Title

Time-Dependent Reliability Analysis for Function Generator Mechanisms

Abstract

A function generator mechanism links its motion output and motion input with a desired functional relationship. The probability of realizing such functional relationship is the kinematic reliability. The time-dependent kinematic reliability is desired because it provides the reliability over the time interval where the functional relationship is defined. But the methodologies of time-dependent reliability are currently lacking for function generator mechanisms. We propose a mean value first-passage method for time-dependent reliability analysis. with the assumption of normality for random dimension variables with small variances, the motion error becomes a nonstationary Gaussian process. We at first derive analytical equations for upcrossing and downcrossing rates and then develop a numerical procedure that integrates the two rates to obtain the kinematic reliability. A four-bar function generator is used as an example. The proposed method is accurate and efficient for normally distributed dimension variables with small variances.

Department(s)

Mechanical and Aerospace Engineering

Sponsor(s)

Key Laboratory of Manufacturing and Automation of Sichuan Province
Missouri University of Science and Technology. Intelligent Systems Center
Xihua University

Keywords and Phrases

Function Generators; Normal Distribution; Reliability Analysis

Library of Congress Subject Headings

Kinematics
Quality assurance
Random variables

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 American Society of Mechanical Engineers (ASME), All rights reserved.

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