MUC LUC Bang giai thich cac chir viet tat Danh sach nhung nguoi tham gia thirc Men da tai Danh muc cac bang so lieu Danh muc cac hinh Tom tat cac ket qua nghien cuu chinh ciia da tai BAG CAO TONG KET 6.1 Dat vanda 6.2 Tong quan cac van de nghian cuu 6.3 Muc tiau vaNpi dung Nghian cimciiaDa tai 6.4 Dia diam, thai gian va phuong phap nghian cuu 6.5 Ket qua nghien cuu 6.6 Thao luan 6.7 Ket luan va kien nghi 6.8 Tai lieu tham khao PHULUC DAI HOC Q L O C GIA HA NQi TRUNG fA Y)e tai da gop phan phat trian buac dau mot bp phan mam giam sat thai gian thuc, mot modun phan tich hien trang cong trinh va se tiep tuc dugc khai thac tiep cho phuc vu nghien cuu va dao tao > Da tai da tang cuong kien thuc cho cac can bp ciia bp mon ve xir li tin hieu, giam sa1 cong trinh BAO CAO TONG KET 6.1 Dat van de • Cimg voi toe dp xay dung cac cong trinh cau duang, nha xuong hien thi a Viet nam ciing da xay khong it nhimg tai nan sap cau hay sup nha Tir co the thay viec giam sat cac cong trinh xay dung la quy trinh v6 ciing can thiat Nhiing tuu linh vuc xu ly tin hieu dugc ket hgp voi cac kian thirc ve co hpc da cho phep xay dung cac he thong giam sat cong trinh dang tin cay Mot nhimg nguyan tac truyan thong cua cac he thong giam sat la phuong phap phan tich rung Phan tich rung dpng co tha dimg kiem tra su hu hai cua cac cong trinh xay dung va vi tri cua cac diam hu hai Phan tich rung ciing co the sir dung de xac dinh su xuong cap cua cac cong trinh xay dung sau mot thoi gian dai dua vao sir dung Ap dung cac ky thuat phan tich rung co tha dua cac thiat ka xay dung co hieu qua, tin cay hon thi cong xay dung dong thoi giiip cho viec thay the va sua chixa tai cac vi tri chinh xac Hinh I Mot chiec cau hi sap 6.2 Tong quan cac van de nghien ciru Giam sat cong trinh (SHM) dugc dinh nghia nhu chuoi qua trinh thu thap, xir li va phan tich dn lieu nham tao diau kien thuan Igi cho viec quan li cong trinh xay dung Cho toi da co rat nhiau cong trinh nghien cuu ve van de nhien van rat nhiau van da can phai tiep tuc dau tu nghian cuu Da thuc hien qua trinh giam sat thi phai quan sat dugc dap ung dpng cua he thong mot khoang thai gian xac dinh Viec quan sat dupe thuc hien nha sir dung mot to hgp cac cam bien dugc lap dat tren cac cong trinh can theo doi Nhimg thong tin vl hu hong hien tai (nau co) ciia cong trmh se dat dugc nhof cac kat qua luong kat hgp voi cac phan tich thong ka Voi cac giam sat dai han, thong tin dau cua he thong giam sat se dugc cap nhat deu dan, phuc vu cho viec theo doi tinh trang ciia cong trinh theo thoi gian va cac tac dpng moi truong Khi trai qua cac bian co bat nga nhu dpng dat hay qua tai thi SHM dupe dimg nhu mot he thong giam sat "thai gian thuc" ve tmh trang cua cong trinh Mot he thong giam sat lien tuc duoc mo ta nhu tran hinh Cong trinh May tinh phu (xir li tai cho) To horp cam bien Thu th^p dSt li^u Truyen khong da aZ May tinh trung tarn m:^ Phan tich da U^u va bao cao Hmh He thong giam sat lien tuc Nhung phan tich rung thuc nghiem va thong ka la cac phuong phap nhieu trien vpng cho linh vuc SHM Nguyan tac cua phep la tran be mat cua cau true cong trinh Nhimg hu hong se dugc xem la nhung thay doi khac biet ve dac trung he thong boat dpng tot so voi tinh trang hien tai (hoac tuong lai) Trong thuc te tin hieu rung dpng biau dian mien thai gian thuong khong phai la dang tin hieu dieu hoa ma thuong la mot tin hieu rat phuc tap Diau co nghia rung dpng thu dugc la rat nhiau phan rung gay nan Hay noi each khac la tong hgp cua nhieu nguon rung khac Mot phep phan tich rung chi tot dii lieu sir dung la dii tin cay, do thiat bi dimg de thu thap dxt lieu la rat quan trpng Co ba loai thiat bi co tha dimg de luong va theo doi rung dpng: dau dich chuyan, bp bien doi van toe va gia toe ka Moi mot thiet bi co mot gioi ban va ung dung riang do gia toe la phuong phap tot nhat de xac dinh lire tir cac may rung Cam bian gia toe se bien doi cac nang lugng co hpc tin hieu dien Dac diam noi bat ciia cac cam bian gia toe MEMS la chat lugng tot va gia re nen da ung dung vao thuc ta dai song Phuong phap rung co the dugc mo ta ban dau bang phuong trinh ciia dinh luat II Newton Trong mo hinh chung ta can quan tam tai ngoai luc va dap ung cua he thong theo thai gian Nau kich thich cau true boi mot xung (tuong tu nhu go mot tieng chuong) thi dap ung thu dugc se la mot dao dpng bi suy hao Co tha thay ro vai tro cua khoi lugng, dp cung, he so suy hao va dieu kien bien bai toan Dao dong cong huong gay boi su tuong tac giiia tinh chat quan tinh va dan hoi cua vat lieu cau true cong trinh Tat ca rung dpng dugc coi la ket hgp cua luc va cong huong Dao dpng kilu luc bao gom cac noi luc, sir mat can bang, ngoai luc va kich thich moi truong Dao dpng cong huong xay cong trinh bi tac dpng a mot tan so cong huong nao cua cau true Cac mode cong huong phu thupc vao tinh chat cua cau true cong trinh Cac tan so cong huong dugc xac dinh boi cac tinh chat vat lieu (khoi lugng, dp cung, va he s6 suy hao) va diau kien bian cua cau true Da thay rang tinh chat vat lieu thay doi hoac diau kien bien thay doi thi cac mode cong huong cung bi thay doi (do chinh la nguyen ly ca ban cua viec giam sat cong trinh theo kiau rung) Tat ca cac tham so rung thuc nghiem se thu dugc bang each dac trung tan so cua he thong Dac trung tan so co dugc tac dpng len cau true cac rung dpng voi tan so khac (hinh 3) Tat ca cac cau true deu co tai mode cong huong (ba tinh tian va ba quay) Hinh Mode shape dau tien cua cau luc truac (a) vd sau hu hai (b) Cac thuc nghiem se dugc tien hanh true tiap tran cau va la minh hoa cho tinh huong dimg phuong phap rung de phat hien cong su hu hai cua cong trinh Hinh la so dap ung rung ciia mot cong trinh xay dung va hinh la minh hoa cho viec nhan dinh he thong bi hu hai Kich thich rung nhan t^o Rung dong moi trudng