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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Study of the correlation between the performances of lunar vehicle wheels predicted by the Nepean wheeled vehicle performance model and test data
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Study of the correlation between the performances of lunar vehicle wheels predicted by the Nepean wheeled vehicle performance model and test data

机译：Nepean轮式车辆性能模型预测的月轮车轮性能与测试数据之间的相关性研究

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摘要

This paper describes the results of a study of the correlation between the performances of wheels for lunar vehicles predicted using the Nepean wheeled vehicle performance model (NWVPM), developed under the auspices of Vehicle Systems Development Corporation, Ottawa, Canada, and the corresponding test data presented in 'Performance evaluation of wheels for lunar vehicles', Technical Report M-70-2, prepared for George C. Marshall Space Flight Center, National Aeronautics and Space Administration (NASA), USA, by the US Army Engineer Waterways Experiment Station (WES). The NWVPM was originally developed for design and performance evaluation of terrestrial off-road wheeled vehicles. The purpose of this study is to assess the potential of the NWVPM for evaluating wheel candidates for the new generation of extra-terrestrial vehicles. Two versions of a wire-mesh wheel and a hoop-spring wheel, which were considered as candidates for lunar roving vehicles for the NASA Apollo program in the late 1960s, together with a pneumatic wheel were examined in this study. The tractive performances of these wheels and of a 4 × 4 test vehicle with the pneumatic wheels on air-dry sand were predicted using the NWVPM and compared with the corresponding test data obtained under Earth's gravity and previously documented in the above-named report. While test data on wheel or vehicle performances obtained under Earth's gravity may not necessarily be representative of those on extra-terrestrial bodies, because of the differences in gravity and in environmental conditions, such as atmospheric pressure, it is still a valid approach to use test data obtained under Earth's gravity to evaluate the predictive capability of the NWVPM and its potential applications to predicting wheel or wheeled rover performances on extra-terrestrial bodies. Results of this study show that, using the ratio (P^sub 20^/W) of the drawbar pull to normal load at 20 per cent slip as a performance indicator, there is a reasonable correlation between the predictions and experimental data. This indicates that the NWVPM has the potential as an engineering tool for evaluating wheel candidates for a future generation of extra-terrestrial vehicles, provided that appropriate input data are available. [PUBLICATION ABSTRACT]
机译：本文介绍了在加拿大渥太华车辆系统开发公司（Vehicle Systems Development Corporation）主持下开发的，使用Nepean轮式车辆性能模型（NWVPM）预测的月球车辆轮毂性能之间的相关性研究结果。由美国陆军工程师水路实验站为美国国家航空航天局（NASA）的乔治·C·马歇尔太空飞行中心准备的《技术报告M-70-2》中的“月球车车轮性能评估”中介绍（ WES）。 NWVPM最初是为陆地越野轮式车辆的设计和性能评估而开发的。这项研究的目的是评估NWVPM在评估新一代地面车辆的车轮候选者方面的潜力。在这项研究中，研究了两种版本的金属丝网轮和箍簧轮，它们被认为是1960年代后期NASA阿波罗计划的月球巡回车的候选者，同时还考虑了气动轮。使用NWVPM预测了这些车轮以及在风干沙上装有气动车轮的4×4测试车辆的牵引性能，并将其与在地球重力作用下获得的相应测试数据进行了比较，该数据先前已记录在上述报告中。尽管由于重力和环境条件（例如大气压力）的差异，在地球重力下获得的有关车轮或车辆性能的测试数据不一定代表地面上的数据，但仍然是一种有效的测试方法在地球重力作用下获得的数据，用于评估NWVPM的预测能力及其在预测地外物体的轮式或轮式流动站性能方面的潜在应用。这项研究的结果表明，使用牵引杆拉力与滑移率为20％时的法向载荷的比值（P ^ sub 20 ^ / W）作为性能指标，预测与实验数据之间存在合理的相关性。这表明，只要有适当的输入数据，NWVPM就有可能作为工程工具来评估下一代地面车辆的车轮候选。 [出版物摘要]

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