Evaluation And Testing Of ARINC429 Aircraft Bus Data Transmission Correctness

With the continuous development of avionics techniques, more and more cables have be used on the aircraft to connect more and more airborne electronic equipments with each other,which leads to the fact that the electromagnetic environment on the aircraft has been much more complex than the past. Considering this serious situation, it is necessary to re-evaluate and test the reliability of data transmission on ARINC429 data bus.First, the protocols of ARINC429 data bus was studied, including data format, electrical characteristics and data analysis methods. Then, based on the Multi-conductor Transmission Line theory, related parameters was calculated which involved in the multi-conductor transmission line equations. The MATLAB and CST were employed to do the theoretical calculation and modeling respectively for the crosstalk of single cable to single cable, single cable to parallel lines and single cable to unshielded twisted pair cables, the comparison result has proved the validity and accuracy of the proposed model. On the basis of the above research, the crosstalk of single cable to shielded twisted-wire pairs was analyzed. Finally, a test platform of the ARINC429 data bus has been built to complete the crosstalk analysis between single cable and twisted pair cable,based on the hardware and LabVIEW software.With the test platform discussed above, the crosstalk effect induced on the ARINC429 data bus can be easily detected. Changing the routing structure of the ARINC429 cable, the influence on the quality of the transmitted data from different routing structure can be studied as well, and to pave the way when analysis crosstalk effect of complex cable structure in the future.