xungquanh Giam sat rung thai f)^ gian dap ung xung J dap ung FFT n thuc f FRF \ Thong s6 mng: Noi \ - tin s6 suy / - h? s6 suy hao / - mode shape y Hinh Do dap img rung dB dB ft cac dinh gia / \ Khong hu hai He thong hu hai Hinh Dac trung tan so thu duac dung phuong phap lap: truac vd sau hu hai 6.3 Muc tieu va Noi dung Nghien cuu cua De tai Muc tieu cua de tai la ung dung rung cua cam bian gia toe ba chieu che tac tren cong nghe vi co dien tir (MEMS) vao cac muc tieu dan dung Cu the o day la sir dung cam bien de rung, phuc vu cho viec giam sat tinh trang boat dpng cua cau De dat dugc cac muc tieu tren, tap the nghian cuu cua de tai da thuc hien cac noi dung nghian cuu dugc trinh bay cu tha cac muc dual day 6.3.1 Phan tich rung diing bien doi Fourier a Bien doi Fourier cua tin hieu rai rgc DTFT Xet tin hieu x(n) la rai rac v6 han, dugc lay mau tir tin hieu tuong tu voi tan so T Voi Q= o).T Ham DTFT dugc dinh nghia nhu sau: X ( " ) = 2;x(«).exp(-yQ«) (1 Ta nhan xet thay tin hieu roi rac mien thoi gian nhung DTFT lai lian tuc va tuan hoan mien tan so DTFT chinh la ham phirc theo bian tan so thuc Ta gpi DTFT la phuc (complex spectrum) hay ngan gpn la cua tin hieu roi rac x[n] Tir day ta thay can thiat phai xay dung bien doi Fourier roi rac cho truong hgp day x(n) hiru ban b Bien ddi Fourier cua tin hieu rai rgc DFT Truong hgp x(n) hiru ban, chieu dai N (0 < n < N-1) Ikjt Dat Q = (k Z) ta co bien doi Fourier roi rac cua x(n): n X ( k ) = X x(n).e^^" (2; Hay X(k) = x(n)(cos(-^kn) - i sin(-^kn)) (3; - Lugng phep tinh: DFT phai thuc hien N^ phep nhan phuc va N(N-I) phep cong phuc Suy so phep tinh cong va nhan so thuc: + 2N^ phep tinh lugng giac + 4N^ phep nhan so thuc + N (4N-I) phep cong so thuc + Mot so phep toan chi so va dia chi da nap x(n) 10 Nhugc diem: thai gian tinh toan se qua dai va dung lugng nha cua thiet bi se phai Ion c Bien doi Fourier nhanh FFT Truong hgp N=2' TV Ta chia day x(n) day co chiau dai —: - Day g(n) gom cac gia tri chan: g(r) = x(2r) - Day h(n) gom cac gia tri le: h(r) = x(2rHl) r: 0, N Taco: X(k)N= Y X W - W H ' " ( W ^ ^ e ^ ) -^ (4) x(2r+l)^.WN X(2V)KM^'''^Y (2r+l)k (5) r=0 = X g(r)^.W^^^ + ^ h(T)K.WK'\w^' (6) r-0 = X g(r)^.W^* + W N ' X h(r)i.W^* (7) r=0 G(k) + WN" H(k) eCO) - xtP3 0(0) CCU-XC25 0(1) ( vai k: 0, A^ - ) (8) y^ xco> \ CDFT)eC2) - G(2) KC4) \ ^ Gt3) \ eC3) - xC6) ^ / " \ ^ \ ^ ^ / \ / ^ • ^ /W2 JXT /^W3 X(2> XC3) JK KO) = x a ) H(0) hCD^'tpS H(l) K2) - xp3 fDFT)- //x\-^ > V/4 H(2) / H(3) / / V V75 \ " V "we K : - JtC?: 11 XC6) XC7) W7 Hinh Sa FFT-8 diem chia XC5) LCn CAM ON Be hoan khoa luan nay, truac hit em xin bay to long biet on sau sSc toi cac thay giao Tran Due Tan va Liru Manh Ha Thky da tan tinh huong dan, giup da em qua trinh lam khoa luan Dong thai em xin dugfc cam an cac Thay giao, Co giao Trircrng Dai Hoc Cong Nghe Dai Hoc Quoc Gia Ha Noi da truyen dat cho em nhieu kien thuc bo ich suot