軸承matlab處理程序

1．?dāng)?shù)據(jù)導(dǎo)入matlab1.1啟動Matlab軟件1.2點(diǎn)擊酋載入故障數(shù)據(jù)中的G2015,Workspace窗口出現(xiàn):N：=uTieValueClass田G2CI15<100000x1double>double1.3取第一組數(shù)據(jù)G201,命令窗口輸入：G201=G2015(1:1:20000);2.數(shù)據(jù)預(yù)處理在測試中由數(shù)據(jù)采集所得的原始信號,在分析前需要進(jìn)行預(yù)處理,以提高數(shù)據(jù)的可靠性和真實(shí)性,并檢查信號的隨機(jī)性,以便正確地選擇分析處理方法。預(yù)處理工作主要包括三個方面：一是除去信號中的外界干擾信號和剔除異常數(shù)據(jù),如趨勢項和異點(diǎn)；二是對原始數(shù)據(jù)進(jìn)行適當(dāng)?shù)钠交驍M合；三是對原始信號的特性進(jìn)行檢驗。當(dāng)然這些處理工作不是全部必需的,可以選—項或兩項內(nèi)容,當(dāng)認(rèn)為原始信號獲取工作十分可靠或原始數(shù)據(jù)簡單可以直接判斷的情況下，也可以不進(jìn)行這些預(yù)處理工作。以下所做數(shù)據(jù)預(yù)處理，故障軸承以G201為例,正常軸承以Z201為例,觀察原始數(shù)據(jù)經(jīng)過不同方法做處理前后的變化。零均值化處理(原理公式見報告P8)命令窗口輸入：G201l=G201-sum(G201)/20000;%G201l為零均值處理后的數(shù)據(jù)。“20000”為采樣點(diǎn)數(shù)。sum為求和語句subplot(2,1,1),plot(G201);subplot(2,1,2),plot(G201l);%顯示G201與G2011得到下面圖形：從時域圖形上看，是波形整體在Y軸的平移。再看看頻域變化，命令窗口輸入：N=20000;%采樣點(diǎn)數(shù)fs=10000;%采樣頻率

f=(0:N-1)'*fs/N;%進(jìn)行對應(yīng)的頻率轉(zhuǎn)換G201p=abs(fft(G201));%進(jìn)行fft變換，G201p為G201進(jìn)行fft變換后結(jié)果G201lp=abs(fft(G201l));%進(jìn)行fft變換，G201lp為G201l進(jìn)行fft變換后結(jié)果subplot(2,1,1),plot(f(1:N/2),G201p(1:N/2));subplot(2,1,2),plot(f(1:N/2),G201lp(1:N/2));%顯示G201與G201p的頻譜圖從頻域圖可以明顯看出，零均值后消除①€0處出現(xiàn)一個由直流分量產(chǎn)生的大譜峰(將近達(dá)到4.5,104)，處理后避免了其對周圍小峰值產(chǎn)生的負(fù)面影響，便于頻域分析。消除趨勢項(原理公式見報告P10)使用最小二乘法，命令窗口輸入：t=(0:1/fs:(N-1)/fs)';%離散時間列向量G201x=polyfit(t,G201,6); %計算多項式待定系數(shù)向量G201x=G201-polyval(G201x,t);%用G201減去多項式系數(shù)生成的趨勢項,G201x即為消除趨勢項后的數(shù)據(jù)subplot(2,1,1),plot(G201);subplot(2,1,2),plot(G201x);%顯示G201與G201x得到以下圖形：與前面零均值化處理中做頻域圖的方法一樣，做出G201與G201x的頻譜圖G201p與G201xp，得到圖形如下：從時域圖形和頻域圖形上看，消除趨勢項與零均值化處理的功能相似。不過，需要注意的是，它更重要的消除趨勢項，因為本數(shù)據(jù)中的多項式趨勢項很小，所以沒有明顯的變化。1.3平滑處理(原理公式見報告P11)使用五點(diǎn)三次平滑，命令窗口輸入：a=G201';fork=1:2b(1)=(69*a(1)+4*(a(2)+a(4))-6*a(3)-a(5))/70;b(2)=(2*(a(1)+a(5))+27*a(2)+12*a(3)-8*a(4))/35;forj=3:N-2b(j)=(-3*(a(j-2)+a(j+2))+12*(a(j-1)+a(j+1))+17*a(j))/35;end

b(N-1)=(2*(a(N)+a(N-4))+27*a(N-1)+12*a(N-2)-8*a(N-3))/35;b(N)=(69*a(N)+4*(a(N-1)+a(N-3))-6*a(N-2)-a(N-4))/70;a=b;endG201ph=a';%G201ph為五點(diǎn)三次平滑法處理的數(shù)據(jù)subplot(2,1,1),plot(G201);subplot(2,1,2),plot(G201ph);%顯示G201與G201ph得到以下圖形：顯變少變小，而低頻部分基本無變化。因為故障的頻率主要集中在低中頻部分，這樣處理后不僅對故障的分析無影響，而且去除部分噪音，減少干擾。