Magnetorheological damper control system and method based on Hammerstein model

Abstract

The invention discloses a magnetorheological damper control system based on a Hammerstein model. The magnetorheological damper control system comprises a three-step method controller module, an MRD inverse model module and an MRD system module. The three-step method controller module comprises a steady-state-like control module, a reference dynamic feedforward control module and an error feedback control module. And the MRD inverse model module adopts a BP neural network for training. An MRD system module is established by adopting a Hammerstein model, a static nonlinear block adopts a BP neural network, and a dynamic linear block adopts a transfer function. According to the method, effective tracking control over the MRD is achieved, meanwhile, the controller designed based on the three-step method is clear in structure, control response is fast, robustness of the system to uncertainty is improved, and the defect that errors are brought to the system due to the fact that interference cannot be eliminated through open-loop control is overcome.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a control system and method for a magneto-rheological damper based on a Hammerstein model. Background technique [0002] Suspension is an integral part of the vehicle driving system, and its performance directly determines the ride comfort, handling stability and driving safety of the vehicle. Therefore, the vehicle has an urgent need for a suspension system with superior performance. Semi-active control has great research value and application development value because of the excellent control effect of active control and the simple and easy advantages of passive control, and is widely used in vehicle suspension systems. [0003] In recent years, researchers have developed a variety of dampers with adjustable coefficients. Among them, the magnetorheological damper (Magneto-rheological damper, MRD) with magnetorheological fluid as the medium has the advantages of simp...

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Problems solved by technology

[0010] In order to solve the above problems, the present invention provides a magneto-rheological damper control system and method based on the Hammerstein model, which has anti-interference performance and can track the expected damping force very well, and solves the problem that the MRD open-loop control cannot eliminate the interference caused by the system. To solve the error problem, avoid the heavy calculation of parametric model inversion, and the structure of non-parametric inverse model is complex, that is, the contradiction between precise control and complex inversion

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