根据OECD规范2评估农业拖拉机操作和驾驶性能的试验方法

S. Lebedev, A. Korobko
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引用次数: 0

摘要

本研究的目的是对农用拖拉机进行新规定的测试,评估其性能,从而实施OECD规范2的研究方法。牵引车及其主要部件的测试采用部分加速度法,其基础是求解动力学逆任务:由加速度估计牵引车的作用力。测量方法和手段(在乌克兰ndipvt哈尔科夫分公司开发)有效地用于测试拖拉机及其主要部件。研究的结果。所提出的快速方法可以减少测试时间,并及时识别被测试系统运行中的缺点。提出的气缸-活塞组快速测试方法提供了及时发现发动机运行缺陷的能力。已经确定,测试单元的最有效运行是在牵引车未满载时。运输工艺单元的运动稳定性与其可控性是相互联系的,可控性是由转向的技术条件决定的。所研究的拖拉机方向盘角加速度值与聚合机之间的关系具有95%的可靠性。为了确定制动性能,提出了一个表征拖拉机制动时减速度增长率的指标。在元件技术条件不稳定的情况下,评价拖拉机悬挂系统液压驱动的工作质量,首先要对液压缸内的流体流量进行评价,最后要对旁通阀内的流量进行分析。结论。经合组织代码2规范了农业拖拉机操作测试方法,在此基础上,乌克兰ndipvt哈尔科夫分公司制定了评估拖拉机牵引力和能源性能的工业标准。理论和实验证明,在牵引车及其主要部件的性能测试中,部分加速度法是有效的,该方法是基于由牵引车受力空间的矢量和向加速度空间的矢量和的反向转换。这种方法使您可以快速评估拖拉机与安装和牵引的农业机械相结合时的性能,以及拖拉机设计的主要要素的技术条件。关键词:拖拉机,试验,OECD规范2,主要元素,故障,表达方法
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TEST METHODOLOGY FOR ASSESSING THE OPERATING AND EXCONIC QUALITIES OF AGRICULTURAL TRACTORS PURSUANT TO OECD CODE 2
Purpose of the study is new provisions for testing agricultural tractors, evaluating their performance, which implement the OECD Code 2 Research methods. The testing of the tractor and its main elements is based on the method of partial accelerations, the basis of which is the solution of the inverse task of the dynamics: the acting forces are estimated from the acceleration. The method and means of measurement (developed in the L. Pogorilyy UkrNDIPVT Kharkiv branch) are effectively used in testing tractors and its main elements. The results of the study. The proposed express methods make it possible to reduce the time for testing and timely identify shortcomings in the operation of the systems being tested. The proposed express test method for the cylinder-piston group provides the ability to timely identify shortcomings in the operation of engines. It has been established that the most efficient operation of the tested unit is when the tractor is not fully loaded. The stability of the movement of the transport-technological unit is interconnected with its controllability, which is determined by the technical condition of the steering. The relationship between the investigated values of the angular accelerations of the steering wheel of the tractor and the aggregated machine is provided with a reliability of 95 %. To determine the braking properties, an indicator is proposed that characterizes the growth rate of the tractor deceleration during braking. To evaluate the quality of functioning of the hydraulic drive of the tractor mounted system in the case of unstable technical condition of its elements, it is necessary to start with the evaluation of the fluid flow in the hydraulic cylinder and end with the analysis of the flow in the bypass valve. Conclusions. Code 2 of the OECD normalizes the methodology for operational testing of agricultural tractors, on the basis of which in L. Pogorilyy UkrNDIPVT Kharkiv branch developed industry standards for assessing the traction and energy performance of tractors. It has been theoretically and experimentally proved that in the performance tests of tractors and its main elements, the method of partial accelerations is effective, which is based on the reverse transition from the vector sum in the space of forces that act on the tractor to the vector sum in the space of accelerations. This method allows you quickly assess the performance of tractors when coupled with mounted and trailed agricultural machines, as well as the technical condition of the main elements of the tractor design. Keywords: tractor, tests, OECD Code 2, main elements, malfunctions, express methods
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