Research Of Data Acquisition And Processing System Based On Automatic Test Equipment Of AMU

Audio Management Unit (AMU), which is part of the Advanced Cabin Entertainment Service System (ACESS), is used for the management and control of the audio resources in the airplane. Also due to the high requirement for accurateness, complication and assurance of air-borne avionics equipment, the maintenance and failure-diagnoses of aviation electronics system are definitely supported greatly by ATE. This engineering project comes from the requirement of real project, so we develop an ATE for detecting AMU. Cooperating with responding hardware, control software will complete the synthesized functions and performance test of AMU according to the test manual specification. The test runs automatic, and the test results can be got and displayed.Firstly the automatic test system and its application in civil aviation field are summarized, the back ground of the thesis, the objective of the research as well as the technical request are also explained. After lucubrating the working theory of AMU, the main testing items and their characteristics are specified. Then according to the conception of Virtual Instrument, by using PCI-1711 data acquisition card and universal PC as hardware platform of the system and Visual C++6.0 as software platform of the system, this thesis has developed effective data acquisition procedure, and realized the waveform's realtime and dynamic displaying; According to the testing standards which are described in the CMM of AMU whose number is 2790CB06, combined with some optimizing arithmetics in digital signal processing, such as FFT, method of Lagrange inserting value etc, designed data processing module;Then realized the Sinusoid by using Taylor's Series in CCS based on TDS5502EVM, and A-weighted filter by using least square method.