System and method for online recognition of road unevenness

A technology of uneven road surface and identification method, which is applied in the field of vehicles, can solve the problems of increasing operating costs and extremely high sensitivity requirements, and achieve the effects of reducing product costs, less real-time calculations, and improving response speed

Inactive Publication Date: 2015-01-28
JIANGSU UNIV
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Problems solved by technology

Tire vibration information is less affected by the stiffness and damping of the suspension, but this invention involves the secondary integration of the vibration information

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  • System and method for online recognition of road unevenness
  • System and method for online recognition of road unevenness
  • System and method for online recognition of road unevenness

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[0026] The present invention will be further described below in conjunction with the drawings and specific embodiments, but the protection scope of the present invention is not limited to this.

[0027] Such as figure 1 As shown, the road unevenness detection system involved in the present invention includes a power supply module, an acceleration sensing system, a vehicle speed information acquisition system, a signal preprocessing module, and a road unevenness calculation module.

[0028] The power module is used to provide electric energy;

[0029] The acceleration sensing system includes a plurality of acceleration sensors arranged at the corresponding unsprung positions of the suspension for collecting unsprung mass acceleration signals;

[0030] The vehicle speed information collection system is used to collect vehicle speed information;

[0031] The signal preprocessing module is used to amplify, filter, and reduce noise processing of unsprung mass acceleration signals and vehicl...

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Abstract

The invention provides a system and a method for online recognition of road unevenness. The system comprises a power source module, an acceleration sensing system, a vehicle speed information collecting system, a signal preprocessing module and a road unevenness calculating module. The method includes that road tests are performed on a sample vehicle on two roads different in grade, a linear relation between a quotient of an unsprung mass vertical acceleration mean square value of the vehicle model and vehicle speed and a road unevenness coefficient is demarcated; when the vehicle travels, each unsprung mass vertical acceleration of the vehicle and vehicle traveling speed information are collected; the collected information is compared with a demarcation result of the sample vehicle of the vehicle model, and current road unevenness can be acquired in real time. Compared with current similar technology, the system has the advantages of high transportability, quickness in operation and the like, and is nonsensitive to stiffness damping coefficient change of a suspension and especially suitable for active and semi-active suspension control systems variable in stiffness damping, and robustness of the system can be guaranteed.

Description

technical field [0001] The invention belongs to the field of vehicles, in particular to an online identification system and method for road surface roughness. Background technique [0002] With the development of automobile technology and the improvement of people's living standards, people put forward higher and higher requirements for the ride comfort and handling stability of vehicles. Active and semi-active suspension can improve the adaptability of the vehicle to different driving conditions and improve its comprehensive dynamic performance by adjusting the suspension stiffness, damping and other parameters. Road roughness is an important control basis for many active and semi-active control strategies. Therefore, road roughness detection technology has a very important impact on the control quality. [0003] Experts and scholars at home and abroad have proposed a variety of road surface roughness detection methods, including road surface detection methods based on las...

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Application Information

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IPC IPC(8): B60G17/0195
Inventor 李仲兴琚龙玉许荣洲江洪
Owner JIANGSU UNIV
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