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test     
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  试验
    Study on Virtual Test of Vehicle Ride Comfort
    车辆平顺性虚拟试验技术的研究
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    Study on the Virtual Test System of Automobile AMT Electronic Control Unit
    汽车AMT电控单元虚拟试验系统的研究
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    Control Theory and Test on TC and AMT System of Off-road Vehicle
    越野汽车液力变矩器和机械自动变速系统的控制理论与试验
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    Intelligent Control Simulation and Test Research for Semi-active Air Spring Suspension
    半主动空气弹簧悬架智能控制算法的仿真及试验研究
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    A Study on Simulation Test System of Vehicle Ride Comfort Based on VR and Its Key Technology
    基于虚拟现实的汽车平顺性仿真试验系统及其关键技术研究
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  测试
    STUDY ON THE TEST METHOD OF WIND MACHINE IN THE FIELD
    风力机外场测试方法的试验研究
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    The Inspection and Performance Test of the Silicon Fluid Torsional Vibration Damper in Production
    硅油扭振减振器的生产检验和性能测试
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    Discussion on Test Method for Determining Friction and Wear Properties of Clutch and its Facing
    离合器及其面片摩擦磨损性能测试方法探讨
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    Test and Analysis of Dynamic Stresses of a Passenger Car Wheel
    轿车车轮动态应力的测试与分析
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    Discussion on Test and Measurement of Parking Brake in Automotive Monitoring Station
    汽车检测站手制动力测试探讨
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  检测
    THE INSPECTION EQUIPMENT AND A TEST STUDY OF VEHICLE SUSPENTION SHOCK ABSORBER
    车辆悬架减振器检测设备与试验研究
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    A Microcomputer Controlled Measuring System for Automotive Power Steering Test Bed
    汽车动力转向试验台的计算机检测与控制系统
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    ·TEST·MEASUREMENT· A New Non contact Automobile Wheel Alignment Quality Insepection System
    一种新型的非接触式汽车车轮定位质量检测系统
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    Automobile Test Production Line's Intelligent Control System
    汽车安全检测线智能化控制系统
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    Test Research on the Eddy Current Detection of Rectangle Thin-walled Aluminum Welding Tube
    矩形截面薄壁铝焊管涡流检测实验研究
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  试验方法
    Test Method of Motorcycle Braking Performance
    摩托车制动性能试验方法
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    Comprehensive Test Device and Testing Method of Motorcycle Clutch
    摩托车离合器综合试验台架及试验方法
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    Development Trend of Engine Test Methods
    发动机试验方法的发展趋势
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    Comparative Analysis on the Test Method for Mechanical Steering System
    机械式转向器总成试验方法对比分析
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    A Study of Motorcycle Chain Wear Test Method
    摩托车链条磨损试验方法的研究
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    In this article the p-adic Lizorkin spaces of test functions and distributions are introduced.
          
    We review here spherical wavelet analyses of the CMB that test the standard cosmological concordance model.
          
    For the GFA model, thirty molecules were used as training set and eight as test set to evaluate the external predictability of the equations generated using GFA.
          
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    In this article, the wheel tractor is treated as a vibration system with two degrees of freedom. Using the solution of the differential equations of such a system, the characteristics of the free vibrations of tractor is analysed. The two partial frequencies ("constrained frequencies" )are suggested to be the fundamental critenia for wheel tractor riding quality. Some testing result of partial frequency are given, and a method of calculating forced vibrations in two typical cases is introduced, i e., when...

    In this article, the wheel tractor is treated as a vibration system with two degrees of freedom. Using the solution of the differential equations of such a system, the characteristics of the free vibrations of tractor is analysed. The two partial frequencies ("constrained frequencies" )are suggested to be the fundamental critenia for wheel tractor riding quality. Some testing result of partial frequency are given, and a method of calculating forced vibrations in two typical cases is introduced, i e., when tractor runs over a single obstacle and over continuous obstacles. The result of such calculation is compared with those obtained during experiments on turning disk testing stand. With the aid of this method of calculation, the influence of factors such as distribution of masses, tyre inflation pressure, front suspension and seat cushion on the vibration characteristics of both tractor and operator is discussed. Means of improving riding quality are also suggested.

