Damping control method of electronically controlled air suspension frame

Abstract

The invention provides a damping control method of an electronically controlled air suspension frame. A damping control process of the electronically controlled air suspension frame is decomposed into an automobile body high mode, an automobile body middle mode and an automobile body low mode under a straight driving working condition and a steering mode under a steering working condition; the damping control process is achieved according to a switching control strategy; fuzzy supervisory control is applied on a switching process among working modes through a fuzzy supervisory controller; output of a damping force local controller is gradually weighted and final control input of a system is obtained; and a switching basis between the straight driving working condition and the steering working condition is a turn angle of a steering wheel and a switching basis of the automobile body height is the automobile speed, road conditions and duration. The damping control method of the electronically controlled air suspension frame has the advantages of being capable of achieving that real-time tracking is performed on driving working conditions and supervisory control is performed on the switching process through the damping control process, solving the instability and oscillation problems of the system in a mode switching process and improving the integral performance of the electronically controlled air suspension frame under an overall situation working condition.

Description

technical field [0001] The invention relates to a damping control method of an electronically controlled air suspension, in particular to a method for decomposing the damping control process into multiple working modes and performing switching control on them. Background technique [0002] Compared with the traditional suspension, the electronically controlled air suspension can realize the active control of the vehicle body height and the adaptive adjustment of the damping, which plays an important role in improving the ride comfort, driving safety and fuel economy of the vehicle during driving. It has become a research hotspot in the field of vehicle engineering. With the development of air spring and adjustable damping shock absorber, the design of control system has become the bottleneck and key to realize the control function requirements of electronically controlled air suspension and improve the self-adaptive ability of electronically controlled air suspension. [00...

AI Technical Summary

Problems solved by technology

However, this method ignores other factors that affect the performance of the suspension. At the same time, it considers fewer working conditions and does not consider the optimization of damping under steering conditions. The damping of the shock absorber is adjustable in three gears. Suspension performance has improved somewhat, but the effect is not obvious

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