Method for testing electro-magnetic compatibility of automotive CAN (controller area network) buses based on semi-physical simulation

Abstract

The invention provides a method for testing electro-magnetic compatibility of an automotive CAN (controller area network) bus based on semi-physical simulation, belonging to the technical field of design and development of electro-magnetic compatibility of an automobile. The method comprises the following steps: step 1. building an automotive empty shell table frame of which the full size is 1:1 according to the actual situation of the electro-magnetic compatibility of the automobile; step 2. simulating and injecting the interference signals; step 3. monitoring the response of the automotive CAN bus on the interference signals; step 4. estimating the EMC (electro-magnetic compatibility) property of the CAN bus by using an estimating system; and step 5. observing the electro-magnetic compatibility of the automotive CAN bus in real time. With the adoption of the method, the shortcoming of the traditional method for testing the electro-magnetic compatibility of the automotive CAN bus is made up. Based on a forecasting platform of the semi-physical simulation of the electro-magnetic compatibility, research staff can implement the electro-magnetic compatibility design at various development stages such as the scheme formulating, sample manufacturing, sample testing, and testing of the system, so that the problems that the traditional electro-magnetic compatibility design is not complete and the electro-magnetic compatibility rectification has no effect can be solved.

Description

technical field [0001] The invention belongs to the technical field of automobile electromagnetic compatibility design and development, in particular to an automobile CAN bus electromagnetic compatibility performance test method based on hardware-in-the-loop simulation. This method can more accurately reflect the real electromagnetic environment of the automobile CAN, and is more conducive to the electromagnetic compatibility rectification of the automobile CAN bus. Background technique [0002] CAN is the abbreviation of Controller Area Network, that is, Controller Area Network, which is a kind of multiplex transmission system. Its good cost performance and reliability have been widely used in recent years. The emergence of CAN data bus effectively solves the defects of too many wiring harnesses in traditional automobiles, too large volume, and a large number of control signals in the integrated control system that cannot be exchanged in real time. It is widely used in the...

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Problems solved by technology

[0005] However, simply using the ISO7637-3 standard test waveform for the test cannot completely simulate and reflect the electromagnetic interference in the vehicle that the actual vehicle CAN bus receives

Usually, the EMC test of the automotive CAN bus is carried out in the late stage of the development of the vehicle system, which brings great inconvenience to the rectification after the EMC problem of the automotive CAN bus is found, and delays the development time of the entire automotive system

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