Simulation and Fault Analysis on Electrical Characteristics of the GJB289A Bus Network

Abstract

Airborne GJB289A bus is used to realize the physical connection between various avionics equipment,and its reliability directly affects the normal operation of aircraft avionics system.In order to analyze the typical electrical fault characteristics of GJB289A bus network,according to the transformer,terminal resistance distribution parameters and lossy coupling transmission line model of GJB289A bus network,building a two port GJB289A bus network model including two coupling transformers in ADS(advanced design system)software;The validity of the model is verified by theoretical derivation and comparative analysis of laboratory measurement.Based on the two port network distributed parameter model,the characteristic waveforms and parameters of typical electrical fault types are analyzed and sorted out,so as to realize the rapid judgment of typical electrical faults.The results show that:combined with the topology,physical size and distribution parameters of the actual GJB289A bus network,the accurate waveforms of the test port and the characteristic parameters of typical electrical faults can be simulated by using this method,which provides technical support for optimal design of bus detection equipment and the health management of the bus network state.

Keywords

• gjb289a bus
• electrical characteristics
• simulation
• electrical fault
• lossy coupled transmission line model