1.4濾波處理(原理公式見報告P13)%使用巴特沃斯濾波器進(jìn)行濾波，命令窗口輸入：wp=2400;%通帶截至頻率2400hzws=2800;%阻帶截至頻率2800hzrp=2;%通帶波動系數(shù)rs=60;%阻帶波動系數(shù)[N,wn]=buttord(wp/(fs/2),ws/(fs/2),rp,rs,'z');%建立巴特沃斯濾波器[num,den]=butter(N,wn);%建立數(shù)字濾波器[H,W]=freqz(num,den);%分析濾波器的幅頻特性plot(W*fs/(2*pi),abs(H));grid;%巴特沃斯濾波器頻率響應(yīng)圖得到巴特沃斯濾波器頻率響應(yīng)圖：繼續(xù)輸入：G201lb=filtfilt(num,den,G201);%G201lb為G201濾波后的數(shù)據(jù)subplot(2,1,1),plot(G201);subplot(2,1,2),plot(G201lb);%顯示G201與G201lb得到以下圖形：與前面零均值化處理中做頻域圖的方法一樣，做出G201與G201lb的頻譜圖G201p與G201lbp,得到圖形如下：在時域內(nèi)不能明顯的看出處理前后的區(qū)別。但從頻域圖可以看出，2500Hz后的頻率幾乎不存在。因為低通濾波器的通帶截至頻率為2400hz，阻帶截至頻率為2800hz?？梢姙V波效果是很好的。以上介紹了一些數(shù)據(jù)預(yù)處理的方法，鑒于本文采集的原始信號數(shù)據(jù)較好，故只做零均值化這一項處理。3．時域特征值提?。ㄔ砉揭奝15）命令窗口輸入：

G201m=sum(G201l)/20000; %G201m為均值，G201I為零均值化處理后結(jié)果，下同G201f=sum((G201l-G201m)42); %G201f為方差G201rms=sqrt(sum(G201I.A2)/20000); %G201rms均方根值G201peak=(max(G201I)-min(G201I))/2; %G201peak為峰值G201c=G201peak/G201rms; %G201c 為峰值因子G201k=sum(G201I.A4)/((G201rms.A4)*20000); %G201k為峭度系數(shù)G201s=(G201rms*20000)/sum(abs(G201I)); %G201s為波形因子G201cI=G201peak/(sum(sqrt(abs(G201I)))/20000)42; %G201cI裕度因子G201i=(G201peak*20000)/sum(abs(G201I)); %G201i脈沖因子由此得到G201的時域特征值根據(jù)前述方法一次得到G202~G2010，Z201~Z2010的時域特征值，建立表格狀態(tài)樣本時域特征值均值(10€)方差均方根值峰值峭度系數(shù)峰值因子C裕度因子CL脈沖因子1波形因子SG2016.85222340.800.34212.270113.3236.635718.22512.4641.8785499G20222.34522605.740.36102.354914.2176.524218.82112.6271.9355027G203-32.38542902.360.38092.488613.5326.532618.93212.6361.9343030G20415.32902630.680.36272.480313.8756.838819.02812.9641.8957684故G20515.89442510.690.35432.337913.2636.598518.574012.5271.8985障21軸G206-3.73632647.010.36382.393613.5386.579318.24012.4291.8892承285G207-2.06752379.660.34492.287112.3886.630517.56212.1191.8278230G208-4.51022548.620.35702.451214.0456.866619.81913.2831.9346759G2098.08802496.800.35332.337112.6306.614617.375712.0821.826643G20104.40802871.860.37892.316711.7416.113816.91311.3861.8625

746Z2015.24191940.06746Z2015.24191940.060.31151.58504.32035.08898.18286.73971.3244Z20227.71791805.180.30041.50304.46845.00278.06126.63511.3263Z203-23.98241698.730.29141.37644.62554.72287.70336.31551.3372Z2042.58211677.680.28961.73994.88596.00739.68087.97701.3279Z2053.42741890.520.30751.52314.50354.95397.94036.55221.3226Z20628.42331688.290.29051.32473.92824.55947.21485.96471.3082Z20716.67021629.540.28541.46184.58805.12138.23386.79211.3262Z208-17.69651605.220.28331.34904.43664.76187.67706.32011.3272Z20920.48481714.370.29281.45734.66104.97748.09836.64661.3354Z2010-4.03201790.060.29921.68775.19085.64129.37957.64671.3555正常軸承列出時域參數(shù)的數(shù)字表后可以簡單分析，故障軸承和正常軸承在方差，峰值，峭度系數(shù)，裕度因子，脈沖因子，波形因子差別較為明顯，而在均值，均方根值，峰值因子差別不明顯4．