    本文首先把轮式拖拉机简化为两个自由度的振动系统,然后运用该系统振动微分方程的解,分析了机体自由振动的特点,提出把偏频作为评定轮式拖拉机平顺性的一个基本数据,并列举了偏频试验的结果。 文中在分析机体强迫振动时,建立了通过连续和单个不平度两种典型情况的计算方法,并与在转盘试验台上进行相应试验的结果加以比较验证,然后用该计算方法来讨论拖拉机机体质量分布、轮胎气压、前轴悬架、座椅等决定机体和拖拉机手振动的主要结构参数对振动的影响规律,提出改善轮式拖拉机平顺性的途径。

    Load spectrum is a basis in cartying out fatigue-strength test and service life calculation oftypical components in farm machinery.In order to evaluate fatigue feature of typical components,this paper has analysed the road load-time history of the rear-axle and the steering frame of aside tipping agri-t(?)ailer,model 7cc-5 by adopting peak value counting technique,ie,taking thefrequency in appearance of the peak value as the counting load level.This paper has discussed the original load spectrum as well...

    Load spectrum is a basis in cartying out fatigue-strength test and service life calculation oftypical components in farm machinery.In order to evaluate fatigue feature of typical components,this paper has analysed the road load-time history of the rear-axle and the steering frame of aside tipping agri-t(?)ailer,model 7cc-5 by adopting peak value counting technique,ie,taking thefrequency in appearance of the peak value as the counting load level.This paper has discussed the original load spectrum as well as the test load spectrum,togetherwith the difference between them, and put emphasis on elucidating the method itself of the sta-tistical peak load value analysis and the basic principle in data analysis.The road load spectrumfor the rear-axle and the steering frame of a side tipping agri-trailer model 7CC-5 is composedfrom the road load data thus collected,and the load spectrum for program fatigue test is com-piled as well.

    载荷谱是进行农业机械典型零部件的疲劳强度试验研究和寿命估算的基础。为了评价典型零部件的疲劳特性,本文采用峰值计数法来分析7CC-5型五吨侧卸农用挂车后轴及转向架路面的工作载荷时间历程,所计数的载荷量级是峰值出现的次数。本文讨论了初步载荷谱和试验载荷谱所包括的内容及它们之间的区别,重点阐述了载荷峰值的统计分析方法和数据分析的基本原则,并根据采集的路面工作载荷,经过压缩和简化,合成了7CC-5型五吨侧卸农用挂车后轴和转向架的路面工作载荷谱,并编制了用于程序疲劳试验的程序载荷谱。

    In the present paper, the tractor drawing an unbalanced trailer or vehicle is simplified into a spring-mass-damping system of multi-degree of freedom. The power spectrum density and mean square value of acceleration at every output position including the driver's seat are computed by means of solving the frequency response function, so as to show the changes of vibration magnitude through parameter-transformation. In addition to the auto-spectrum density of every input point and cross-spectrum density between...

    In the present paper, the tractor drawing an unbalanced trailer or vehicle is simplified into a spring-mass-damping system of multi-degree of freedom. The power spectrum density and mean square value of acceleration at every output position including the driver's seat are computed by means of solving the frequency response function, so as to show the changes of vibration magnitude through parameter-transformation. In addition to the auto-spectrum density of every input point and cross-spectrum density between the front and rear wheels, the cross-spectrum density between the right and left wheels are also considered in calculation based on the relevent road-spect rumdata. In the study of comfortability of the seat, some rules for the seat vibration magnitude which changes with parameter-transformation have been obtained. These may be used in the future designing as reference. The calculated result are approximately equal as compared with the experimental values.The experiments were carried out on the auto testing runway at Hot-Humidity Experimental Station of Hainan.

    本工作是把牵引单轴拖车的拖拉机或汽车简化为多自由度的弹簧-质量-阻尼的振动系统,通过求解频率响应函数计算包括座椅在内的各输出点的功率谱密度和加速度均方值,从而通过参数改变予示振动量的变化。在计算中除考虑了多点输入的自谱及前后轮之间的互谱外,还根据有关路面资料考虑了左右轮之间的互谱。结合乘坐舒适性研究,绘出了座椅振动量随各参数变化的一些规律,可为今后设计工作参考。计算值经与实际测量值验证基本相符。

     
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