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Vehicle semi-active suspension integrated control method and control system

A semi-active suspension and integrated control technology, applied in the direction of suspension, elastic suspension, vehicle components, etc., can solve the problems of affecting the driving experience, poor body posture improvement effect, etc., to improve stability, restrain roll and pitch , the effect of simple control structure

Active Publication Date: 2021-04-16
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a vehicle semi-active suspension integrated control method and control system to solve the problem of the existing shock absorption control system Posture improvement effect is poor, affecting the driving experience

Method used

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  • Vehicle semi-active suspension integrated control method and control system
  • Vehicle semi-active suspension integrated control method and control system
  • Vehicle semi-active suspension integrated control method and control system

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Experimental program
Comparison scheme
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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] Method example:

[0031] Such as figure 1 The semi-active control schematic diagram based on the 1 / 4 suspension vibration model shown, including sprung mass 1, passive spring 2, passive shock absorber 3, active force actor 4, unsprung mass 5, tire vertical spring 6; Z in the figure s is the sprung mass displacement, Z u is the unsprung mass displacement, Z r is the ground vibration displacement.

[0032] The calculation process of active force is:

[0033]

[0034] Rewritten in matrix form as:

[0035]

[0036] Among them, x=[x 1 x 2 x 3 x 4 ]T , x 1 = Z s -Z u , x 3 = Z u -Z r ,

[0037]

[0038] The optimal solution objective is:

[0039]

[0040] In the formula, ρ 1 , ρ 2 , ρ 3 and ρ 4 are the weighting coefficients of the optimal control indicators, respectively.

[0041]

[0042] In the formula, C 1 an...

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Abstract

The invention relates to a vehicle semi-active suspension integrated control method and a control system. The method comprises the following steps: obtaining control damping to control a suspension: if a vehicle is about to roll laterally, enhancing the damping according to lateral acceleration, and then controlling the suspension; if the vehicle is about to pitch, enhancing the damping according to the longitudinal acceleration, and then controlling the suspension; and if the vehicle is about to roll and pitch, enhancing and superposing the damping according to the lateral acceleration and the longitudinal acceleration to serve as control damping to control the suspension. According to the method, roll and pitch principles are combined, the suspension damping is actively adjusted according to a vehicle body posture (pitch and roll) in the vehicle driving process, intervention is performed in advance, roll and pitch of the vehicle body are effectively restrained on the basis that vehicle riding comfort and driving safety are both considered, and the stability of the vehicle driving posture is improved.

Description

technical field [0001] The invention relates to a vehicle semi-active suspension integrated control method and a control system, belonging to the field of vehicle suspension control. Background technique [0002] At present, the suspension structure of most automobiles is composed of elastic elements, guiding mechanisms and shock absorbers, etc., and its main function is to attenuate and transmit road vibration. In order to meet people's higher and higher requirements for vehicle ride comfort, a large number of studies on the characteristics and control of the suspension vibration system have been carried out. By establishing different suspension vibration models, the influence of suspension stiffness and damping on vibration frequency characteristics (transmission rate and power spectral density) is analyzed, and different evaluation methods are developed. After analyzing the impact mechanism, it is necessary to optimize the suspension stiffness and damping to achieve vibr...

Claims

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Application Information

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IPC IPC(8): B60G17/015
Inventor 丁金全郭耀华钟磊李元伟
Owner ZHENGZHOU YUTONG BUS CO LTD
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