Self-adaptive control method for automobile active suspension

An adaptive control and active suspension technology, which is applied in the field of vehicle engineering, can solve the problem that the accurate model of the automobile suspension system is difficult to obtain, the time variation of the suspension vibration isolation system and the road surface information are unpredictable, and the adaptive control cannot be realized efficiently and accurately To improve the control effect, overcome the influence of time-varying load, and improve the control performance
CN113879062APending Publication Date: 2022-01-04NANYANG NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NANYANG NORMAL UNIV
Publication Date
2022-01-04

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Abstract

The invention discloses a self-adaptive control method for an automobile active suspension, and belongs to the technical field of automobile engineering. The invention discloses a self-adaptive control method for an automobile active suspension. The self-adaptive control method comprises the following steps: S1, designing a nonlinear dynamic model of a system; S2, designing an unknown time-varying function to represent an uncertain part of the system; S3, designing a Fourier series-based function approximation method to estimate an unknown time-varying system function; and S4, designing a self-adaptive sliding mode control system. According to the method, the uncertain part of the system is estimated on line, the control force is calculated on line through the self-adaptive sliding mode controller, the influence of load and system parameter time varying can be better overcome, and compared with traditional PID control, the vibration reduction control performance of the system is greatly improved.
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Description

technical field

[0001] The invention relates to the technical field of vehicle engineering, in particular to an adaptive control method for an active suspension of an automobile. Background technique

[0002] The suspension system in the vehicle structure is an important part that affects the driving performance and ride comfort. Poor suspension system design not only makes the occupants feel uncomfortable, but also may cause the tires to separate from the ground instantly, which will affect driving safety. The traditional passive suspension system only uses components such as springs and dampers to store and dissipate energy. There are certain design characteristics restrictions on dynamic response, so it cannot have elastic changes to cope with the disturbance of the car body due to road bumps. Therefore, The choice of elastic coefficient and damping coefficient is particularly important. Since there is no external control force to suppress the disturbance of the car body...

Claims

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