車用電子調節器失效模式與效應分析

Abstract

失效模式與效應分析(Failure Mode and Effects Analysis ,FMEA)是可靠度管理技術的一種，強調在系統發生失效之前分析可能失效模式及失效原因，並結合工程人員的技術與經驗，發現產品設計或製程上可能的潛在的失效問題，進ㄧ步實施排除及矯正改善。本文研究目的在於運用失效模式與效應分析(FMEA)方式，判定調節器電子元件失效的嚴重層級，並找出系統中各類電子元件中對失效具較大影響的元件，再結合關鍵性分析與關鍵性矩陣法，將元件依嚴重程度排列，同時改善損壞率較高元件的設計瑕疵，以降低電路板損壞率，提高系統可靠度。另外本文也利用可靠度鑑定試驗的方法來驗證實驗的合理性及產品能維持既定可靠度的目標，進而建立一套專門針對可靠度預估與抽樣試驗的流程，以提供後續研究人員參考之用。

Failure Mode and Effect Analysis (FMEA) is a technique for reliability management. This technique is applied to a vehicle electronic regulater by evaluating its failure modes and causes of failure to predict the potential failure in the system. The combination of this technology and experience of people in identifying the foreseeable failure modes of the system can help plan for failure prevention. The purpose of this paper is to determine the degrees of severity of the failures of the critical components of the vehicle electronic regulator in the failure mode and effects analysis (FMEA). The criticality values of each component’s failure modes have been calculated via Criticality Analysis and Criticality Matrix diagram. The failure effects of the electronic components are sorted into different levels according to their severity of failure. The information obtained can thus identify the critical components of the vehicle electronic regulator so that practical strategies can be proposed to improve the performance of the system. As a result, the reliability of the vehicle electronic regulator can be enhanced and the availability of alternators can be improved. Furthermore this research also used the reliability prediction method and production reliability acceptance testing flow chart to assess the reliability of the vehicle electronic regulator. The results show that the regulator can achieve the require reliability.