In terms of test objects, the tests of electronic and electrical systems are divided into three major categories: component tests, system tests, and vehicle – level tests. According to the test environment, they are divided into simulation tests, bench tests, real – vehicle static tests, and real – vehicle dynamic tests. According to the test items, they are divided as follows:
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Functional tests, which mainly test whether the functions of components meet the requirements of the requirements specification. For example, for the powertrain, there should be an anti – roll – back function on slopes no greater than 10%, a torque – control function, and a speed – control function. Therefore, these functions need to be tested, including on the bench and in the vehicle.
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Diagnostic tests, which are mainly tests of diagnostic services, including configuration parameter reading and writing, software upgrades, and fault code tests (including fault triggering, fault snapshots, extended data, fault aging, etc.). These tests are based on the diagnostic questionnaires released by the original equipment manufacturer (OEM).
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Network tests. Networks include CAN, LIN, Ethernet, Flexray, etc. Taking CAN as an example, it includes CAN conformance tests of the physical layer, network management tests, bus signal cycle deviation tests, Busoff tests, and signal interaction tests. Network tests also involve component and vehicle – level tests.
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EMC tests, which test whether the electromagnetic radiation of components and their immunity to electromagnetic radiation meet the requirements.
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Electrical performance tests, which test the performance of the vehicle’s electrical circuit system, including power distribution, grounding system, electrical balance, quiescent current, circuit reports, etc. Specific details are shown in the figure below.
Post time: Nov-08-2024
