Method for measuring rolling friction coefficient between plane tire and track

Abstract

The invention relates to a method for measuring a rolling friction coefficient between a plane tire and a track, and belongs to the field of structural dynamics. A plane at least comprises two engines, calculation of the rolling friction coefficient includes the steps: firstly, adjusting throttles of m engines of the plane to the same positions, loosing a brake, enabling the plane to freely slide, and acquiring a first accelerated speed a1 of a barycenter course of the plane; secondly, adjusting throttles of n engines of the plane to the positions as same as those of the throttles of the m engines, loosing the brake, enabling the plane to freely slide, and acquiring a second accelerated speed a2 of the barycenter course of the plane. N is not equal to m. The two steps are simultaneously based on movement principles, relations between the rolling friction coefficient between the plane tire and the track and the accelerated speed of the barycenter course of the plane are built, and the rolling friction coefficient is obtained in a simultaneity manner. The method can rapidly obtain the rolling friction coefficient between the plane tire and the track in a tested manner and has an important engineering significance for evaluating taxiing performance of the plane.

Description

technical field [0001] The invention belongs to the field of structural dynamics, and in particular relates to a method for measuring the coefficient of rolling friction between an aircraft tire and a runway. Background technique [0002] The coefficient of rolling friction between the aircraft tire and the runway is one of the important parameters to evaluate the rolling performance of the aircraft. At present, when measuring the rolling friction coefficient between the aircraft tire and the runway, it is usually obtained by first measuring the total weight of the aircraft and the force that makes the aircraft move from rest to motion, and then calculating the ratio of the two. Since the weight of the aircraft changes frequently, the measurement of the force that makes the aircraft move from rest to motion requires extra manpower in addition to borrowing tractors, dynamometers and other test equipment. Therefore, the implementation is cumbersome and inefficient. Contents ...

AI Technical Summary

Problems solved by technology

Since the weight of the aircraft changes frequently, the measurement of the force that makes the aircraft move from rest to motion requires extra manpower in addition to borrowing tractors, dynamometers and other test equipment. Therefore, the implementation is cumbersome and the efficiency is very low.

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