Measuring method for motion resistance coefficient of cross-country roads

A technique of motion resistance and measurement method, which is applied to measuring devices, instruments, and mechanical devices, etc., can solve problems such as insufficient accuracy of results, and achieve good guiding significance.

Active Publication Date: 2014-11-26
CHINA NORTH VEHICLE RES INST
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Problems solved by technology

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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  • Measuring method for motion resistance coefficient of cross-country roads
  • Measuring method for motion resistance coefficient of cross-country roads

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Embodiment Construction

[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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Abstract

The invention discloses a measuring method for the motion resistance coefficient of cross-country roads. The measuring method comprises the steps of (S1) measuring a relation Eta2 between the efficiency and the speed of an action system of a caterpillar vehicle; (S2) obtaining a driving torque T by using the driving torque of an engine under different speeds to deduct the loss of an auxiliary system; and (S3) calculating the motion resistance coefficient of the cross-country roads according to the formula, namely f=(tEta1Eta2/r-FA)/G, wherein f is the motion resistance coefficient, Eta1 is the efficiency of an engine transmission system, r is the radius of a driving wheel of the caterpillar vehicle, F is the air resistance applied to the vehicle, and G is the weight of the caterpillar vehicle. The measuring method disclosed by the invention has the advantages that by a simple and effective method, the factors such as the internal resistance of the action system and the influence on the resistance coefficient caused by the speed are considered, so that the motion resistance coefficient of the cross-country roads is accurately measured; and the measuring method has good guiding significance on application and research of engineering.

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...

Claims

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Application Information

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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
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