Pavement power spectrum measuring method based on vertical dynamic load of wheel

Abstract

The invention discloses a pavement power spectrum measuring method based on a vertical dynamic load of a wheel. The method is implemented based on a designed test vehicle provided with a six-componentinstrument. The method includes the steps: firstly, acquiring a vertical dynamic load signal of a test vehicle tire by the aid of the wheel six-component instrument; secondly, building a relationshipbetween pavement roughness and the vertical dynamic load of the wheel, and calibrating an amplification factor of the test vehicle to obtain a pavement power spectrum; finally, identifying pavement roughness characteristics according to a power spectrum of the vertical dynamic load. According to the pavement power spectrum measuring method based on the vertical dynamic load of the wheel, the influence on a true value of the pavement roughness caused by pavement cleanliness is reduced, the method has good measuring dynamic stability, the designed test vehicle avoids vertical dynamic loads caused by vibration of an engine and rotation of a transmission system, measuring accuracy of vertical dynamic load spectrum of the wheel is improved, a pavement roughness characteristic identifying method is simple and visual, and a pavement is conveniently evaluated by workers.

Description

technical field [0001] The invention belongs to the field of road surface feature recognition, and in particular relates to a road surface power spectrum measurement method based on wheel vertical dynamic load. Background technique [0002] The power spectral density function of the road surface is often used to represent the roughness of the road surface, and is used as the input unit for calculations such as vehicle dynamic response, suspension optimization and control, etc., and its description precision and accuracy directly affect subsequent research. [0003] At present, the indirect measurement methods of acceleration sensors and laser sensors are mostly used for the collection and measurement of road surface power spectrum, which leads to problems such as large measurement errors, expensive equipment, and small application range. Among them, the commonly used laser profiler based on inertial reference has many disadvantages: (1) in the road surface detection, the sur...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of large measurement error, poor dynamic stability and small application range in the existing road surface power spectrum measurement technology, the present invention provides a road surface power spectrum measurement method based on wheel vertical dynamic load

Images