An MPC-based interconnected air suspension cooperative control system and method

Abstract

The invention relates to an MPC-based interconnected air suspension cooperative control system and method in the field of vehicle semi-active suspension system control. The cooperative control system consists of a sensor module, an extended observer module, an MPC controller, a damping coefficient controller, The interconnection state controller, vehicle body height controller, damping coefficient actuator, interconnection state actuator and body height actuator are composed; the MPC controller starts from the top layer and always attributes the influence of damping coefficient, interconnection state and body height on performance to their respective Suspension force provided by the executive agency, with the optimal suspension performance index as the optimization goal, the optimal suspension force is generated by the damping coefficient controller, the interconnection state controller and the vehicle height controller to control the corresponding actuator in turn, through the MPC The controller solves the optimal suspension force of the system, and then distributes the optimal suspension force sequentially through the damping coefficient, interconnection state and body height actuator, which improves the control accuracy and is suitable for control under any working conditions.

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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