The Design Of Embedded Small Flight Parametric Test System Based On ARM

Parameters such as aircraft flying altitude,Mach number and the speed of raise and drop are essential information of such systems as aircraft control, navigation, fire control, air control, and warning and other systems. With the increasing performance of the aircraft,the old testing system cannot meet the requirements of modern high-speed flight testing. So higher requirement has been set for the testing of flight parameters,In accordance with technical requirements of the client, the paper, after an analysis of flight parameters test technology and its development trend, adopts embedded technology to design a system that a 32-bit ARM microprocessor of data collection, processing, testing showed that as one of the aircraft flying altitude, Mach number and the speed of raise and drop system.Based on the contents of the research project, the paper which is around the analyzes the principles of test principle of the flight parameters and design goals,introduced the main research work such as choice of the overall program,selecting different parts of the system,testing the design of hardware and software. During which the emphasis is put on the design of hardware circuit, software and temperature compensation methods of pressure sensor.It should be noted that the machine for testing atmospheric data parameters which is introduced in this paper is composed of small silicon piezoresistive pressure sensors with high sampling rate,32-bit ARM microprocessor with high-performance,A/D converters high-precision with high-precision, and special interface chip.It has characteristic of small size, light-weight,high-integration. The experimental results show that the system is reasonably designed, and it's real-time processing and reliability meet the design needs of the system.