基于FPGA的叶尖间隙信号高速采集与处理方法
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摘要
针对航空发动机动叶片叶尖间隙的实时在线监测需求,提出了一种基于FPGA的叶尖间隙信号多通道高速采集与处理方法。借助FPGA的并行处理优势,在硬件电路中实现叶尖间隙信号的滤波处理,采用双阈值检测法提取叶尖间隙信号的峰峰值、叶片号等关键信息,经组帧和编码后,通过PCI9054的DMA模式将数据传至上位机进行存储和显示。仿真及实验验证,该方法能够实现叶尖间隙高速信号的在线采集与传输,能将单路叶尖间隙信号采集数据传输速率从8.75降至1.6 MB/s,显著减少了数据量和传输速率,减轻了上位机数据处理负担,提高了系统的后续可拓展性。
In accordance with the problem of large data flow in the measurement system of tip clearance,a high-speed data acquisition and processing method,which based on FPGA,has been designed and tested. This method realizes the simulated filtering and digital filtering of the gap signal in the hardware circuit. The double threshold detection method is used to extract the key information such as the peak-to-peak value and the leaf number of the blade gap signal. After the framing and coding,the PCI card is transmitted to the host computer Read,display and store. Through the simulation and experimental verification,this method can realize the on-line acquisition and transmission of the high-speed signal of the tip clearanceand reduce the average transmission rate of single-blade tip gap signal data from 8. 75 to 1. 6 MB/s,which significantly reduces the data volume and transmission rate,reducing the burden on the host computer,and improves the extension of the system.
In accordance with the problem of large data flow in the measurement system of tip clearance,a high-speed data acquisition and processing method,which based on FPGA,has been designed and tested. This method realizes the simulated filtering and digital filtering of the gap signal in the hardware circuit. The double threshold detection method is used to extract the key information such as the peak-to-peak value and the leaf number of the blade gap signal. After the framing and coding,the PCI card is transmitted to the host computer Read,display and store. Through the simulation and experimental verification,this method can realize the on-line acquisition and transmission of the high-speed signal of the tip clearanceand reduce the average transmission rate of single-blade tip gap signal data from 8. 75 to 1. 6 MB/s,which significantly reduces the data volume and transmission rate,reducing the burden on the host computer,and improves the extension of the system.
引文
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[13]杨影,陈鑫.滑动平均滤波在磁链函数转子位置检测法中的应用与设计[J].中国科技论文,2013,8(8):829-832.YANG Y,CHEN X.Application and design of moving average filters in rotor position detection base on flux function[J].China Science Paper,2013,8(8):829-832.
[14]陈世海,裴东兴,张琦.FPGA实现滑动平均滤波算法和LZW压缩算法[J].电子设计工程,2010,18(2):67-69.CHEN SH H,PEI D X,ZHANG Q.Implementation of moving-average filter algorithm and LZW algorithm based on FPGA[J].International Electronic Elements,2010,18(2):67-69.
[15]刘艺柱,杨瑞兰.采用滑动平均滤波法提高硬币识别准确率的研究[J].制造业自动化,2010,32(1):42-44.LIU Y ZH,YANG R L.Moving average filtering method used to improve the accuracy of coins to identify research[J].Manufacturing Automation,2010,32(1):42-44.
[2]叶德超,段发阶,欧阳涛,等.基于多光束叶尖定时原理的叶尖间隙测量技术[J].光电子·激光,2011,22(4):570-573.YE D CH,DUAN F J,OUYANG T,et al.Blade tip clearance measurement using tip timing of multi-beam[J].Journal of Optoelectronics·Laser,2011,22(4):570-573.
[3]任瑞冬,陈钊.基于Lab VIEW的发动机叶尖间隙采集软件设计[J].电子测量技术,2014,37(6):77-81.REN R D,CHEN ZH.Design of dynamic aero-engine tip clearance data acquisition system based on Lab VIEW[J].Electronic Measurement Technology,2014,37(6):77-81.
[4]马玉真.旋转叶片叶尖间隙测量的关键技术研究[D].天津:天津大学,2006.MA Y ZH.The key technique research of blade tip clearance measurement for rotational blades[D].Tianjin:Tianjin University,2006.
[5]单天昌,陆达.基于FPGA的PCI接口DMA传输的设计与实现[J].计算机技术与发展,2010,20(4):215-219.SHAN T CH,LU D.Design and realization of DMA transfers in pci interface based on FPGA[J].Computer Technology and Development,2010,20(4):215-219.
[6]LAWSON C P,IVEY P C.Tubomachinery blade vibration amplitude measurement through tip timing with capacitance tip clearance probes[J].Sensors&Actuators A Physical,2005,118(1):14-24.
[7]张龙,韩鹏卓,王亮,等.基于电容法的叶尖间隙测量准确度主要影响因素研究[J].测控技术,2016,35(5):137-140.ZHANG L,HAN P ZH,WANG L,et al.Research on main influencing factors for tip clearance measurement accuracy based on capacitance method[J].Measurement&Control Technology,2016,35(5):137-140.
[8]WOIKE M,ROEDER J,HUGHES C,et al.Testing of a microwave blade tip clearance sensor at the NASA glenn research center[C].Aiaa Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition,2013.
[9]张娜,黄春峰.航空发动机叶尖间隙测量技术[J].航空制造技术,2010(13):41-45.ZHANG N,HUANG CH F.Measuring technology of blade tip clearance of aeroengine[J].Aeronautical Manufacturing Technology,2010(13):41-45.
[10]张丛丛,谭博.用于ADC测试的数据采集系统的设计[J].电子测量技术,2016,39(10):162-165.ZHANG C C,TAN B.Data acquisition system for ADC testing[J].Electronic Measurement Technology,2016,39(10):162-165.
[11]卫娜,李向东.基于FPGA和AD9240的非制冷焦平面阵列数据采集电路实现[J].中国医学装备,2010,7(4):1-3.WEI N,LI X D.Design of uncooled focal plane array signal sampling using FPGA and AD9240[J].China Medical Equipment,2010,7(4):1-3.
[12]袁建富,颜晗,华波,等.基于FPGA的高速串行码流接收器[J].纳米技术与精密工程,2016,14(3):196-200.YUAN J F,YAN H,HUA B,et al.Research of high speed serial stream receiver based on FPGA[J].Nanotechnology and Precision Engineering,2016,14(3):196-200.
[13]杨影,陈鑫.滑动平均滤波在磁链函数转子位置检测法中的应用与设计[J].中国科技论文,2013,8(8):829-832.YANG Y,CHEN X.Application and design of moving average filters in rotor position detection base on flux function[J].China Science Paper,2013,8(8):829-832.
[14]陈世海,裴东兴,张琦.FPGA实现滑动平均滤波算法和LZW压缩算法[J].电子设计工程,2010,18(2):67-69.CHEN SH H,PEI D X,ZHANG Q.Implementation of moving-average filter algorithm and LZW algorithm based on FPGA[J].International Electronic Elements,2010,18(2):67-69.
[15]刘艺柱,杨瑞兰.采用滑动平均滤波法提高硬币识别准确率的研究[J].制造业自动化,2010,32(1):42-44.LIU Y ZH,YANG R L.Moving average filtering method used to improve the accuracy of coins to identify research[J].Manufacturing Automation,2010,32(1):42-44.
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