thai gian hoc tap tai truong Xin cam an su ho trg tu de tai QC 08.13 Cu6i cung, em xin cam an tat ca ban be, gia dinh va nguai than da giup da, dong vien em thai gian thuc hien khoa luan CD 00 TO C o> X H c on < >< n>i O c o> o < 3 H c3 era 3* X •o> era era 3- s cro o o n ©> s QTQ B-fD> s 5» ^ C3 CD O O CD a 52 •t era 0^ o»-o> 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CD n: o o o> 00 era o> OQ 00 3- o n o> 00 o> 00 00 O o> 00 OQ o o> OQ o> OQ O OJ 00 o o> OQ 3* 00 iz H 00 X Z c era c z era c ra>t OQ c 00 -3 -) o i- o c p 3 c 00 era < < 3* H a era a 00 00 o o> 00 O OQ §' OQ OQ o o> OQ a CD CD X §' n n o> 00 o> OQ 00 CJ> 00 a X r- o> OQ H O n H o z v; 00 X o 00 00 00 00 n 00 O o> OQ < X 3C- c- H -1 o H -0 =r c- 3* W O C3 C? 00 > n a a g ni < SKH ThS 00 o O c v; 00 o < 00 00 O o X X 'G a X 5i —• o>00 o Q C_ o 3- C 00 !», H Z O a 7.4 BSn De cirtmg va Hop dong DAI HOC QUOC GIA HA N O I TRiroTSG DAI HQC CONG NGHE DE CirONG DE TAI NGHIEN ClTU KHOA HOC DO TRir6>JG DAI HOC CONG NGHE QUAN LY CAP DAI HQC QUOC GIA HA NOT Ten de tai Tieng Viet: Gidm sdt cong trinh dung phan tich rung tren cdc cam bien gia tdc chiki Tieng Anh: Application of Vibration Analysis for Civil Engineering Using D Accelerometers Thai gian thuc hien: 12 thang (tu 07/2008 d^n 07.2009) De tai thuoc linh vuc uu tien: De tai co trung vai mot dl tai da hoac dang tian hanh khong? nk co neu [v do: De tai kJiong trung vai dh tai khac da hoac dang ii6n hanh Chu tri de tai: /?//• - Ho vd ten: Tran Due Tan Nam v 'Nam sinh: 1980 - Chuven mon dao tao: dien tit vien thdn^ - Hoc ham, hoc vi: Thac sy - Chitc vu: Giang vien - Don vi cdng tdc (Truang, Vien Khoa truv thuoc, Trung tam): Khoa Dien Tu - Vien Thong, truang Dai hgc Cong Nghe - Dia chi lien he: Nha G2 144 Xuan Thuy Cau Gia>'- P-Ia Noi Sddienthogi: 0904182389 - Tom tat hvgt dong nghien ciai cua Chu tri de tdi: (Cac chuang trinh de tai NCKH da tham gia cac cong trinh da cong bo gan day lien quan tai phuang huong ciia dc lai) Cap quan 1\ noi cong bo Ten de tai/cons trinh \ Tu each tham aia Thai eian Nha nuoc (chuang trinh I/ng dung cong nghe diem nha nuac \e 2004MEMS dien tir Thanh vien Khoa hpc \'a Cong nghe 2006 vien thons Nano 8.1 1) Nghien cuu tich hgp he thong dan duang quan tinh tren ca so cam bien I 2005-2008 j vi ca dien tu phuc vu dieu khien dan duang phuang tien chuyen dons Thanh vien DIIOGHangi Ca quan phoi hgp va cac cong tac vien chinh cua de tai • TT Cac cona tac vien chinh Hp va ten Hgc vi Nguyen Thang Long Tien sT Nguyen Phii Thuy Huvnh Huu Tue Chuyen nganh Khoa hgc \at lieu Tien sT khoa Khoa hgc vat lieu hgc Tien si khoa Dien tir vien thong hgc ; Co quan cong tac Khoa Dien tir vien thong Khoa Dien tir vien ' thong ! Khoa Dien tir vien thong Muc tieu: Phan tich rung dgng la mot nhu cau hire thiet \a co rat nhieu ii'ng dung thuc ta, dac biet la viec giam sat tinh trang ciia he thong cau duang cac cong trinh xay