通风机性能计算机辅助测试系统

介绍了测试风机生能的计算机辅助测试系统，本系统实现了风机性能参数的自动测试和计算，并可以对风机运行过程进行实时报警和远程通信。建立了风机性能测试数据库系统，以有效管理所有的试验数据。     

排气风室加短风管对风机性能测试的影响

根据GB／T1236—2000及AMCA210—99标准，对风机出口联接短风管和直接联接风室两种情况分别在排气风室中对风机性能进行测试，压力产生明显差异。就此现象用试验的方法展开研究，分析这种差异产生的原因，得出了明确的结论。     

进气风室与进气风管对风机性能测试的差异

对进气风管和进气风室两种试验装置下，测试风机性能的差异进行了系统的试验；对引起差异的原因作了理论分析；得出几点有益结论。     

风机盘管机组热工性能测试方法研究

对一种风机盘管机组热工性能测试方法进行了研究，分析了测试系统中空气的热湿处理过程，拟合出了图表数据的关系式，编制了空气参数计算程序，为风机盘管机组热工测试及性能评价提供计算工具。     

电厂风机的振动与监测

本文通过对风机振动的测试分析，提出了适合于风机的振动监测方法，并介绍了所研制的风机监测装置的原理、性能与特点。     

通风机性能在线监测系统在风机测试中的应用

在进行通风机性能测试时应用了在线监测系统，结果表明该系统不仅可以监测风机性能，也可监测风机的振动，对保证设备安全长期使用具有重要的意义。     

工业通风机性能测试中喷嘴的选择

采用进气风室试验装置对离心风机进行性能测试，研究单喷嘴和组合喷嘴测试同一风机所导致的测量结果偏差大小及其分布规律。试验结果表明：选择不同的喷嘴会导致同一流量下风机的静压和风机的效率产生偏差，喷嘴的流通面积小，则静压测试结果偏大，风机效率偏高。     

风机性能的自动测试系统

介绍一种用单片机和ＰＣ机组成的风机性能测试系统，可实现风机性能试验及数据处理的自动化。本文简要介绍了测试系统的硬件软件设计。     

大型离心通风机的状态监测

对风机振动频率、振动波动做了分析，分别介绍了风机振动测试与状态判别方法，指出了监测装置的原理与性能特点。     

对旋式主通风机现场性能测试与经济运行

根据BD系列对旋式主通风机的结构特点和风流流动特征，提出了静压差法测试风机风量的方法；针对该类型风机的地面布置，提出了风机现场性能的测试方法；根据测试结果，并结合矿井实际情况，提出了实现该类型主通风机经济运行的方法和途径。     

BAYESIAN DEMONSTRATION TEST METHOD WITH MIXED BETA DISTRIBUTION

A complex mechatronics system Bayesian plan of demonstration test is studied based on the mixed beta distribution. During product design and improvement various information is appropriately considered by introducing inheritance factor, moreover, the inheritance factor is thought as a random variable, and the Bayesian decision of the qualification test plan is obtained, and the correctness of a Bayesian model presented is verified. The results show that the quantity of the test is too conservative according to classical methods under small binomial samples. Although traditional Bayesian analysis can consider test information of related or similar products, it ignores differences between such products. The method has solved the above problem, furthermore, considering the requirement in many practical projects, the differences among this method, the classical method and Bayesian with beta distribution are compared according to the plan of reliability acceptance test.     

军用和民用发动机短舱冷却试验方法的对比分析

基于国军标和适航标准对发动机冷却系统的验证要求,分析发动机短舱冷却系统在军机设计定型和民机适航取证试飞方面的不同,有助于我国军用航空发动机设计定型和大型民用发动机取证试飞水平的提升。     

The Ball-on-Cylinder Test for Evaluating Jet Fuel Lubricity

For evaluating the lubricating qualities of jet fuels, the ball-on-cylinder device appears to be particularly suitable. It can operate at low enough loads so that subtle differences in fuel quality can be detected. Examples are given of the effect of refining, the differences in additive action, the importance of test atmosphere, and the influence of temperature. Other test methods appear to be too severe for all-around fuels testing.     

