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首页> 外文会议>European-African Regional Conference of the Internatinal Society for Terrain Vehicle Systems >EVALUATION OF TYRE SOIL MAPPINGS FROM FIELD MEASUREMENTS WITH A TRACTOR EQUIPPED WITH WHEEL FORCE TRANSDUCERS
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EVALUATION OF TYRE SOIL MAPPINGS FROM FIELD MEASUREMENTS WITH A TRACTOR EQUIPPED WITH WHEEL FORCE TRANSDUCERS

机译：用拖拉机配备轮力传感器的现场测量的轮胎土映射评估

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Increased traction performance, optimised fuel consumption and soil protection are some of the main drivers in tractor development today. By using (lockable) differentials and all-wheel drive, the entire vehicle mass is efficiently used to generate tractive force in mid- and high-spec tractors. Investigations show that not only the soil compaction risk, but also the tractive efficiency can be further optimised by adjusting the tyre inflation pressure. In order to exploit this potential for optimisation, it is necessary to determine traction parameters such as tractive efficiency, the traction coefficient and the slip to generate tyre soil mappings during tractor operation. The maximum of the curve of the tractive efficiency plotted over the traction coefficient or slip can be determined as an optimisation target and the curves for different tyre pressure settings can be compared with each other. This paper aims to derive tyre soil mappings from measurements made with a tractor equipped with wheel force transducers. Usually, tyre soil mappings displays the characteristic curves of the traction parameters above the slip. Alternatively, the traction parameters can be displayed as a function above the traction coefficient. These tyre soil mappings are determined using classification methods both as a function of the slip and the traction coefficient. Whilst using a tractor in the field, the tyres operate at an almost constant operating point. When recording traction parameters in real time, only small sections of a tire soil map can be measured. The difficulties for curve predictions of the tractive efficiency as a function of slip with the help of known approximation functions are shown. Using the Mobility Number according to Brixius, characteristic curves for the tractive efficiency can be described above the traction coefficient. Based on these idealized curves, a new approximation function is developed and then used to predict a curve from the tire soil mappings that exceeds the measured range.
机译：提高牵引性能，优化的燃油消耗和土壤保护是拖拉机发展的一些主要驱动因素。通过使用（可锁定）差分和全轮驱动，整个车辆质量有效地用于在中和高规格拖拉机中产生牵引力。研究表明，不仅通过调节轮胎充气压力，可以进一步优化土壤压实风险，也可以进一步优化牵引效率。为了利用这种优化的可能性，需要确定牵引系数，牵引系数和滑动的牵引参数，以在拖拉机操作期间产生轮胎土壤映射。绘制在牵引系数或滑移上的牵引效率的最大曲线可以被确定为优化目标，并且可以彼此比较不同轮胎压力设置的曲线。本文旨在通过用轮子换能器的拖拉机进行的测量来源于轮胎土地映射。通常，轮胎土壤映射显示滑动以上牵引参数的特性曲线。或者，牵引参数可以作为牵引系数上方的函数显示。这些轮胎映射是使用分类方法确定作为滑动和牵引系数的函数。虽然使用该领域的拖拉机，但轮胎在几乎不变的操作点运行。当实时记录牵引参数时，只能测量轮胎地图的小部分。示出了与已知近似函数的函数作为滑移函数的牵引效率的曲线预测的困难。使用根据Brixius的移动号码，可以在牵引系数上方描述牵引效率的特征曲线。基于这些理想化的曲线，开发了一种新的近似函数，然后用于预测超过超过测量范围的轮胎土地映射的曲线。

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