一种飞机结构结冰监测及自适应除冰的模拟试验

:1999-11-05;:2000-06-02:(19872033)、(97B5206)、333:　　:1000-6893(2000)06-0575-03,,(,　200016)RESEARCHONSELF-ADAPTIVEDEICINGUSINGWAVELETANALYSISANDSHAPEMEMORYALLOYYUANShen-fang,TAOBao-qi,SHILi-hua(SmartMaterialandStructureInstitute,NanjingUniv.ofAero.andAstro.,Nanjing210016,China)　:,,,。,,。:;;;;:V244.1　　　:AAbstract:Thisworkwasaimedtomonitortheiceaccumulationonflightstructuresanddeiceafterself-diagnosingbyusingembeddedsensorsandactuators.Waveletanalysiswasappliedtodiagnosetheemergencyoficeanditsgrade.Thedeicingcouldbedonebyshapememoryalloy.Themethodproposedcouldbeanactivedeicingmethod,whichcansaveenergyandcanbeusedtocomplexstructures.Keywords:waveletanalysis;piezo-electricsensor;shapememoryalloy;deice;numericalsimulation　　,,,。,、,。,,,。,,,。NASAClevelandOhioLewis,,1.27cm,[1～3]。(Thermion),,,,[2]。[3]。1　[4,5],,。,,2,1。f(t)∈L2(R),f(t)f,ja,b=∫∞-∞f(t)ja,b(t)dt=∫∞-∞f(t)1|a|jt-badt(1):a;b;ja,b(t);ja,b(t),j-a,b(t)。a,b,a=am0,b=nb0am0,m,n,a01,b00,f,jm,n=a-m/20∫∞-∞f(t)j(a-m0t-nb0)dt(2)　　,Daubieches,,21　62000　　11　　　　　　　　ACTAAERONAUTICAETASTRONAUTICASINICA　　　　　Vol.21No.6Nov.2000,4Daubieches(DB4)。(1)　　,,。,。1,1　Mq(t)+Cq(t)+Kq(t)=Fu(t)(3)M=m1000m2000m3;C=c1+c2-c20-c2c2+c3-c30-c3c3;K=k1+k2-k20-k2k2+k3-k30-k3k3:M;C;K;F;q(t);q(t);q(t);u(t)。(3)x(t)=Ax(t)+Bu(t)(4):x(t)=q(t)q(t);A=0I-M-1K-M-1CB=0M-1F(5)　　。,m1=m2=m3=1,k1=k2=k3=4,c1=c2=c3=0.02,2。,m1=m2=m3=1,k1=k2=k3=4t≤1504.4150t≤3004.8t≥300,c1=c2=c3=0.02t≤1500.022150t≤3000.024t≥300　　,2　,10%20%t=150mst=300ms,,DB43。3,,,,,,t=150mst=300ms,。,,1,,。,,1。3　(2)　　,。4。-,4,4,1。、PZT。,。,,,。250576　　　21　kHz。,,,2kHz。,,250g,500g。41DB45。1。4　5　,,,,:、、、、、。2　(SMA),,,。,,,,,。,,,,。,,,SMASMA。SMA,:SMA,,,[6]。NiTiSMA。,NiTiSMA,6%～8%;,690MPa。0.1mmNiTiSMA6,6　,。:,;,,,,,。,。　　　[1]　HickmanGA,GerardiJJ,FengY.Applicationofsmartstructurestoaircrafthealthmonitoring[J].JournalofIntelligentMaterial,SystemsandStructures,1991,13(3):411～430.[2]　.[J].,1992,19(2):22～25.[3]　.[D].:,1997.[4]　.[M].:,1995.4～20.[5]　,.[M].:,1994.5～10.[6]　,.[M].:,1992.:　,1968,,。1、5,2,2,20。577　6: