Importance measure method for joint clearance of mechanism

Zhongchao Sun, Tianxiang Yu, Weimin Cui, Bifeng Song

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

Abstract

A method to measure the contribution of random joint clearances to mechanism output error, termed as Error Importance (EI), is presented in this paper. In this method, the 2-order original moment is used to characterize the deviation of mechanism output error and joint clearances from their ideal values, i.e. zero. Then the 2-order original moment of mechanism output error is decomposed into a series of fractions. These fractions are divided into two categories: individual effects and interaction effects. The total effect of one joint clearance is defined as the sum of the corresponding main effects and the interaction effects, and total importance index, i.e. EI index, is defined as the value of its total effect relative to 2-order original moment of mechanism output error. Similarly, the total importance index of a group of joint clearances are defined also. Then the mathematical and physical properties of the EI indices are discussed, and a Monte Carlo based evaluation method is offered. At last, the EI indices are applied to cabin door mechanism of aircraft landing gear. Simulation results revealed that the EI indices can reflect honestly the contribution of joint clearances to mechanism output error.

Original languageEnglish
Title of host publicationSafety and Reliability - Safe Societies in a Changing World - Proceedings of the 28th International European Safety and Reliability Conference, ESREL 2018
EditorsCoen van Gulijk, Stein Haugen, Anne Barros, Jan Erik Vinnem, Trond Kongsvik
PublisherCRC Press/Balkema
Pages793-800
Number of pages8
ISBN (Print)9780815386827
StatePublished - 2018
Event28th International European Safety and Reliability Conference, ESREL 2018 - Trondheim, Norway
Duration: 17 Jun 201821 Jun 2018

Publication series

NameSafety and Reliability - Safe Societies in a Changing World - Proceedings of the 28th International European Safety and Reliability Conference, ESREL 2018

Conference

Conference28th International European Safety and Reliability Conference, ESREL 2018
Country/TerritoryNorway
CityTrondheim
Period17/06/1821/06/18

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