Parameterized control method for automotive active suspension system

A technology of active suspension and control method, which is applied in the direction of suspension, elastic suspension, vehicle components, etc., and can solve the problems of single control target and inability to dynamically adjust the control effect

Inactive Publication Date: 2018-01-16
GUANGZHOU UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0010] For this reason, the object of the present invention is to propose a parametric control method for the active suspension system of an automobile, which can effectively solve the problem that the design model of the existing suspension control technology is relatively simple, the control effect is not good, and the control target is single and cannot be dynamically controlled. The problem of adjusting the control effect can accurately and effectively adjust the driving stability of the car and improve the driving comfort, and the design of the parameterized controller in this method is simple and easy to implement

Method used

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  • Parameterized control method for automotive active suspension system
  • Parameterized control method for automotive active suspension system
  • Parameterized control method for automotive active suspension system

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Experimental program
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Effect test

Embodiment 1

[0148] In this embodiment, the parameters of the 1 / 2 vehicle active suspension system model are shown in Table 1 below:

[0149]

[0150] Table 1

[0151]In order to test the effect of the parameterized robust controller, the system parameters of the system are set as: γ=1, h=0.5. Then the parameter value of the parameterized robust controller is: b 7 =-5000,c 8 =-5000, b 8 =-500.

[0152] Specifically, for example, image 3 Indicates that during the driving process of the vehicle, the main road disturbance is a lumpy road disturbance, and its mathematical description is:

[0153]

[0154] Wherein, A and L are respectively the height and length of the road surface input, assuming A=0.05m, L=2m, then the driving speed of the car is V=50 (km / h).

[0155] Figure 4 expressed in image 3 The schematic diagram of the control force given by the parameterized robust controller under the block road disturbance. Depend on Figure 4 It can be seen that under such a contr...

Embodiment 2

[0158] In this embodiment, the difference from Embodiment 1 is: the load of the vehicle body has increased the vehicle body m s When the measured weight of the vehicle body changes, the parameters of the corresponding controller will change to meet the control requirements for the stability of the vehicle body, and other contents will not be repeated.

Embodiment 3

[0160] The difference between this embodiment and the first embodiment is that when the vehicle speed V changes, the parameters of the corresponding controller will change to meet the control requirements for the stability of the vehicle body, and other details will not be repeated here.

[0161] To sum up, according to the parameterized control method of the automobile active suspension system in the embodiment of the present invention, one-half of the automobile model is selected as the research object, and the dynamic situation of the spring and damping is considered, so as to achieve the purpose of precise control of automobile driving; considering Without modeling and external uncertain disturbances, a cluster of parameterized controllers is designed to stabilize the car while improving ride comfort and driving comfort to achieve the purpose of multi-objective control; through the designed adjustable parameters, according to the weight of the car body , driving speed, road...

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Abstract

The invention provides a parameterized control method for an automotive active suspension system. The parameterized control method comprises the following steps: (1) establishing a 1 / 2 automotive active suspension system model; (2) converting the 1 / 2 automotive active suspension system model into a dissipative Hamilton system model; (3) designing a parameterized robust controller for a 1 / 2 automotive active suspension system; (4) obtaining a parameter range of the parameterized robust controller; and (5) adjusting parameters of the parameterized robust controller to achieve optimal control forrunning stability of an automobile according to the parameter range. The parameterized control method for the automotive active suspension system of the invention can effectively solve the problems that the control effect is poor because design models of suspension control techniques in the prior art are relatively simple and the control effect can not be dynamically adjusted because the controlobjective is monotonous, thereby precisely and effectively adjusting the running stability of the automobile and improving the driving comfort. In addition, the design of a parameterized controller ofthe parameterized control method is simple and easy to implement.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a parameterized control method for an active suspension system of an automobile. Background technique [0002] Suspension is one of the important components of a car, mainly used to transmit all forces and moments between the car body and the wheels, and has the function of shock absorption and buffering. Suspension system has a great influence on various performances such as safety, passability, ride comfort, handling stability, and ride comfort of automobiles. Therefore, suspension system has always been a matter of great concern to automobile designers and researchers. In recent decades, a lot of research has been done on suspension systems to improve ride comfort and driving comfort and safety. At present, automobile suspension has developed from traditional passive suspension to semi-active suspension and active suspension. [0003] The active suspension can adjust the...

Claims

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Application Information

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IPC IPC(8): B60G17/015G06F17/50
Inventor 曹忠罗高涌赵文静饶永生邹宇黄勇李传中
Owner GUANGZHOU UNIVERSITY
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