistical analysis software and compare the calculation result with the environment test data,the inflection point of the early failure period and random failure period can be confirmed.Then,Fault Tree Analysis tool and Fish Bone Analysis Chart can help to find out each occurrence root cause of these early failure modes.After review and analysis these occurrence root causes,the corrective and improvement actions can be conducted.Do the validation test for these improved products to assess the effective of these improvement actions.If the improvement actions work well,need to establish or modify the Failure Mode and Effective Analysis,Process Flow Chart to ensure these corrective and improvement actions can be implemented as long tern solution.Though researching the steering angle sensor early failure and process improvement,one standard method can be established to solve and prevent the early failure problem for similar electrical products.