頻域特征值提取（原理公式見P18）4.1頻域參數(shù)命令窗口輸入：fori=2:20000G201g(i)=(G201l(i)-G201l(i-1))/(1/10000);endfori=2:20000G201gg(i)=G201g(i)*G201l(i);endG201msf=(sum((G201g).A2))/(4*(pS2)*sum(G201I.A2)); %G201msf為均方頻率G201fc=(sum(G201gg))/(2*pi*sum(G201l42)); %G201fc重心頻率G201vf=G201msf-G201fc.A2; %G201vf為頻率方差由此得到G201l的頻域參數(shù)。根據(jù)前述方法一次得到G202~G2010，Z201~Z2010的時域特征值，建立表格狀態(tài)樣本頻域參數(shù)重心頻率頻率方差均方頻率故G201727.4390768683.09001297850.5751障G202732.7359755254.24021292156.1458軸G203783.7554830793.71491445066.2883承G204772.6559858228.74341455225.8325G205708.5887743009.38451245107.3676G206G207G206G207G208G209G2010807.0247776.6448752.5714839.0520774.6435876652.1313825242.1517842258.3010952037.6514842014.28501527941.02401428419.36961408621.99141656045.85891442086.8989正常軸

承Z201Z202Z203Z204Z205Z206Z207Z208Z209Z20101947.72042063.44762124.78892129.98192049.52722047.97912151.69962181.39902171.50926177234.38166752047.58966969666.44357038297.66166681185.6000665932533207213367.43357046245.89152088.4724 6637350.77779970849.153911009863.557011484394.402811575120.478510881747.310710853543.629311675320.495011971868.876411761698.145210999067.8211從上表可以看出，頻域參數(shù)的特征值重復(fù)性和差異性都是比較良好的。4.2傅里葉變換（原理公式見P20）將G2011和Z2011（Z2011為Z201零均值化后數(shù)據(jù)）的fft變換后的G201lp與Z201lp做出，程序如下：G201lp=abs(fft(G201l,16384));G201lp=G201lp(1:8192,1);Z201lp=abs(fft(Z201l,16384));Z201lp=Z201lp(1:8192,1);subplot(2,1,1),plot(G201lp);subplot(2,1,2),plot(Z201lp);如下圖所示：能夠區(qū)分兩個狀態(tài)且能代表自己頻譜的區(qū)域有：點(diǎn)（326,1）、區(qū)域（2560?3000）、點(diǎn)（3278,1）、區(qū)域（6310~6646）、區(qū)域（6850~7300）用懸標(biāo)記。對正常軸承數(shù)據(jù)隨機(jī)抽取Z203fft、Z204fft、Z206fft、Z208fft數(shù)據(jù)對比圖形如下:Z2'03fft500w0 1 1 X：326 :Y：187.6 ■500w0 1 1 X：326 :Y：187.6 ■01000丄Ji ■30002000X：3278 ;Y:6.227 '….一」.…4000點(diǎn)數(shù)Z2'04fft5000500;X:6461:Y：252.8X:65491Y:242.9:■■:700060008000G201~G2010,Z201~Z2010的傅里葉變換特征值與特征區(qū)域提取出來：G201ffttz=[G201lp(326,1),sum(G201lp(2560:3000,1)),G201lp(3278,1),sum(G201lp(6310:6646,1)),sum(G201lp(6850:7300,1))];%G201ffttz為G2011進(jìn)行fft變換后提取的特征值建立表格：狀態(tài)樣本FFT頻域特征值(326,1)(2560：3000,1)(3278,1)(6310：6646,1)(6850：7300,1)故G20124.037016457.4591223.41115511.60235070.6419障G20236.131815337.1272216.35055283.45645046.5340

