METHOD OF DETERMINATION OF FRICTION COEFFICIENT BETWEEN WHEEL AND SURFACE AND ITS IMPLEMENTATION DEVICE
Abstract:
Invention lies in the field of measuring equipment for determination of frictional parameters of surfaces of aerodrome runways or road pavements.The method includes rolling motion of a measuring wheel by a vehicle on a monitored surface, determination of its motion speed, force of its normal load on a surface and its angular rotational velocity, application of braking moment to the axle of a wheel by means of electromagnetic induction brake, rotor of which is connected to the axle of the wheel, determination of a sliding coefficient of the wheel, change of braking moment to make current value the sliding coefficient closer to the assigned value, determination of force of traction between the wheel and the surface using an analog sensor of magnetic flux density mounted on the stator of electromagnetic brake between the poles of the latter, and determination of friction coefficient between the wheel and the surface.The device includes a frame installed on a vehicle, electromagnetic induction brake, stator of which is installed on the frame, a measuring wheel installed on brake rotor shaft, pressure force transducer, angular rate sensor of the wheel, an element of vehicle's speed determination, sensor of force of traction between the wheel and monitored surface made as an analog sensor of magnetic flux density and installed on brake stator between its poles, a computing block and a control unit.Technical result consists in increase of accuracy of friction coefficient determination, in simplification of design and reduction of dimensions and weight of the device.
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