机械设备运行可靠性评估的发展与思考_何正嘉.pdf

机械设备运行可靠性评估的发展与思考_何正嘉.pdf

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机械设备运行可靠性评估的发展与思考_何正嘉

50 2 Vol.50 No.2 2014 1 JOURNAL OF MECHANICAL ENGINEERING Jan. 2014 DOI 10.3901/JME.2014.02.171 * ( 710049) ISO3945 TH17 Developments and Thoughts on Operational Reliability Assessment of Mechanical Equipment HE Zhengjia CAO Hongrui ZI Yanyang LI Bing (State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049) Abstract Operational reliability assessment of the specified mechanical equipment is an individual problem. The average reliability, obtained by using probability statistics method with large sample data, cannot fulfil requirements of operating reliability evaluation for individual equipment.The emerged problems are summarized when the traditional reliability theory is applied to operational reliability assessment of mechanical equipment, and corresponding improved methods are reviewed. The theoretical basis and technical connotation of operational reliability assessment for individual equipment, which is based on dynamic modelling, fault mechanism analysis, signal processing and fault feature extraction, are expounded. Then, a new concept of operational reliability is given and the degree of operational reliability is defined. An operational reliability assessment approach based on running condition information of mechanical equipment is proposed. Mapping models between runni

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