Applied Research On The Aircraft Power Supply Parameters Testing System Based On Pci Data Acquisition Card

As a result of rapid development of computer technology, virtual instrument based computer has been widespread accepted in engineering, science, state defense, medical equipment. Especially, development of PCI bus and emerge of graphics interface operation system have greatly increased performance and convenience of virtual instrument. Measure system for Aircraft electrical power supply (MSAEPS) is a kind of important virtual instrument, which can acquire, observe and analyze signal of aircraft electrical power supply system (AEPSS), then do some special treatment to acquired data by computer software.In this paper, I deeply researched measuring methods of parameter guideline to AEPSS, combined with some optimizing arithmetic in digital signal processing, such as FFT, method of Lagrange inserting value, and designed practicable measuring system. During process of designing, all method is based on American military standard MIL-STD-704C, which validated practicability and advantage of this MSAEPS.In the part of interface of software and hardware, which is actually driver of PCI data acquire card, I do some research work, such as reading data by double buffers, and some class libraries of driver.Finally, aimed at some new questions occurred in actual measuring, such as unstable twinkle of graphics, system calibrating, I have done more research work and offered amelioration.