Interconnected air suspension cooperative control system and method based on MPC

Abstract

The invention relates to an interconnected air suspension cooperative control system and method based on MPC in the field of semi-active suspension system control of vehicles. The cooperative controlsystem is composed of a sensor module, an expansion observer module, an MPC controller, a damping coefficient controller, an interconnection state controller, a vehicle body height controller, a damping coefficient executing mechanism, an interconnection state executing mechanism and a vehicle body height executing mechanism. The MPC controller starts from the top layer; the influence of a dampingcoefficient, an interconnection state and a vehicle body height on the performance is always attributed to the suspension force provided by respective actuating mechanisms; optimization of suspensionperformance indexes is taken as an optimization target. The optimal suspension force is generated by controlling corresponding actuating mechanisms through a damping coefficient controller, an interconnection state controller and a vehicle body height controller in sequence; the optimal suspension force of the system is solved through the MPC controller, then the optimal suspension force is distributed through the damping coefficient, the interconnection state and the vehicle body height executing mechanism in sequence, the control precision is improved, and the system and method are suitablefor control under any working condition.

Description

technical field [0001] The invention relates to the control technology of a semi-active suspension system of a vehicle, in particular to a system and method for synergistically controlling the damping coefficient, interconnection state and body height of an interconnected air suspension. Background technique [0002] With the increasing number of controllable structures in the suspension system, the coordinated control of damping coefficient, body height and interconnection state becomes a way to obtain better suspension performance. For example, the Chinese patent publication No. CN105082920B proposes a damping and body height adjustable interconnected air suspension collaborative control system and method. It first formulates the interconnection state control strategy, body height control strategy and damping control strategy, and establishes The coordination controller coordinates the work of the interconnection state control system, vehicle body height control system and...

AI Technical Summary

Problems solved by technology

[0004] Based on the problems of poor control accuracy and poor portability in the existing interconnected air suspension collaborative control, the present invention proposes an MPC-based interconnected air suspension collaborative control system and a control method for the system to realize the interconnected air suspension damping coefficient , interconnection status and body height to further enhance the overall performance of the interconnected air suspension system

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