Papers by Keyword: Reliability Test

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Authors: Jiang Shao, Chen Hui Zeng
Abstract: Physics-of-Failure (PoF) represents one approach to reliability assessment based on modeling and simulation that relies on understanding the physical processes contributing to the appearance of the critical failures. Firstly the connotation and meaning of PoF method were analyzed here, the inherence relation between PoF and reliability was expatiated, the PoF based reliability method and current reliability method based on probability statistics were compared, their differences and relationships were discussed here. Then the application condition of PoF method in reliability engineering in European and American developed country and China were summarized, the PoF based reliability engineering technologies were introduced systemically from several aspects, such as reliability design and analysis, reliability test and validation, maintain and support. Finally, combining with the developing characteristics of military materiel during the new period, some future investigation directions and application foregrounds were prospected.
Authors: Torsten Linz, René Vieroth, Christian Dils, Mathias Koch, Tanja Braun, Karl Friedrich Becker, Christine Kallmayer, Soon Min Hong
Abstract: This document explains different approaches to integrating electronics in textiles. It discusses reliability standards and tests for electronics in textiles. Encapsulation technologies are evaluated concerning their applicability in textile integrated electronics. Furthermore a specific assembly with embroidered wiring and embroidered interconnections has been developed and improved. Two different encapsulation technologies have been developed for this assembly. Standardized tests have been carried out to assess the reliability of the assembly and its encapsulations. Finally the achievements are critically discussed.
Authors: Ying Wu, Jun Li, Wen Hao Lu, Shi Yuan Xiong
Abstract: The study on power steering gear is less than other auto parts at home or abroad. Compared with developed countries, the independent design and manufacture of power steering starts late, and lacks practical and effective evaluation standards. The combination of the theoretical analysis, numerical calculation and experimental verification is the key technology to optimize the design or test to evaluate the power steering gear’s function and performance. In this paper, the power steering gear’s finite element analysis(FEA) model was built to analyse the fatigue stress and fatigue life of the power steering gear’s components, such as housing, input shaft and output shaft. and the fatigue test of the power steering gear was also designed and implemented. Research showed that, the power steering gear fatigue properties of FEA and reliability test have the same results. The total damage of 4 A-B-C event cycles is less than 1, the steering gear system is judged safe after 4 event cycles per design requirements. Each component of the power steering gear has different maximum average stress. The stress of the sector shaft, the piston and the screws is very close to the yield stress, which is much larger than the other components, and needed to be treated with caution The maximum stresses of the gear housing are a little over the yield strengths at the stress of 6,118 lbs, which is more dangerous than the other components, and great attention should be paid to it.
Authors: Xiang Po Zhang, Jian Zhong Shang, Zhuo Wang
Abstract: Improving reliability of the machining center (MC) has great significance for raising the manufacturing level of machine building industry and enhancing the international competitiveness of products. Based on the current situation of researches on the reliability of machining center, this paper presents a systematic discussion of MC from the perspectives of the reliability design, the test and assessment and reliability management respectively, aiming to improving reliability of the MC. Relevant methods and approaches, which form a theoretical system of reliability researches on the MC and serve as a scientific and systematic reference basis for them, are proposed. The study of it has an active meaning to raising the level of researches on the reliability of MC.
Authors: Xue Mei Du, Wei Lei, Nai Jia Wang, Jing Yu Ding
Abstract: Traditional reliability test of electronic products has the feature of many contents, long cycle and rising test fees. This paper analyzes the feasibility of combination of Taguchi method and reliability test. Then, the process of optimizing reliability test is proposed with emphasis on use of Taguchi method such as orthogonal table and signal-to-noise ratio (SNR). Finally, the process is applied to the reliability test on the shell of a new type of portable electronic product developed by C Company, verifying that the new process is operable and can reduce test numbers, time and cost while guaranteeing effectiveness of reliability test compared with the traditional approach.
Authors: Jing Jiang
Abstract: For a long time, reliability plays an extremely important role in electrical automation control equipment. To improve electrical automation control equipment’s reliability, the job should be promoted to a strategic height so as to assume and effectively control the factors affecting the reliability of the equipment, thus ensure the accuracy of reliability test. This paper, based on this, first is to implement the reliability influence factors analysis, and then introduces the main testing methods. By contrast, it finally comes to the conclusion that this article can provide certain reference for the research of related topics.
Authors: Xiang Po Zhang, Nai Hui Yu, Jian Zhong Shang, Zhuo Wang
Abstract: Reliability test is the most effective way to achieve the data needed in machining center’s reliability design and assessment, and also a compulsory technological way to improve the reliability of the machining center. For the purposes of evaluating and improving the reliability level of machining center effectively, a laboratory reliability test for five-axis machining center was designed. This test method designed in this paper has the characteristics of high pertinence and easily realized in engineering, and it can be generalized as a reliability test criterion for five-axis machining center.
Authors: San Xia Wang, Lu Zhang, Chong Bo Zhang, Wen Liang Li, Wei Zhou
Abstract: In order to study the fatigue reliability of taxis, a test method that correlated typical user road with proving ground reliability road is proposed. According to the result of investigation, after taking the road test on the user road, the load spectrum of taxis on the condition of typical user road is obtained. Then the rain flow counting method is used to obtain the load distribution matrixes through analyzing the two groups of data that are tested above , and with pseudo damage as a quantitative basis for the calculation of taxis fatigue damage that generated from load spectrum, an equivalent relationship is established between the two. The calculation results indicate that the ratio of damage of the typical user road to proving ground reliability road is 1 to 148.8, if regarding 600,000 km as total scrapped mileage of a taxi, 4,000 km reliability test on proving ground can achieve the same damage.
Authors: Jing Ying Zhao, Fang Yao, Ming Ji, Xiao Long Ma, Fang Wu
Abstract: The reliability test of the overload relay is an important way to find out weak parts and improve the reliability of products. So reliability test technology is of great significance. The reliability test method of overload relay is studied on. By use of reliability tester, the reliability test for the typical productsJRS1D-25 is carried out. According to the test result, the reliability analysis is developed from two aspects of product structure and material characteristics. The failure reasons of the overload relay are found out and the improvement measures are put forward.
Authors: Xiang Po Zhang, Nai Hui Yu, Jian Zhong Shang, Zhuo Wang
Abstract: As the main subject of the reliability research, the reliability test is an important technological way to improve the reliability of the machining center (MC). Based on the failure characteristics and reliability research status of machining center, some related issues to the MC’s reliability test were studied in this paper. Three reliability test methods of MC, field test, laboratory test and virtual test were introduced, and the advantages and disadvantages were analyzed. It has some engineering significance as it provided a guideline to select a correct and effective method to the reliability test of MC.
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