基于最小航道法的实测数字信号奇异值剔除算法
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摘要
由于使用环境和本身功能的影响,运载机械在进行实测数字信号采集时,常常会出现干扰信号值,即数字信号奇异值。准确地剔除数字信号奇异值是实测数字信号处理中的一项关键工作。提出了基于最小航道法的数字信号奇异值剔除算法,根据数据的变化趋势进行数字信号奇异值的甄别与检测。与幅值门限检测法和梯度门限检测法进行了对比分析,结果表明基于最小航道法的奇异值剔除算法优于幅值门限检测法和梯度门限检测法,处理结果真实可靠。
Due to the influence of the electromagnetic field and environment,there are spikes in the measured digital signal of carrier machinery.Eliminating the spike accurately is a key work of the digital signal processing.The algorithm based on the racetrack method of eliminating spike was put forward.This algorithm detects the spike according to the changing trends of the data,distinguishes spike and normal data obviously.Compared with the treatment results with amplitude threshold detection and differential threshold detection,the results show that the algorithm based on the racetrack method of eliminating spike is better than the others.
Due to the influence of the electromagnetic field and environment,there are spikes in the measured digital signal of carrier machinery.Eliminating the spike accurately is a key work of the digital signal processing.The algorithm based on the racetrack method of eliminating spike was put forward.This algorithm detects the spike according to the changing trends of the data,distinguishes spike and normal data obviously.Compared with the treatment results with amplitude threshold detection and differential threshold detection,the results show that the algorithm based on the racetrack method of eliminating spike is better than the others.
引文
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14王海军,靳平,刘贵忠,等.地震记录中毛刺干扰的自动检测[J].地震学报,2003,25(3):331～338.Wang Haijun,Jin Ping,Liu Guizhong,et al.Automatic spikes detection in seismogram[J].Acta Seismologica Sinica,2003,25(3):331～338.(in Chinese)
15 Fuchs H O,Nelson D V,Burke M A,et al.Fatigue under complex loading:analyses and experiments[M].Warrendale,PA:Society of Automotive Engineers,1977:145～162.
2阎楚良,高镇同.飞机高置信度中值随机疲劳载荷谱的编制原理[J].航空学报,2000,21(2):118～123.Yan Chuliang,Gao Zhentong.Compilation theory of median stochastic fatigue load-spectrum with high confidence level forairplane[J].Acta Aeronautica at Astronautica Sinica,2000,21(2):118～123.(in Chinese)
3阎楚良,张书明,叶舸,等.中值随机载荷谱数据处理专家系统[J].北京航空航天大学学报,2000,26(4):428～431.Yan Chuliang,Zhang Shuming,Ye Ge,et al.Data treatment expert system for median stochastic load-spectrum[J].Journalof Beijing University of Aeronautics and Astronautics,2000,26(4):428～431.(in Chinese)
4刘克格,闫楚良.飞机起落架载荷谱实测与编制方法[J].航空学报,2011,32(5):841～848.Liu Kege,Yan Chuliang.Load measurement and compilation of landing gear of airplane[J].Acta Aeronautica atAstronautica Sinica,2011,32(5):841～848.(in Chinese)
5阎楚良,张书明,卓宁生,等.飞机机翼结构载荷测量试验力学模型与数据处理[J].航空学报,2000,21(1):56～59.Yan Chuliang,Zhang Shuming,Zhuo Ningsheng,et al.Mechanical model and data processing of load measurement test forthe airplane’s wing structure[J].Acta Aeronautica at Astronautica Sinica,2000,21(1):56～59.(in Chinese)
6 Yan Chuliang,Liu Kege.Theory of active reliability-based design for predetermined life of structures[J].Advanced MaterialsResearch,2008,44～46:745～750.
7 Brychta R J,TUNtrakool S,Appalsamy M,et al.Wavelet methods for spike detection in mouse renal sympathetic nerveactivity[J].IEEE Transactions on Biomedical Engineering,2007,54(1):82～93.
8王国军,胡人喜,陈欣.nsoft疲劳分析理论与应用实例指导教程[M].北京:机械工业出版社,2007.
9李映颖,谭光宇,曲建岭,等.飞行记录参数奇异点的处理[J].电机与控制学报,2009,13(增刊1):135～138.Li Yingying,Tan Guangyu,Qu Jianling,et al.Prehandling research of flight parameter strange points based on Matlab digitalfiltering technique[J].Electric Machines and Control,2009,13(Supp.1):135～138.(in Chinese)
10张漫,汪懋华.联合收获机测产系统数据采集与处理的误差分析[J].农业机械学报,2004,35(2):172～174,171.Zhang Man,Wang Maohua.Brief report on research works of eight papers[J].Transactions of the Chinese Society forAgricultural Machinery,2004,35(2):172～174,171.(in Chinese)
11张书慧,马成林,吴才聪,等.变量施肥机空间数据采集与处理方法[J].农业机械学报,2004,35(4):93～96.Zhang Shuhui,Ma Chenglin,Wu Caicong,et al.Spatial data collection and processing for variable ratio fertilizing[J].Transactions of the Chinese Society for Agricultural Machinery,2004,35(4):93～96.(in Chinese)
12胡宇轩,阎楚良.数据挖掘技术在农业机械质量控制中的应用[J].农业机械学报,2007,38(5):153～156.Hu Yuxuan,Yan Chuliang.Design and implementation on data mining technology in quality control of agricultural machinery[J].Transactions of the Chinese Society for Agricultural Machinery,2007,38(5):153～156.(in Chinese)
13马京汉,周增产,于德年,等.屠宰废水COD测试方法及数据处理[J].农业机械学报,1999,30(5):72～75.Ma Jinghan,Zhou Zengchan,Yu Denian,et al.Testing method and computer numerical analysis for cod of slaughteringwaste water[J].Transactions of the Chinese Society for Agricultural Machinery,1999,30(5):72～75.(in Chinese)
14王海军,靳平,刘贵忠,等.地震记录中毛刺干扰的自动检测[J].地震学报,2003,25(3):331～338.Wang Haijun,Jin Ping,Liu Guizhong,et al.Automatic spikes detection in seismogram[J].Acta Seismologica Sinica,2003,25(3):331～338.(in Chinese)
15 Fuchs H O,Nelson D V,Burke M A,et al.Fatigue under complex loading:analyses and experiments[M].Warrendale,PA:Society of Automotive Engineers,1977:145～162.
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