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Vehicle height and damping cooperative control method for air suspension

An air suspension and cooperative control technology, applied in suspension, elastic suspension, vehicle components, etc., can solve the problems of low penetration rate of interconnected air suspension, single control effect, poor coordination of vehicle height and damping control, etc.

Pending Publication Date: 2022-02-18
中汽院(江苏)汽车工程研究院有限公司
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Problems solved by technology

Patent CN202011521864.X applies MPC control to electronically controlled air suspension, but it is limited to the control of vehicle height, and the control effect is single
Patent CN105082920B realizes the coordinated control of interconnected air suspension damping and vehicle height, but the control system is too complicated, and the control object is the interconnected air suspension with a low penetration rate, which is not suitable for the common electronically controlled air suspension on the market
[0003] To sum up, in the prior art, there is a problem of poor synergy between the vehicle height and damping control of the air suspension

Method used

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  • Vehicle height and damping cooperative control method for air suspension
  • Vehicle height and damping cooperative control method for air suspension
  • Vehicle height and damping cooperative control method for air suspension

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0047] The vehicle height and damping cooperative control method of the air suspension proposed in this application is realized based on MPC control. MPC control is a new type of control method developed in the process of industrial practice. It belongs to optimal control and has good performance. robustness. MPC control has outstanding advantages in dealing with the optimal goal with constraints in the limited time domain, which mainly includes three aspects: predictive model, rolling optimization and feedback correction. The basic principle of MPC control is to predict the future state of the sy...

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Abstract

The invention discloses a vehicle height and damping cooperative control method for an air suspension. The method comprises the following steps: establishing a vehicle dynamics model of the air suspension, and carrying out linearization processing and discretization processing; selecting a Kalman observer as a whole vehicle observer, and processing the whole vehicle state information by using the Kalman observer; sending the observation data to the MPC controller; formulating a control target and a cost function of the MPC controller by combining the discretized whole vehicle state equation and the observation data, and outputting a suspension force F according to the control target and the cost function; setting constraint of the control quantity of the MPC, and if the obtained suspension force meets the constraint, outputting the suspension force as the optimal target suspension force of the suspension system; and according to the optimal target suspension force output by the MPC controller, determining specific actions of the adjustable damping shock absorber and the vehicle height inflation and deflation electromagnetic valve and feeding back to act on the whole vehicle, and then vehicle height and damping cooperative control is achieved.

Description

technical field [0001] The invention relates to a semi-active air suspension control technology, in particular to a vehicle height and damping cooperative control method of an air suspension. Background technique [0002] With the gradual increase of consumers' requirements for car comfort, air suspension has been widely used because of its good stiffness and damping characteristics. In order to further improve vehicle performance, the coordinated control between the various actuators inside the air suspension research focus. Patent CN202011521864.X applies MPC control to electronically controlled air suspension, but it is limited to the control of vehicle height, and the control effect is single. The patent CN105082920B realizes the coordinated control of interconnected air suspension damping and vehicle height, but the control system is too complicated, and the control object is the interconnected air suspension with a low penetration rate, which is not suitable for the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/018B60G17/052B60G17/06
CPCB60G17/0182B60G17/0528B60G17/06B60G2500/302B60G2800/914B60G2500/10
Inventor 宋净曾敬刘力新王烨王文豪向华荣曾帅
Owner 中汽院(江苏)汽车工程研究院有限公司
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