五孔探针高精度大气数据采集系统设计  

Research on high-precision atmospheric data acquisition systemof five-hole probe

作　　者：梁巍 黄振峰[1] 贾继阳 厉金鹏 覃泽龙 LIANG Wei;HUANG Zhenfeng;JIA Jiyang;LI Jinpeng;QIN Zelong(School of Mechanical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学机械工程学院,南宁530004

出　　处：《兵器装备工程学报》2023年第10期272-279,共8页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金面上项目(62073185);广西自然科学基金自助项目(2018GXNSFAA281312)。

摘　　要：根据某型无人机对大气数据采集系统的需求,对基于FPGA+DSP的五孔探针高精度大气数据采集系统进行了研究设计;基于FPGA实现多路传感器高速同步采集,经DSP数据解算后,最终将数据发送至上位机进行实时显示与图像化监测;硬件上采用MEMS数字式传感器、通讯隔离芯片以及电源滤波电路来增加信号抗干扰能力,软件上对静压和动压数据分别进行了二阶温度补偿和滤波,并采用线性插值算法进行误差补偿提高精度。经过多组测试验证,最终实现气压高度平均误差0.0585 m,迎角、侧滑角平均误差为0.139°,相较于传统迎角传感器,精度提高了近40%,满足飞控系统对五孔探针大气数据采集系统的要求。According to the requirements of a certain type of unmanned aerial vehicle for the atmospheric data acquisition system,the high-precision atmospheric data acquisition system of five-hole probe based on FPGA+DSP is researched and designed;based on FPGA,the high-speed synchronous acquisition of multi-channel sensors is realized,and the data is calculated by DSP.Finally,the data is sent to the host computer for real-time display and image monitoring;MEMS digital sensors,communication isolation chips and power supply filter circuits are used in hardware to increase signals anti-interference ability.The dynamic pressure data is respectively subjected to second-order temperature compensation and filtering,and the linear interpolation algorithm is used for error compensation to improve the accuracy.After multiple sets of tests and verifications,the average error of air pressure altitude is 0.0585 m,and the average error of angle of attack and sideslip angle is 0.139°.Compared with the traditional angle of attack sensor,the accuracy is improved by nearly 40%,which meets the requirements of flight control system for five-hole detection.

关 键 词：五孔探针 迎角 大气数据采集 微电子传感器 高精度 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]