Time Based Preventative Maintenance Policies for Circuit Breakers with Multiple Failure Types

Will Wascom, Yisha Xiang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The reliability of critical components within large test facilities, such as the Unitary Plan Wind Tunnel (UPWT), is a paramount concern, due to the significant impact of component failures which result in facility downtime and subsequent schedule increases. Testing is on the critical path of multiple aircraft and spacecraft development projects, therefore, a component failure affects not only the test facility but also many development programs which require testing prior to attaining key milestones in order to stay on schedule. Vacuum circuit breakers, which actuate electrical power during wind tunnel operations, are critical single point of failure components. The breakers have several failure mechanisms and associated repair processes. This paper models the recurrent failure and subsequent maintenance events throughout the operation life of vacuum circuit breakers as a trend renewal process. The model parameters are estimated using the maximum likelihood method. Subsequently, a generalized maintenance policy is constructed which maximizes the availability of the UPWT system. The policy establishes optimal preventative maintenance scheduling for individual circuit breakers given their unique failure history.

Original languageEnglish
Title of host publication67th Annual Reliability and Maintainability Symposium, RAMS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728180175
DOIs
StatePublished - 2021
Event67th Annual Reliability and Maintainability Symposium, RAMS 2021 - Orlando, United States
Duration: May 24 2021May 27 2021

Publication series

NameProceedings - Annual Reliability and Maintainability Symposium
Volume2021-May
ISSN (Print)0149-144X

Conference

Conference67th Annual Reliability and Maintainability Symposium, RAMS 2021
Country/TerritoryUnited States
CityOrlando
Period05/24/2105/27/21

Keywords

  • Availability
  • Preventative Maintenance
  • Trend Renewal Process

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