Control method of automobile electronically controlled semi-active suspension system

Abstract

The invention discloses a control method for an electronically controlled semi-active suspension system of an automobile, which is applied to a semi-active suspension system including an electronically controlled variable damping shock absorber, and the control method is included after working condition identification and driving style determination The top-level mode control of the allocation algorithm and dynamic adjustment parameters, and the bottom-level algorithm control of the specific implementation of the control algorithm, the steps include: (1) collecting vehicle driving state parameters and driver model information; (2) identifying working conditions according to the state information , switch the top-level mode, and determine the corresponding bottom-level control algorithm; (3) apply full-state damping control and hybrid control, dynamically adjust the weight and parameters of the control algorithm, and output the control signal of the electronically controlled variable damping shock absorber. The present invention can utilize the structure of the existing electronically controlled semi-active suspension system to identify the driving style of the driver and the driving conditions of the vehicle, and realize the dynamic selection and adjustment of the underlying control method and parameters, thereby accurately optimizing the electronically controlled semi-active suspension system. Suspension system performance.

Description

technical field [0001] The invention relates to the field of electronically controlled semi-active suspension control algorithms, in particular to a layered control method for automobile electronically controlled semi-active suspension systems. Background technique [0002] As an important part of a car, the suspension system plays an important role in affecting the driving quality, ride comfort and handling stability of the car. Since the suspension system was invented, the traditional non-adjustable passive suspension has occupied the main volume. However, due to the unpredictability and randomness of changes in the external and self-conditions such as the road surface the car is driving on, it is inevitable that the suspension system has adjustable parameters. Therefore, the semi-active suspension based on the electronically controlled variable damping shock absorber came into being. Its appearance aims to solve the balance problem of comfort and handling stability, so a...

AI Technical Summary

Problems solved by technology

The existing control algorithms are mainly single-structure control strategies, whose core is mainly a single algorithm, but the adjustable space of a single algorithm is limited, and it is often impossible to achieve a good balance in the consideration of tendencies, so such as ceiling Under the condition that the control algorithm focuses on improving comfort, there will be a problem of reducing handling stability

Moreover, most of the current semi-active suspension control strategies simply combine the control effects of the quarter suspension, and divide the vehicle suspension into multiple quarter suspensions for separate control, which cannot be achieved theoretically. Based on the optimization of vehicle performance

The existing solution is often to optimize the parameters of the multi-objective control strategy multiple times, but with the determination of the parameters, the focus and characteristics of the control effect will be fixed, and it is impossible to flexibly optimize the ride comfort and handling stability. balance in real time

[0004] At present, the existing semi-active suspension control algorithm can only achieve the manual / automatic switching of the mode at most, and cannot break through the shackles of the single-structure control strategy, which limits the full performance of the semi-active suspension. The popularity of semi-active suspension systems is limited

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