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牵引试验是对拖拉机、机耕船等农用动力机具综合评价其动力性和经济性的重要手段。目前国内外牵引试验方法是用负荷车给被试验拖拉机或机耕船施加牵引载荷,然后用电测记录被测车的各项参数。这种加载方法是靠人来控制负荷车,在负荷车与被测车之间保持一相对稳定的速度差,达到给被测车施加牵引载荷,在实际试验中,很难对被
Traction test is an important means for comprehensive evaluation of the dynamic and economic performance of agricultural power tools such as tractors and tractor ships. At present, the traction test method at home and abroad is to use the load truck to apply the traction load to the tractor or the cultivator under test, and then record all the parameters of the tested vehicle by means of electrical measurements. This loading method is to rely on people to control the load vehicle, the load vehicle and the measured vehicle to maintain a relatively stable speed difference, to be applied to the measured vehicle traction load, in the actual test, it is difficult to be