dung hien dai hay cac he thong canh bao Dieu na\' rat co y nghia viec du doan va uac lugng cac su co co the xay Muc tieu cua de tai la irng dung rung ciia cam bien gia toe ba chieu che tao tren cong nghe vi ca dien tir (MEMS) vao cac muc tieu dan dung Tom t^t noi dung nghien cuu ciia de tai: Tron2 thuc ti tin hieu rung dgng bieu dien mien thai gian thuong khong phai la dang tin hieu di^u hoa ma thuong la mot tin hieu rat phirc tap Dieu c6 nahla rung dgng thu dugc la vk nhi^u phan rung ga\' nen H.a> noi each khac la t6ng hgp ciia nhi^u nguon rung khac Mot phep phan tich rung chi t6t dir lieu sir dung la du tin cay do thiet bi dung dathu thap dir lieu la r^t quan trgng Co ba loai thi^t bi c6 the diing de luang va theo doi rung dgng: d^u dich chuyan, bg bian d5i van i6c va gia toe kc Moi mot thiet bi c6 mgt^giai han va ung dung rieng do gia t6c la phuang phap tot nhk da xac dinh luc tii- cac may rung Cam biin gia t6c se biin doi cac nang lugng co hgc tin hieu dien Dac dilm n6i bat cua cac cam bien gia toe MEMS la chat lugno t6t va sia re nen dl irng dung vao thuc tl doi song Dir lieu rung thu dugc tir'ca^Ti biin duac xir ly sa bg r6i dua ve may tinh Tai ma>- tinh cac th^ng so dac truno ciia dao dons duoc danh gia va phan tich theo thai gian thuc Cac phuang phap phan tich danh gia tren mien thai gian va tan so dugc ap dung hicu qua de tai , u- i • r9 Cac chuyen dl nghien ciru du kien ciia de tai (ten va no dung chinh cua m^ng chuyen de): Chuyen dl 1: Cac phuang phap luan Noi dune: N-hien cuu va lua chon cac phuang phap phan tich rung dong Nahien cuu cac cam bign va mach su dung cac phuang phap do • bi Xay dirng he thong thu thap tin hieu dua tren cam biin aia t6c Chuyen de 2: Xu ly tin hieu phan tich va danh 2ia tinh trans con^ trinh - thilt ^ ^ Noi dung: • Tiln xir ly tin hieu thu dugc • Xay dung phan mem nhiing xir ly va dilu khiln • Xay dung modun phan tich danh sia hien trans 10 Cau triic du kien bao cao ket qua cua dl tai (chi tilt hoa cac chuong muc): • Tong quan de tai • Ket qua chuyen de • Ket qua chuyen de • Ket luan va kien nghi 11 Tinh da nganh va lien nganh cua de tai: - De tai lien quan den nganh chuyan nganh nao? Dien tu - Vien thong, Vi co dien tir, Xu ly tin hieu - Tinh da / lien nganh the hien nhu the nao noi dung va qua trinh trien khai cua de tai? San pham cuoi ciing ciia de tai la tong hgp ciia cac kien thirc tir cac nganh noi tren 12 Phuang phap luan va phuang phap khoa hgc sir dung de tai 13 Sir dung nhirng trang thiet bi nao ciia Bg mon, ciia Khoa: su dung mot so thiet bi CO sin khoa nhu khoi dan duong quan tinh may tinh dao dgng ky mo han va mot so thiet bj khac 14 Kha nang hgp tac quoc te 15 Cac hoat dons nahien ciru ciia de tai: Nghien ciru ly thuyet Dilu tra khao sat Bien soan tai lieu Vilt bao cao khoa hgc Hoi thao khoa hgc Tap huan Hoat dgng khac 16 Kit qua du kien: 16.1 Kit qua khoa hgc X X X X X - Dir kien nhirng