Point Estimation Method of Electromagnetic Flowmeters Life Based on Randomly Censored Failure Data

School of Measurement Technology and Communication Engineering, Harbin University of Science and Technology, Harbin, China
Tel.: +86 13009861061, fax: +86-0451-86392366

E-mail: zhzh49@126.com

Received: 18 June 2014 /Accepted: 31 July 2014 /Published: 31 August 2014

Abstract: This paper analyzes the characteristics of the enterprise after-sale service records for field failure data, and summarizes the types of field data. Maximum likelihood estimation method and the least squares method are presented for the complexity and difficulty of field failure data processing, and Monte Carlo simulation method is proposed. Monte Carlo simulation, the relatively simple calculation method, is an effective method, whose result is closed to that of the other two methods. Through the after-sale service records analysis of a specific electromagnetic flowmeter enterprises, this paper illustrates the effectiveness of field failure data processing methods.

Keywords: Failure data, Reliability, Monte Carlo simulation, Estimation method, Product life.

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