G20328.267118178.6398213.62015642.92055046.5340G20411.124618178.6398163.98695662.49845687.7720G205114.039916154.9008168.20395562.42985151.0799G20636.935119195.7369179.82815528.26136344.3349G20711.462918551.4539162.56425491.62415443.5653G208141.138515024.3193148.25905700.04945710.0924G20937.458620519.3069148.70935955.78156390.3742G201092.740220333.6468138.53706092.24495809.4190Z201247.171610356.38888.211015539.769111057.7255Z202179.159810083.433627.494314772.372010632.8833Z203187.585210018.71816.226915396.491310692.6573Z204212.92359502.587717.208415035.716910475.6605Z205132.327710125.071418.669915691.313911033.8520Z206210.835610029.603417.639215133.589610612.5788Z207205.152910220.055918.711914764.755710577.8874Z208227.172010414.902020.944014186.354211097.2232Z209173.456810161.368810.417015232.020110877.8867Z2010198.617310366.74376.862415144.132911205.6632軸承正常軸承4.3功率譜處理（（原理公式見P22）采用Welch平均周期法，采樣頻率為10000Hz,長度為16384點(diǎn)，分段時每段長度為4096,相鄰兩段重疊的點(diǎn)數(shù)為2048，因此分成了7段，窗函數(shù)為缺省。命令窗口輸入以下程序：[p,f]=spectrum(G201l,4096,2048,[],fs);G201gl=p(:,1);%采用Welch平均周期法，G201功率譜處理結(jié)果將G201gl和Z201gl顯示出來，得到：能夠區(qū)分兩個狀態(tài)且能代表自己頻譜的區(qū)域有：點(diǎn)（82,1）、區(qū)域（660?739）、點(diǎn)（820,1）、點(diǎn)（1473,1）、點(diǎn)（1616,1）、點(diǎn)（1639，1）點(diǎn)（1778，1）。對故障軸承數(shù)據(jù)隨機(jī)抽取G202gl、G204gl、G206gl、G208gl數(shù)據(jù)對比圖形如下:X:1473Y:0.1865X:1473Y:0.1865X:1616Y:0.02457X:1639Y：0.04409X:1778Y:001281140016001800X:1473X:1616X:1639X:1778Y：0.07676Y:0.01558Y：0.06597Y：00080171400160018000圖3-14故障軸承重復(fù)性功率譜從故障軸承抽樣數(shù)據(jù)對比圖形可以看出，各個特征值的性重復(fù)較好。對正常軸承數(shù)據(jù)隨機(jī)抽取Z203gl、Z204gl、Z209gl、Z2010gl數(shù)據(jù)對比圖形如下[_X:82X：820Y:0.&0682Y：0.4774..■口 "V......X：82..Y：U.bCbB.. 具“L記.一一一L. L」iX:82Y:0.4164IIX:16161639-1.476X:1778Y:0.193Y:1J21I■i……i i T X:1616 X:1639 1....i Y: 1.286...Y：1.43_____儀1778 .Y:0.3926: :Y:0.0164i i>■■ Y:0.1873I ..ijlJi . ■i樣本W(wǎng)elch平均周期法功率譜特征值（82，1）（820，1）（1473,1）（1616,1）（1639，1）（1778，1）（660：739，1）G2010.36430.56650.21450.01790.04310.00878.8665G2020.23510.50680.18650.02460.04410.012810.8937G2030.26840.52910.12290.01150.03530.011012.0233G2040.27000.34990.07680.01560.06600.008010.2235G2050.42580.36920.13480.01790.04520.00919.7017G2060.22950.41230.11890.01260.08690.014714.1895G2070.15160.32130.02270.01630.04390.006511.9705G2080.29760.28780.04740.01300.05170.00747.6765G2090.21950.32900.10010.02170.03190.009415.106G20100.36300.28870.15710.02510.04680.011413.565Z2010.65380.00910.02171.22961.31050.24273.8739Z2020.36680.01870.01171.43032.31200.31313.5024Z2030.47740.00680.00971.27641.44310.26823.4486Z2040.56580.00970.01601.44681.97070.20482.9251Z2050.46120.01110.00950.42011.42860.22223.3279狀態(tài)故障軸承正常

