Fault Analysis And Test System Design For Continuity Resistance Test Of Electrical Components In Aircraft Engine

Aero-engine electrical components are used to provide the required power for the aircraft and responsible for the signals collection and control of aero-engine. The poor working environment and complex types may cause the aero-engine electrical components in failure, affecting the reliability of the engine and even the whole aircraft. Continuity resistance is an important parameter for the operating state of electrical components. Therefore, the research on continuity fault mechanism, testing method and testing technology of aero-engine electrical components is important to ensure the security and reliability of aero-engine and aircraft.In this paper, the analysis of cause for the electrical continuity faults of aero-engine electrical components was taken. The electrical continuity faults of aero-engine electrical components were classified based on their forming principle. Then mathematical models were established to analyze the electrical continuity faults. With the help of Simulink simulation tools, study for the possible effect caused by electrical continuity faults was taken. An automatic test system was designed, whose hardware system is based on virtual instrument technology and the PXI/LXI bus technology etc. A circuit connection method for 2-pole matrix module is also designed. Software system is based on Labview platform to achieve communication of hardware modules, complex measurement operation, establishment of the continuity measurement circuit, human-computer interaction and account management.The electrical continuity fault mechanism analysis has further verified the necessity of continuity resistance test for aero-engine electrical components. The automatic test system for the continuity resistance test of aero-engine electrical components achieved high efficiency in continuity resistance test.