The Life Reliability Prediction of Electro-Mechanical Systems

• Main Authors: Siao-Ciang Liao, 廖曉強
• Other Authors: Tai-Yan Kam
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/51260581581087913070

碩士 === 國立交通大學 === 機械工程系 === 90 === The Life Reliability Prediction of Electro-Mechanical Systems Student : Xiao-Qiang Liao Advisor : Dr. Tai-Yan Kam Institute of Mechanical Engineering National Chiao Tung University ABSTRACT Due to societal and technological progress, safety becomes more important and necessary for modern people. As we know that reliability of protection system is very important. So, this paper will use reliability theory such as interference theory model and failure rate analysis to predict reliability of safety light curtain system. Since the components of a light curtain are general fabricated in a series, we can then use reliability concept to build reliability block diagram and to simulate the system as a series system. In prediction, electronic elements’ base failure rate and other related corrective coefficients can be found in MIL-HDBK-217F. On the other hand, photo-diode and photo-transistor of the light curtain unit are studied using the interference theory to predict the unit’s reliability. Finally, use Fortran 90 language to write a prediction program for the prediction of the reliability of the electrical part of the safety light curtain system. As for the mechanical fatigue of mechanical components are studied using experimental results. Am empirical equation is derived to predict fatigue reliabilities of mechanical components at different stress levels.