Suspension force acquisition method and device of automobile suspension system

Abstract

The embodiment of the invention provides a suspension force acquisition method and device for an automobile suspension system. The method comprises the following steps: processing a suspension strain gauge measurement signal through a strain gauge conversion function to obtain a suspension force initial measurement signal, performing simulation by utilizing the suspension force initial measurement signal, a transmission shaft torque measurement signal and a wheel center load measurement signal to obtain a first suspension acceleration simulation signal, performing simulation by utilizing the transmission shaft torque measurement signal and the wheel center load measurement signal to obtain a second suspension acceleration simulation signal and a suspension force initial simulation signal, obtaining a suspension acceleration simulation target signal based on the first suspension acceleration simulation signal and the suspension acceleration measurement signal, and processing the second suspension acceleration simulation signal and the suspension acceleration simulation target signal by using a preset PID model on this basis to obtain a target suspension force signal. The structure of the suspension system does not need to be changed, the measurement error is reduced, and meanwhile, the compatibility of vehicle types is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a suspension force acquisition method and device for an automobile suspension system. Background technique [0002] The suspension system of the car is used to connect the powertrain and the body (or sub-frame), and the suspension system is an important force transmission structure. The most basic function of the suspension system is to support the powertrain. Therefore, when designing the suspension system, it is necessary to ensure that the vehicle powertrain is in a reasonable position and the entire suspension system has sufficient service life. [0003] Secondly, when the powertrain is under the influence of transient conditions such as startup, flameout, vehicle acceleration and deceleration, and various disturbances (such as ground bumps), the suspension system should be able to effectively limit the maximum displacement of the powertrain to avoid Collision between th...

AI Technical Summary

Problems solved by technology

[0005] The embodiments of the present invention provide a method and device for obtaining the suspension force of the automobile suspension system, which solves the technical problems of high measurement error and low compatibility with vehicle types in the related art when obtaining the suspension force of the automobile

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