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Automobile suspension semi-active control method and system

A semi-active control and automobile suspension technology, applied in the direction of suspension, elastic suspension, vehicle components, etc., can solve the problems of poor real-time performance

Active Publication Date: 2020-10-20
JIANGXI UNIV OF TECH
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Problems solved by technology

[0003] Based on this, the present invention provides a semi-active control method and system for automobile suspension, which is used to solve the problem of poor real-time performance caused by online calculation of road surface roughness information in the prior art

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  • Automobile suspension semi-active control method and system
  • Automobile suspension semi-active control method and system

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Embodiment Construction

[0045] In order to facilitate a better understanding of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings of related embodiments. Embodiments of the invention are shown in the drawings, but the invention is not limited to the preferred embodiments described above. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough.

[0046] In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, ...

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Abstract

The invention provides an automotive suspension semi-active control method and system, and the method comprises the following steps: drawing an excitation characteristic curve according to the presetroad condition information, carrying out dynamic simulation, obtaining a standard dynamic response, and building a road surface unevenness level clustering model according to the standard dynamic response; transmitting the current vehicle dynamic response of the current vehicle to the clustering model for evaluation to obtain a current road surface unevenness level; matching a current vehicle speed and the current road surface unevenness level with the excitation characteristic curve to obtain a current excitation frequency; and when the current excitation frequency is larger than a preset frequency, adjusting the automotive suspension to be in an acceleration driving damping switching mode, and when the current excitation frequency is smaller than the preset frequency, adjusting the automotive suspension to be in a ceiling damping control mode. According to the method, the range of the current excitation frequency is quickly judged through offline calculation of a large amount of standard pavement information and offline construction of the clustering model, so that the problem of poor real-time performance caused by online calculation of pavement unevenness information is effectively solved.

Description

technical field [0001] The invention relates to the technical field of automobile suspension, in particular to a semi-active control method and system for automobile suspension. Background technique [0002] The excitation frequency of the road surface has an important impact on the ride comfort of the car, especially the semi-active suspension control technology, whose control effect is frequency-dependent. Research shows that the classic sky-hook maximum-minimum switching semi-active Control, when the unevenness of the road surface is excited at a low frequency near the natural frequency (1-2Hz) of the sprung mass, this control technology has a good damping effect, but when the vibration is excited in the middle and high frequency band with a higher excitation frequency of the road surface, The control method of Acceleration Driven Damping (ADD) shows the characteristics of being complementary to the ceiling damping. At present, the acquisition of road surface roughness i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60G17/015B60G17/06
CPCB60G17/015B60G17/06
Inventor 邱香吴晓建曹青松高小林
Owner JIANGXI UNIV OF TECH
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