Research On The Automatic Test System Of Aircraft Inertial Components

To make aircraft fly along the scheduled track or established track accuratly and reliably,the aircraft are equipped with perfect inertial navigation system. Thus the reliability of its work plays a significant role in the safety of entire flight process. Airborne inertial component test is an important part of civil aircraft maintenance. Domestic detection equipment is composed of discrete measuring instruments. Most of the testing process were Recorded by hand operation. Thus detection efficiency is low, while the afr also is quite high. Secondly the American adopted technology monopoly for our aircraft inertial maintenance, and taken inertial technical information for protection, At last the price of Foreign inertial navigation test system is very expensive and yet we still need to pay extra fee for software upgrade. So how to detect airborne inertial navigation components quickly and accurately has a positive effect on improving civil aircraft maintenance quality and efficiency. Regarding of this situation, This paper combins automatic test system theory, Labwindows/CVI software platform, computer technology, virtual instrument technology and simulation technology to build a testing system with hardware devices, so as to test airborne inertial navigation and solve the problem of low efficiency by manual and the high price by imported testboard.The main problems to solve includes inertial testing steps summarization, making ARINC429 transceiver boards, checkouting other functions of interface card, writing the driver in Labwindows/CVI, writing software test procedures and building the whole test system to complete test. This paper introduces basic knowledge of the automatic test system,virtual instruments and airborne inertial navigation components. Then it summarizes the system design idea of both hardware and software and introduces the realization of each functional module of both hardware and software in detail. The hardware module includes ARINC429 board, A/D board, power board, Sync signal board, Digital I/O board, Switch board and the drive of each board. The software module includes the simulation of ISDU,software architecture designing, ARINC429 signal transceiver interface designing, discrete signal transceiver interface designing, sync signal transceiver interface designing, analog signal transceiver interface designing. Last part of this paper verified the usability of this test system though testing simulated data with this test system.