State feedback control method of automobile active suspension based on event triggering

An active suspension and event-triggered technology, applied to suspensions, elastic suspensions, vehicle components, etc., can solve the problems of redundant calculations, large actuator losses, waste of communication and computing costs, etc.

Active Publication Date: 2018-07-06
SHANXI UNIV
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of existing active controllers such as many redundant calculations, large actuator losses, and waste of communication and calculation costs, and to provide an event-based active suspension state feedback control method for automobiles

Method used

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  • State feedback control method of automobile active suspension based on event triggering
  • State feedback control method of automobile active suspension based on event triggering
  • State feedback control method of automobile active suspension based on event triggering

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Embodiment Construction

[0061] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0062] A kind of event-triggered based vehicle active suspension state feedback control method in this embodiment, its control step is:

[0063] (1) Establish the state space mathematical model of the vehicle active suspension system

[0064] Such as figure 1 As shown, for the 1 / 4 car body model with two degrees of freedom, the dynamic equation is established as:

[0065]

[0066]

[0067] Among them, m s Represents the sprung mass, m t represents the unsprung mass; c s stands for suspension damping, c t represents tire damping; k s represents the suspension spring stiffness, k t represents tire stiffness; z s represents the displacement of the sprung mass, z t represents the displacement of the unsprung mass; z r represents the displacement excitation of the road surface; u(t) is the control input of the active suspension syst...

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Abstract

The invention relates to a state feedback control method of an automobile active suspension based on event triggering. The method mainly solves the technical problems of an existing active controllerof heavy redundant operation, large actuator loss and communication waste. According to the technical scheme, the state feedback control method of the automobile active suspension based on event triggering comprises the control steps that 1, a state space math model of an automobile active suspension system is established; 2, an information transmission mechanism based on event triggering is established; 3, an H8 controller based on event triggering is determined. According to the method, the information transmission mechanism based on event triggering is adopted in the feedback control of theactive suspension system, and the relationship between the threshold condition parameters in the mechanism and the control performance indexes as required by the system is established. Thus, transmission and computing of redundant sampling data are effectively reduced on the basis of ensuring the system performance, the information transmission quantity of the suspension system is effectively decreased, and communication and computing resources are saved.

Description

technical field [0001] The invention relates to an event-triggered state feedback control method for an automobile active suspension, which belongs to the technical field of automobile active suspension control. Background technique [0002] Automotive suspensions are playing an increasingly important role in the design of modern high-end vehicles. The feedback control design of automotive active suspension has also attracted the attention of many researchers. Most scholars have devoted themselves to proposing different active control strategies to improve suspension performance. Considering human ride comfort and operational safety as important indicators, the active suspension can adopt specific control strategies (such as optimal control, robust H ∞ Control, sliding mode control, etc.), provide variable damping force, suppress the excessive vibration of the automobile suspension, and make it in the optimal vibration reduction state. [0003] The active controller needs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/018G06F17/50G06F17/16
CPCB60G17/018G06F17/16G06F30/15
Inventor 关燕鹏要会娟
Owner SHANXI UNIV
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