dong gop cua de tai: So bai bao, sach, bao cao khoa hgc du kiln se dugc cons bd: o 01 bai bao khoa hgc tap chi nuac o 01 bao cao khoa hgc tai hoi nghi trons nuac 16.2 Ket qua irng dung - San pham cong nghe: o 01 bg phan mim phan tich danh gia hien trang cong trinh thai gian thuc - Kha nang irng dung thirc tl cua cac kit qua: Phan tich rung dgng la mot nhu cAu birc thilt va co rdt nhilu imo duns trons thuc tl dac biet la viec giam sat tinh trang cua he th6ng cdu duong cac^cong n-inh xav dung hien dai hay cac he th6ng canh bao 16.3 Ket qua dao tao 16.4 Ket qua ve tang cuang tilm luc cho dan vi ^ Bo xung kien thirc cho can bg vl linh vuc ddn duang \ a \ir ly iin hieu s6 17 Tong kinh phi de nghi: 20 trieu dong 18 NOl DUNG VA TIEN DO THUC HIEN CUA DE TAI (CAC CONG VIEC CAN TRJEN KHAI THOI HAN THUC HIEN VA SAN PHAM DAT DU'OC) TT Hoat dong nghien CIJU j Thu thap va viet tong quan tai lieu Thoi gian thirc hien TilDan th an thans 6/2008 •/2008 Xay dung de cuong nghien cuu chi tiat i 7/2008 8/2008 San pham khoa hoc 01 tong quan 01 de cuons Chuyen de Dieu tra khao sat thi nghiem, thu thap i 8/2008 !/"> 009 so lieu 01 phan mem thu j nshiem ! Chuven de/Noi duns Xu iy ket qua Viet bao cao cac chuven de 2/2009 : 4/2009 So chuyen de (nhu muc 2) Hoi thao siQ'a kv B6 sung so lieu/thir nghiem/irng dung Tons ket so lieu 4/2008 6'2009 01 bao ciio Viet bao cao tong hgp 6/2009 01 bao cao Hoi thao lan cuoi Hoan thien bao cao ' i : Nop san pham ! • Nshiem thu de tai ^ i 6/2009 01 bg phan mem ! 6/2009 i ! 19 PHAN BO KINH PHI Noi duns • TT Xay dung de cuang chi tiet Thu thap va viet tong quan tai lieu " Thu thap tu lieu (mua thua) Dich tai lieu iham khao (so trang x gia) Viet tons quan tu Hau Dieu tra khao sat thi nghiem thu thap so lieu, nghien ciru Chi phi tau xe cong tac phi Chi phi thue mudn Chi phi hoat dgng chuyen mon Thue mua sam trang thiet bi nguyan vat lieu Thue trang thiet bi Mua trang thiet bi Mua ngu\ en vat lieu cay ^ Viet bao cao khoa hgc nghiem thu Viet bao cao Hoi thao Nshiem thu Chi khac Mua van phong pham In an photocopy Quan ly phi Tong kinh phi Kinh phi (VND) ; 1.000.000'1.000.000 ; i 20.000.000 \ i i \ 4,000.000 16.000.000 ! 2.600.000 \ 2.600.000 i i i i \ i 2.000.000 : 1.100.000 i 400.000 \ 500,000; f 400.000 i j 1,400.000 28.000.000 •V \ TAI LIEU THAM KHAO D £ VIET DE CUOT^JG L Tai lieu tieng Viet Tai lieu tilng nude ngoai [1] Juang, J.N and Pappa, R.S (1985) ''An Eigensystem Realization Algorithm for Modal Parameter Identification and Model Reduction.'' J Guid Control and Dyn pp 620-627 [2] Kiss, Szekely and Dunai (1998) "Fatigue Analysis of Orthotropic Highway Bridge Decks" Proceedings of the 2nd Int Ph.D Symposium in Civil Engineering Budapest [3] Kottegoda N T and Rosso R (1997), "Statistics Probability, and Reliabilinfor Civil aiid Environmental Engineers ", McGraw-Hill Companies Inc [ ] T Soderstrom and P Stoica S>stem Identification