軸Z206軸Z2060.59870.00920.02771.23900.94610.2747承Z2070.43350.01320.01340.89882.08890.1968Z2080.55980.01360.01630.54911.89510.1672Z2090.41640.00950.02321.02071.47640.1930Z20100.39260.01640.01631.28561.42980.18733.29203.39163.57903.53333.8456從上表可以看出，故障軸承和正常軸承功率譜的特征值重復(fù)性和差異性都是比較良好的。5．時頻分析法——小波包絡(luò)(原理公式見P24)在這里選擇(30)頻段的信號為例進(jìn)行重構(gòu)，再包絡(luò)解調(diào)，程序如下：wpt=wpdec(G201l,3,'db4');%小波包進(jìn)行3層分解，分解用的小波基為db4cz=wprcoef(wpt,[30]);%對(30)節(jié)點(diǎn)即(0~875Hz)進(jìn)行重構(gòu)G201xb=abs(hilbert(cz));%G201xb為G201l的包絡(luò)分析G201xbp=abs(fft(G201xb,4096));%G201xbp為G201xb進(jìn)行FFT變換后數(shù)據(jù)故障軸承G202與正常軸承Z202的(30)節(jié)點(diǎn)的包絡(luò)譜：

圖3-16節(jié)點(diǎn)（30）G202與Z202小波包包絡(luò)譜對比發(fā)現(xiàn)兩者并沒有明顯的區(qū)別，很難從此節(jié)點(diǎn)提取出特征值，說明故障頻率不在0?875Hz頻率段。再對（31）節(jié)點(diǎn)的樣本1數(shù)據(jù)進(jìn)行分析：圖3-17節(jié)點(diǎn)（31）G202與Z202小波包包絡(luò)譜從圖中可以得出在點(diǎn)（2，1）、點(diǎn)（513,1）和點(diǎn)（1025，1）處的值個狀態(tài)的差異性比較好，因此初步確定這三點(diǎn)為其特征值。接下來對（32）、（33）幾個節(jié)點(diǎn)進(jìn)行了包絡(luò)譜分析：在眾多的包絡(luò)譜分析中發(fā)現(xiàn)其規(guī)律是：他們都是在包絡(luò)譜的(2,1)、(513,1)、(1025,1)點(diǎn)出現(xiàn)峰值并且各個狀態(tài)有區(qū)別，即差別性較好，并且通過重復(fù)性檢驗，其可以作為特征值。因此將這三點(diǎn)作為特征值，并取(31)、(32)、(33)三個節(jié)點(diǎn)作為此種方法分析的特征值提取節(jié)點(diǎn)。特征值提取的程序如下：wpt=wpdec(G201l,3,'db4');fork=1:3cz=wprcoef(wpt,[3k]);hom=abs(hilbert(cz));czf=abs(fft(hom,4096));

G201xbp(1,3*(k)-2)=czf(2,1);G201xbp(1,3*(k)-1)=czf(513,1);G201xbp(1,3*(k))=czf(1025,1);end得到的G201xbp為4096*9的矩陣，第一行就是所求的各節(jié)點(diǎn)3個點(diǎn)的特征值。12345 |T89114U.EI2375.985510.479257.291519.4564U.915652.2U1524.80815.8094依此建立如下表格：態(tài)樣本（）（）（33）（2，1）(513,1)(1025,1)（2，1）(513,1)(1025,1)（2，1）(513,1)(1025,1)G201140.82375.985510.479257.291519.45640.915652.201524.80815.8094G202146.321~76.16529.797766.867420.45920.796290.958228.26856.2661G203/168.2919.481512.902764.289221.36120.6669103.759931.21457.336故5G204187.25917.203512.036855.834720.15920.754997.767229.56787.1333障G205120.15/74.97749.117938.364721.64820.663064.718724.17255.8821軸G206126.1719.998613.977838.176219.99110.629763.416833.85788.0195承7G207172.10008.891213.615048.372116.89800.834875.363429.52816.8948G208129.830□6.317313.272052.231019.16160.765483.543128.15307.9258G2093116.45794.113611.304852.985220.01131.237453.141328.90417.5804