A method for measuring resistance coefficient of cross-country road surface movement
A technology of movement resistance and measurement method, which is applied in the direction of measuring devices, instruments, and mechanical devices, etc., can solve the problem that the results are not very accurate, and achieve a good guiding effect
Active Publication Date: 2016-08-17
CHINA NORTH VEHICLE RES INST
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In the past, the measurement methods for the resistance coefficient of off-road road surface movement used in the design of tracked vehicles mainly include the traction method and the inertia method, but the movement resistance measured by the above two measurement methods is not only caused by ground deformation, but also includes road wheels and The internal resistance part of the action system, such as the friction between the tracks and the friction of the road wheel bearing, does not consider the influence of the vehicle speed. The measured resistance coefficient of off-road road movement is a constant value that has nothing to do with the vehicle speed, and the result is not very accurate.
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[0022] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0023] In order to realize that the measured resistance coefficient of tracked vehicles does not include the internal resistance of the action system, but includes the influence of vehicle speed on the resistance coefficient, so that the measurement of the resistance coefficient is more accurate, the present invention provides a method for determining the resistance coefficient of off-road road movement, referring to figure 1 and figure 2 As shown, it specifically includes the following steps:
[0024] (1) Measure the relationship between the efficiency of the tracked vehicle action system and the speed of the vehicle
[0025] First park the tracked vehicle in the following figure 1 The shown electric drive test ben...
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The invention discloses a method for measuring the resistance coefficient of off-road road movement, which comprises the following steps: S1: Measure the relationship η between the efficiency of the action system of the tracked vehicle and the speed of the vehicle 2 ; S2: Obtain the driving torque T after deducting the loss of the auxiliary system from the engine driving torque at different vehicle speeds; S3: Calculate the motion resistance coefficient f=(Tη of the off-road road surface 1 n 2 / r‑F A ) / G, where f is the kinetic resistance coefficient, η 1 is the efficiency of the engine transmission system, r is the radius of the driving wheel of the tracked vehicle, F A is the air resistance of the vehicle, and G is the weight of the tracked vehicle. Through a simple and effective method, the invention takes into account the internal resistance of the action system, the influence of vehicle speed on the resistance coefficient and other factors, and accurately measures the motion resistance coefficient of the off-road road surface, which has good guiding significance for engineering application and research.
Description
technical field [0001] The invention belongs to the relevant technical field of military tracked vehicles and various tracked engineering vehicles, and relates to a method for measuring the resistance coefficient of off-road road movement. Background technique [0002] For the overall design of tracked military vehicles and engineering vehicles, it is of great significance to determine the resistance coefficient of off-road road surface movement, because the off-road road surface resistance coefficient will affect the average off-road speed of the vehicle, and then affect the overall vehicle designer's selection of power devices. In the past, the measurement methods for the resistance coefficient of off-road road surface movement used in the design of tracked vehicles mainly include the traction method and the inertia method, but the movement resistance measured by the above two measurement methods is not only caused by ground deformation, but also includes road wheels and T...
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IPC IPC(8): G01N19/00
Inventor 李剑峰范知友肖磊康忠崔岩范凤明葛立坤李睿
Owner CHINA NORTH VEHICLE RES INST