Method and device of electromagnetic compatibility assessment of whole vehicle grounding system

Abstract

The present invention discloses a method and a device of electromagnetic compatibility assessment of a whole vehicle grounding system. The method comprises the steps of: identifying parts, in a wholevehicle, influencing electromagnetic compatibility; employing a vehicle body structure digital model in a whole vehicle design file to establish a vehicle body model; employing wiring harness digitalmodel related to parts influencing the electromagnetic compatibility in the wiring harness digital model in the whole vehicle design file to establish a grounding network wiring harness model; employing an equivalent circuit mode to establish a grounding point and grounding connection model; employing the equivalent circuit mode to establish an equivalent circuit model of parts influencing the electromagnetic compatibility for the ground; performing simulation of a model of whole vehicle grounding system electromagnetic compatibility analysis to obtain a coupling relation between an interference source part and a sensitive body part through the ground; and performing analysis of the coupling relation to determine the electromagnetic compatibility performance of the whole vehicle groundingsystem. Compared to the prior art, the method and the device of electromagnetic compatibility assessment of the whole vehicle grounding system achieve analysis of electromagnetic compatibility performances of the whole vehicle grounding system in whole vehicle electrical design phase.

Description

Technical field [0001] The invention relates to the technical field of vehicle electromagnetic compatibility, in particular to an electromagnetic compatibility evaluation method and device of a vehicle grounding system. Background technique [0002] The vehicle grounding system is a very important part of the vehicle's electrical and electronic architecture, and it is also one of the key factors affecting the electromagnetic compatibility of the vehicle. The electromagnetic compatibility problem of 2 / 3 of the vehicle is related to the grounding system. [0003] In view of the many complex effects of the vehicle grounding system on the electromagnetic compatibility performance of the vehicle, a complete set of design analysis methods is very needed. The electromagnetic compatibility performance of the grounding system is analyzed, evaluated and optimized in the early electrical design stage of the vehicle to ensure The design of the grounding system meets the electromagnetic compati...

AI Technical Summary

Problems solved by technology

However, due to the complexity of the problem, the prior art has very limited analysis of electromagnetic compatibility in the design of the grounding system, and lacks a systematic design analysis method. Generally, only electrical engineers or electromagnetic compatibility engineers analyze the electrical schematic diagram and grounding topology. Carry out a rough empirical evaluation, wait until the electromagnetic compatibility problem occurs in the later test stage, and then check and rectify the grounding system

[0004] The inventor found in the process of researching the existing technology that, on the one hand, testing and rectification will bring high additional costs and a long development cycle; on the other hand, the rectification of the grounding system involves electrical, cable, structure, etc. There are many aspects, and most of the designs in the later stage of testing have been basically finalized, and the implementation of the rectification project is relatively difficult, which increases the complexity of the problem and is not conducive to the implementation of technology

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