G2010135.15729.374115.721574.642928.54920.9465107.163344.01199.8800Z20146.381212.393721.06194.710110.46040.295412.422318.86958.1549Z20223.954111.761418.22852.190710.23340.379916.762117.05978.3838Z20313.48868.445916.57215.43278.06850.345113.014517.45928.2029正Z20493.863514.109119.01434.954610.50310.452517.713519.01018.4352常Z20539.649412.643519.611511.75429.97510.350420.583019.69528.4686軸Z20638.831911.601818.92456.05379.57180.346915.048718.10158.2054承Z20727.221112.947618.80511.98989.88270.462919.416816.95098.4433小波包包絡(luò)譜特征值狀

Z20813.718510.653916.8279Z20813.718510.653916.82794.0868Z20963.891213.132218.80909.1131Z201019.222713.034419.74573.82879.21350.36089.594918.36949.22449.85580.39784.604518.66667.927110.06120.353624.758616.12317.91866．特征值歸一化(原理公式見報告P29)程序如下：fori=1:33forj=1:20gy(i,j)=(tz(i,j)-min(tz(i,:)))/(max(tz(i,:))-min(tz(i,:)));%tz為原特征值矩陣,gy為歸一化后的特征值矩陣。33為原始特征值個數(shù)，20為數(shù)據(jù)樣本個數(shù)。endend得到下列表格：故障軸承G201~G2010時域特征值0.64530.900000.78470.79400.47110.49860.45840.66560.60510.56710.771310.79060.69810.80310.59700.72730.68730.97650.60250.796110.81350.72750.82480.63110.75510.71720.97950.81230.885110.99290.87050.91840.82690.96790.86980.85230.913110.93340.96680.90730.93400.82230.98340.84580.75940.89990.85160.85520.98800.88380.87550.897710.89080.67370.87360.92080.92960.93730.90120.87480.820910.80610.76940.88810.91030.91150.95630.89660.88330.840810.83580.74080.909110.99810.93660.94100.92620.82830.99860.82640.8836頻域參數(shù)0.01280.01640.05100.043500.06680.04620.02990.08860.04480.00400.00190.01360.017800.02070.01270.01530.03230.01530.00490.00440.01860.019600.02640.01710.01520.03830.0184FFT譜特征值0.05470.10590.072600.43600.10930.00140.55080.11160.34580.63130.52960.78750.78750.60380.87980.82140.501210.983110.96750.95490.72640.74580.79930.71980.65400.65600.60920.021900.03450.03640.02680.02350.02000.04000.06460.07770.0039000.10410.01700.21070.06450.10770.21820.1239功率譜特征值0.42350.16630.23260.23580.54600.155100.29070.13520.420910.89330.93320.61300.64750.72450.56190.50210.57570.503710.86340.55320.32830.61120.53370.06440.18490.44200.720.00450.009100.00290.00450.00080.00330.00100.00710.0090.00490.00540.00150.01500.00580.02410.00530.008700.00650.00720.02050.01470.00490.00850.026700.00290.00950.01600.48780.65420.74690.59920.55630.92480.74260.390110.87350.73280.76440.890810.61390.64850.91280.66950.59260.7002

