Fuzzy switching control method for electric control system for damping multi-mode semi-active suspension

A technology of semi-active suspension and control method, which is applied in the direction of suspension, elastic suspension, geometric CAD, etc., which can solve the requirements of continuous input and discrete output of the controller, inaccurate control, and high model accuracy requirements, etc. question

Active Publication Date: 2020-02-28
JIANGSU UNIV
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Problems solved by technology

[0004]Especially for damping gear switching control, the traditional continuously adjustable suspension damping control method is no longer applicable, and cannot better realize the requirements of continuous input and discrete output of the controller , and the traditional control has a large amount of calculation, requires high model accuracy, and the control is not precise enough

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  • Fuzzy switching control method for electric control system for damping multi-mode semi-active suspension
  • Fuzzy switching control method for electric control system for damping multi-mode semi-active suspension
  • Fuzzy switching control method for electric control system for damping multi-mode semi-active suspension

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Embodiment Construction

[0048] In order to make those skilled in the art understand the characteristics of the technical solution of the present invention, the present invention will be described in detail below in conjunction with specific embodiments.

[0049] First step 1 establishes the semi-active suspension model, and determines the suspension damping range and gear division according to the optimal damping ratio. The vertical acceleration of the vehicle body is used as an index for judging comfort, and the dynamic load of wheels is used as an index for judging safety. According to the previously established semi-active suspension model, the response analytical formulas for comfort and safety under white noise vibration are obtained respectively:

[0050]

[0051]

[0052] In the formula: n 0 is the spatial frequency, v is the vehicle speed, G q (n 0 ) is the unevenness coefficient of the road surface.

[0053] respectively Get the optimal damping ratio of the suspension based on co...

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Abstract

The invention discloses a fuzzy switching control method for an electric control system for a damping multi-mode semi-active suspension. Firstly, sprung mass acceleration and unsprung mass acceleration are obtained by utilizing a sensor, and obtained acceleration signals are integrated to obtain speed and displacement signals of sprung mass and unsprung mass. The speed and displacement signals arefurther processed as a judgment basis of tension and compression states of a suspension and are used as input signals of a fuzzy controller to carry out fuzzy judgment, and opening and closing signals of two high-speed on-off solenoid valves of the suspension are output. The opening and closing signals control on-off states of the high-speed on-off solenoid valves, so that the suspension can provide a good vibration damping effect regardless of the state of a vehicle. According to the method, a good damping switching control effect of a suspension system can be realized, the defect that the traditional control calculation amount is large is avoided by utilizing the fuzzy control, and the vehicle driving smoothness is improved.

Description

technical field [0001] The invention relates to the field of automobile suspension system control, and specifically designs a fuzzy switching control method for automobile damping multi-mode semi-active suspension. Background technique [0002] In recent years, with the gradual improvement of people's requirements for vehicle ride comfort, the research of high-performance suspension system has attracted more and more attention. Compared with traditional passive suspensions and active suspensions, semi-active suspensions have broad prospects for development because they can better balance the performance, cost, and energy consumption of suspension systems. Generally speaking, the semi-active suspension of a vehicle realizes the adaptive adjustment of the damping characteristics of the suspension system through the damping continuously adjustable shock absorber. These different types of shock absorbers have excellent performance in damping adjustment, but they still face some...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/018B60G17/019G06F30/15
CPCB60G17/018B60G17/01908B60G2600/1879Y02T90/00
Inventor 陈龙马瑞
Owner JIANGSU UNIV
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