基于AMESim的船用液压阻尼器结构优化与仿真

利用孔口流动原理建立船用液压阻尼器的数学模型,根据模型的优化目标函数对控制阀结构进行优化设计,提高了阻尼器控制阀的闭锁响应效果;采用AMESim软件建立阻尼器及试验台的仿真模型,将优化设计与常规设计的仿真结果作对比,验证了优化设计的正确性;对优化设计结果进行实物样机试验,通过试验结果与仿真结果的对比,进一步证明了优化设计的有效性,同时分析了二者的差异及造成这些差异的原因。将结构优化设计方法、模型仿真、实物样机试验相结合,设计出满足船用要求的液压阻尼器。     

汽车转向管柱试验工程技术（二）——检测试验系统

检测试验就是对汽车转向管柱的功能,生产工艺的验证,零件形体,成分的检测以及转向管柱总成和下传动轴性能的测试。试验由于目的,要求,对象的不同,导致检测试验系统的复杂与难易程度存在很大的不同。本文着重讨论汽车转向管柱性能和参数的检测试验系统。     

汽车用压缩机耐久性试验装置的研制

汽车用压缩机的运行工况与通用型压缩机的运行工况有很大的差别,要对其耐久性进行考核,就必须模拟其实际的运行工况.阐述了汽车用压缩机耐久性试验装置的设计要点、调试中解决的问题以及研制过程的总结.     

画法几何及机械制图试题库系统的开发

分析《画法几何与机械制图》试卷的特点,提出了这门课程试题库与普及性试题库的差异性及特殊性,在此基础上开发了适用于这门课程的专用试卷生成系统。     

旋涡风机前向和后向叶轮特性对比研究

利用CFD软件分别对前向和后向叶轮旋涡风机的单个叶道进行流场分析,得到前向和后向叶轮单个叶道的压力性能差异.然后进行试验研究,得到前向和后向叶轮整体的压力性能差异.     

Assessment of the biodegradability of mineral oil and synthetic ester base stocks,using CO2 ultimate biodegradability tests and CEC-L-33-T-82

The EPA (Gledhill) Shake Flask test, OECD Modified Sturm test, and CEC (CEC-L-33-T-82) Biodegradability test have been used to assess the degradability of mineral oil, natural ester, and synthetic ester base stocks. The Shake and Sturm tests are ultimate biodegradability tests which determine the percentage of test material carbon converted to CO₂ over a 28-day period; the CEC test determines, at 21 days, the disappearance of the carbon-hydrogen stretch in Freon extracts of the test medium. In all three tests, the test material is added to a mineral salts medium, the medium is inoculated with mixed liquor from a municipal waste water treatment plant and test flasks are shaken. The Shake Flask and CEC tests were able to show expected differences in degradability between paraffinic and naphthenic mineral oils. A poor correlation was found between ultimate biodegradability test results and results from the CEC test when synthetic esters were studied. Dissolved organic carbon (DOC) analysis of the test medium indicated that degradation of some synthetic esters led to the accumulation of water-soluble metabolites which are not extractable into Freon, as required for quantification by the CEC test. Thus, while the CO₂ tests detected differences in the degradability of these test materials, the CEC test did not. The CEC test can, therefore, overestimate degradability of some synthetic esters, leading to the erroneous conclusion that these materials would meet OECD Ready Biodegradability criteria. Biodegradability results for the EPA, OECD, and CEC tests are presented and results compared.     

应用新法规的某款卡车车外通过噪声测试方法

随着汽车行业及汽车使用环境的发展,根据我国汽车产品的实际情况,重新制订了汽车车外噪声限值及测试方法。应用车外通过噪声新的测试方法,针对某款N1类微型卡车进行车外噪声新方法的测试,确认哪些因素、参数、工况等能影响测试结果;并对比车外噪声老测试方法的测试结果,分析两者的差异性,并指导后续车型的开发设计。