Prentice-Hall Englewood Cliffs (1989) (Section 1) [ ] S.R Ibrahim and E.C Mikulcik A time domain modal vibration test technique Shock and Vibration Bulletin 43 (1973) pp 21-37 (Section 1) [ ] J.S Juang and R.S Pappa An eigensystem realization algorithm for modal parameter identification and model reduction AIAA Journal of Guidance, Control and Dynamics 12 (1985) pp 620-627 (Section 1) [ ] N.M.M Maia and J.M.M Silva Theoretical and Experimental Modal Analysis Research Studies Press LTD Taunton (1997) Ngay =& thang 0*^am 2008 Chii tri de tai Ngay izthang O^nam 2008 Thii truans dan vi Tran Dire Tan TS.Trinh Anh Vu Ngay i i thang CI nam cJ oc y Phe dii\'et ciia Truans DHCN '^'••' " •' T R U O N G P H O N G OAO'TAOSAUOAi HOC V r K- €sAi M S ^ - T / f cn?v; KCKH ^Al HOC QUOC GIA HA NOI TRUONG DAI HOC CONG NGHE CONG HOA XA HOI CHIJ NGHIA VIEF NAM D o c lap - T y - Hanh phuc S6: /^.?r.72008/HD-KHCN Hd Noi ngdyZQ thdn:^ nam 200S HOP DONG THUC HIEN BE TAI NGHIEN CU L KHOA HOC CAP DAI HOC QUOC GIA HA NO! NAM 2008 - Can cir ve Qui dinh ve To chi'vc vd Ilogi dong cua Dgi hoc Oiak gia fid Xoi ban hanh liwo Oi/vei dinh so 600/TCCB ngdy 01 ihdng 10 nam 2001 cuu Dgi hoc (Jiu'Jc gia Hd \'ni qui (Tiii'h i/iivcn han ciia hieu Irm'mg cdc trufmg dai hoc ihdnh vien: - Cdn CH-thong bao so !liSi)-TB-KI!CN n-^d\- 29 thdng nam 2i)i}S ciu Giam (hk: Dui iuh' ()u('>c y::,/ Hd Xoi ve viec giao nhiem vu rd chi lieu ke hoach Khoa lioe ( dugc dure Inea khuon kho de tai mang ma so: QC.08.13, Dai hoc Qu6c gia Ha Noi, - Doi voi bai bao, bao cao dang o tap chi ky yeu hoi nghi quoc tc (licng Anh): "This work is (paniy) supported b>- the research projcei No QC-08,!3 grantee b\- Vietnam National University Hanoi", Dieu 6: Hai ben cam ket thuc hien diing cac dieu khoan da ghi ligp dong Trong qua trinh thuc hien hcrp dong hai ben c6 trach nhiem thong bao kip thoi cho nhung \an de vucrng mac va cung nliau ban bac tich cue tim bien phap giai quvet Hgp dong iir done duoc ihanli }y sau co bien ban hov> hoi dong khoa hoc danh gia nghiem iliu de rai w'n kel qua dap irng cac qui dinh hien hanh Dieu 7: Hgp dong lam 05 ban moi bci\ giCr 01 ban 02 ban gui ciio phong l"\'-lxd" ')! ban luu tai ohonu TC-HC DAI DfFN BKNB P C S TS Nguyen Ngoc Binh ThS Tran Due Tan 7.5 Highlight Project Title: Application of Vibration AnaKsis n,, ( ;• Accelerometers Code number: QC 08-13 Coordinator: Msc Tran Due Tan Implefiaenting Institution: Vietnam National Universit\ - lanoi Duration: from June 2008 to June 2009 Objectives: > Vibration analysis is the great need and can be use Hi \\ \\ especially in monitoring the status of bridges and other ^onsirouion x > The objective of this project is to propose the abilii\ u LISC Ml M^ '\i-ro accelerometer in vibration analysis for civil applications ( here is bndcc > To enable the participants to familiar with the upoo- in w • Main contents: > A good vibration