ICD (interface control document)-oriented RS422 bus signal simulation testing method

Abstract

The invention relates to an ICD-oriented RS422 bus signal simulation test method. The simulation test is carried out in a simulation system. The simulation system includes a tested avionics equipment, a test platform and a simulator, and an RS422 bus simulation module is installed in the test platform. Controlled by the simulator, the simulator sends the simulation test signal to the avionics equipment under test through the RS422 bus simulation module according to the requirements of the ICD interface protocol. The value is automatically solved and the simulation signal is output and the original code value is recovered as the step of solving the parameter engineering value. Using this method reduces the complexity of the simulation test, not only can carry out the RS422 bus interface communication performance test, but also can carry out the simulation test for the engineering value of the parameters, and comprehensively test the correctness of the ICD interface protocol information.

Description

technical field [0001] The invention belongs to the simulation test technology, and relates to an ICD-oriented RS422 bus signal simulation test method based on a VXI bus module and applied in the technical field of avionics. Background technique [0002] RS422 bus communication technology has been widely used in various aircrafts today, and it is a relatively commonly used data communication bus. [0003] The ICD (Interface Control Document) interface control file describes the definition of the bus data of the avionics system, including the physical layer and logical link layer of the system, the communication protocol of the bus, the verification method, the meaning of the physical quantity parameters of the data, the proportional relationship, the physical quantity Various information such as the unit, coding form, fault code, etc. [0004] At present, many RS422 bus signal simulation test methods used in avionics systems only realize the basic communication performance ...

AI Technical Summary

Problems solved by technology

[0004] At present, many RS422 bus signal simulation test methods used in avionics systems only realize the basic communication performance test of the RS422 bus, not for specific ICD requirements, and do not perform simulation tests and calculations for the physical quantities (ie engineering values) of RS422 data. ; Or only make a special test equipment for the ICD of a specific avionics equipment, but do not form a general RS422 signal simulation test equipment oriented to the ICD and configurable signals

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