郭锐,石玉,赵静一,王萍,宁超.液压泵可靠性短时试验方法研究[J].农业机械学报,2016,47(3):405-412.
Guo Rui,Shi Yu,Zhao Jingyi,Wang Ping,Ning Chao.Short-time Test Method of Reliability for Hydraulic Pumps[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(3):405-412.
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液压泵可靠性短时试验方法研究   [下载全文]
Short-time Test Method of Reliability for Hydraulic Pumps   [Download Pdf][in English]
投稿时间:2015-09-01  
DOI:10.6041/j.issn.1000-1298.2016.03.057
中文关键词:  液压泵  可靠性  短时试验  容积效率  退化轨迹
基金项目:国家自然科学基金项目(51405424)
作者单位
郭锐 燕山大学 
石玉 燕山大学 
赵静一 燕山大学 
王萍 燕山大学 
宁超 燕山大学 
中文摘要:液压泵属于高可靠长寿命产品,其可靠性对整机的可靠性和工作性能有着至关重要的影响,即使经过长时间的加速寿命试验仍可能出现无失效的情况,给液压泵可靠性评估带来了困难。针对传统的可靠性评估局限性,以容积效率退化数据为基础,应用非线性最小二乘法和最优化理论进行液压泵性能参数退化轨迹研究,提出了液压泵可靠性短时试验方法,将短时试验与可靠性寿命试验特征参数对比,证实了该方法的准确性和有效性。
Guo Rui  Shi Yu  Zhao Jingyi  Wang Ping  Ning Chao
Yanshan University,Yanshan University,Yanshan University,Yanshan University and Yanshan University
Key Words:hydraulic pump  reliability  short-time test  volumetric efficiency  degradation path
Abstract:Hydraulic pumps belong to high reliability and long life product, its reliability has a critical influence on the reliability and performance of whole machine. After a long accelerated life test, it may still be non failure for high reliability and long life products, which makes it difficult to assess reliability. Aiming at the limitation of the traditional reliability assessment techniques, the reliability of the hydraulic pumps short time test method was proposed, which based on performance degradation theory to predict the reliability and residual life of products. To establish residual life prediction model for hydraulic pumps, based on the volumetric efficiency data, the nonlinear least square method was adopted to fit time series, simultaneously, the optimum path search algorithm was built to select the best degradation path. The consistency check of the data in prediction model and the step stress reliability life test were done by using non parametric statistical theory, and the overall sample life distribution function was constructed with Monte Carlo numerical simulation method. The results show that the simulation data of fault sample distribution are consistent with step stress reliability life values. Comparing the test parameters curves of the short term test with step stress accelerated life test, the correctness and feasibility of the short time test method are further verified.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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