A Holographic Optimal Sliding Mode Controller for Vehicle Active Suspension

Abstract

The invention discloses a holographic optimal sliding mode controller used for a vehicle active suspension. The controller is composed of a first solver and a second solver, the input of the holographic optimal sliding mode controller is a suspension system motion state vector of an h-1 working cycle, the output of the holographic optimal sliding mode controller is suspension control generator control force of an h working cycle, the h is an integer which is larger than zero, the output of the first solver is the input of the second solver, when the h working cycle is conducted, the input of the first solver is an extended state vector formed by combining the suspension system motion state vector of the h-1 working cycle and the suspension control generator control force U(h-1) of the h working cycle, when the h working cycle is conducted, the output of the second solver is suspension control generator control force U(h), and the U(h) is input to a suspension system to complete h control of the active suspension. According to the holographic optimal sliding mode controller, all suspension system structural information and expected performance information are considered, the optimal performance and better robust stability are obtained by the active suspension control system.

Description

technical field [0001] The invention belongs to the field of vehicle suspension control, and in particular relates to a controller for vehicle active suspension, which controls the suspension through an active control force generator that generates active control force. Background technique [0002] Suspension is the general term for the force transmission connection device between the vehicle frame (or body) and the axle (or wheel). According to the different working principles, it can be divided into passive suspension, active suspension and semi-active suspension. Traditional passive suspensions limit the further improvement of vehicle performance, and semi-active suspensions and active suspensions are expected to break through this limitation. Active suspension is to add an active control force generator that can generate active control force on the basis of passive suspension, so that the ride comfort of the vehicle can be optimized. The control method is one of the c...

AI Technical Summary

Problems solved by technology

[0008] For the existing optimal sliding mode controllers applied to active suspension, part of the structure and expected performance information is lost during the construction of the optimal sliding mode flow function, which leads to the controller designed according to the optimal sliding mode flow function Due to the defects that the active suspension cannot obtain the optimal performance under the nominal working conditions, and the robustness is poor under the conditions of variable working conditions, the present invention provides a holographic optimal suspension without losing any system structure and expected performance information Sliding mode controller to ensure that the active suspension obtains the real nominal optimal performance and better robust performance under variable working conditions

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