Design And Implementation Of Atmospheric Parameter Measurement Device Based On FPGA And DSP

The atmospheric parameters can be used by the control and management system of the aircraft,which can provide flight guidance for the aircraft.Therefore,it is very important to obtain the atmospheric data instantly and accurately,during aircraft flying.This paper designs and implements a measurement device of atmospheric data based on FPGA and DSP.The measurement device includes five pressure sensors and two temperature sensors,which can obtain the pressure and temperature signals of the aircraft's surface in real time.The signal output by the sensor will be converted into five pressure values and two temperature values after acquisition,conditioning,conversion and calculation.The obtained pressure values and temperature values can be used to solve the atmospheric parameters such as Mach number,static pressure,angle of attack,sideslip angle and total temperature.Through these parameters,the aircraft control system can master the flight state of the aircraft instantly,so as to control the aircraft.Firstly,this paper introduces the function of the parameter measurement device in the atmospheric measurement system,and then analyzes the functional requirements of the device.Therefore,the paper determines the implementation scheme of the hardware of this device,and analyzes and selects the basic components that constitute the measurement device.Secondly,the key technologies of each component module of the atmospheric parameter measurement device are researched and designed,including the design of temperature signal conditioning circuit and analog-to-digital conversion control logic,the design of pressure signal collection control logic and solution logic,the design of communication interface and control logic between FPGA and DSP,the interface design and control logic design between FPGA and1553 controller,the interface circuit design between FLASH and EMIF,and the underlying driver design.Finally,the functions of the measuring device are verified and analyzed.It is proved that the solution program can start automatically and the underlying driver can run normally after the DSP is powered on.The communication between DSP and FPGA can be realized.A/D conversion function can be realized;The data calculation function can be realized;The calculated data can be transmitted back to the control system through 1553 B bus.The test proves that the atmospheric data measuring device is designed correctly and can achieve the required functions,and the acquisition accuracy of physical quantity signals can meet the requirements of the indicators.