小波包絡(luò)譜特征值0.18730.20530.53700.30910.08640.58880.47800.220500.52620.11400.05690.31690.244400.40690.37650.34780.18310.55290.76120.89300.85750.74110.50070.49810.63840.69150.701910.55600.60500.64900.59030.66300.58210.43110.54160.583110.65840.53160.39440.48780.39020.35490.57270.499010.69120.46410.84200.96680.90840.58610.57340.68990.76970.473310.31140.43550.54110.48210.28860.63590.48070.43140.4583100.11220.37500.32520.01790.54290.26660.51990.43511正常軸承Z201~Z2010時域特征值0.61880.98840.13820.57500.588910.80670.24160.86950.46630.25810.15420.07210.05590.21990.06400.018700.08410.14250.28890.17520.08300.06450.24800.07380.021500.09730.16290.22360.15320.04440.35670.170500.11780.02090.11390.31190.03810.05250.06780.09310.055900.0640.04940.07120.12270.22950.19210.07080.62760.171000.24350.08770.18120.46890.07680.06710.03880.19560.057600.08080.03670.07010.17170.10590.09160.04790.27490.080300.11300.04860.09320.22980.02580.02890.04620.03140.023000.02870.03030.04340.0754頻域參數(shù)0.84130.91990.96160.96510.91050.90940.979810.99330.93690.83990.92870.96230.97290.91780.91440.974110.97420.91100.81350.91030.95460.96300.89840.89570.972410.98040.9093FFT譜特征值10.71190.74760.85490.51350.84610.82200.91530.68770.79430.07750.05270.046800.05650.04780.06510.08280.05980.07840.00910.097900.05060.05730.05250.05750.06780.01930.00290.98540.91170.97170.937010.94640.91100.85540.95570.94740.97600.90700.91670.88150.97210.90370.89810.98240.94681功率譜特征值10.42850.64870.82480.61650.89030.56130.81280.52730.47990.00410.021300.00520.00770.00430.01140.01210.00480.01720.05950.01070.00100.031700.08880.01900.03320.06680.03320.84870.9890.881310.28470.85520.61820.37460.70310.88770.560810.61890.85030.61260.40090.90220.81720.63350.61310.770410.85360.64680.70350.87480.62070.52410.60830.58970.07790.0470.043000.03310.03010.03830.05370.04990.0756小波包絡(luò)譜特征0.18930.060200.46250.15050.14580.07900.00130.29010.03300.82840.76510.433410.85340.74910.88380.65430.90230.892510.76280.62410.82860.87860.82100.81110.64550.81140.88980.03740.00280.04740.04080.13440.055900.02890.09800.02530.11680.105700.11890.09310.07340.08860.05590.08730.097300.08970.05280.16680.05840.05470.17780.06940.10870.06180.07620.11850.08200.12780.15580.10180.14440.048700.19650.09850.03360.04790.10350.12810.07090.02970.08050.09120值0.57620.63240.58800.64510.65330.58860.64720.83890.52020.51827．建立BP神經(jīng)網(wǎng)絡(luò)，訓(xùn)練網(wǎng)絡(luò)，測試網(wǎng)絡(luò)(原理公式見報告P31)7.1輸入