analysis is only possible ulien ilic aL.;oi!c^l : r i : - Thus, choosing the equipment used to collect data is imponani sicp i MUML-^ >I C MEMS based accelerometers are good quality and cheap price lor praciiLal applications Vibration data from sensor is pre-processed and ihcn i io-web' •>- ' ' r •computer At computer, the parameters oi \ ibration i^ a^NC^^ : r d r ; \ • time ^ The analysis and evaluation processes ol the bridge ^ ^laiuN '\\ u ii ,;!, • imodal method are also focused in this projcci Kesulis obunnco USIIL MI^ DIAMOND / MATLAB tool shows the feasibilit\ ubcn applied i^' [v,.:!, i applications Methods: > Weekly seminar discussing series ha\e been arraiiLicd n-.1-N.' :: ; • > Experimental resuhs have been combined with theorciKal L.aop u.iih : Results obtained: > Study about the vibration theory using acceleratuMi sensors lu appi\ n> MM.,.'.construction work (here is bridge) > Build a vibration analysis system: write a real-time ^111 pync:\rv:^ • 'n, ; >' o ^accelerometer for the monitoring and alert > Apply the advance DSP algorithms to modal anaKsis o\ bndac niiukN H,,.,-,! i DIAMOND / MATLAB tool Conclusion and Future Work Vibration analysis is the great need and can be used ••^ 'oai- - M ': especially in monitoring the status of bridges and other o>o-iniui r x^ •• should be extended to really put into practical life Tom tat c^c ket qu^ nghien cihi chinh cua de tai Ten de tai: Giam sat cong trinh dimg phan tich rung tren cac cam bidn gia toe chiau Ma so: QC 08.13 ChuiS5emdetai: Th.s Tr^n Due Tan Co quan chu tri de tai: Truang Dai hoc Cong nghe, DHQGHN Thai gian nghien cmi: nam ( 06/2008 den 06/2009) M\ic tieu i^ ^ > Phan tich rung dong la mot nhu cau btrc thilt va co vk nhieu img dung thuc te, dac biet la viec giam sat tinh trang cua he thdng c4u duang, cac cong trinh xay d\mg hien dai > Muc tieu cua de tai la dk xuat kha nang ung dung rung cua cam bien gia toe ba chieu che tao tren cong nghe vi ca dien tir (MEMS) vao cac muc tieu dan dimg (6 day la cau) > Tao dieu kien cho cac vien de tai dugc nang cao trinh chuyen mon Npi dung > Mot phep phan tich rung chi tot du" lieu sir dung la du tin cay, do thilt bi dimg de thu thap du lieu la rat quan Dac diem noi bat cua cac cam biin gia t6c MEMS la chat luong tot va gia re nen de ung dung vao thuc te dai song Dir lif u nmg thu dugfc tir cam bien dugc xir ly sa bp roi dua vl may tinh Tai may tinh, cac thong so dac tnmg cua dao dong dugc danh gia va phan tich theo thai gian thuc > Quy trinh phan tich, danh gia tinh trang cau dua vao phuang phap phan tich dao dong rieng ciing dugc tap trung nghien cuu de tai Ket qua thu dugc nha sir dung cong cu DLAMOND/MATLAB cho thay tinh kha thi ap dung vao thuc tien Phuang phap > Nghien cuu ly thuyet, mo phong va mot so thuc nghiem buac dau Ket qua dat dugc > Tun hieu ly thuyet rung sir dimg cam bien gia toe de ap dung vao viec giam sat cong ^ ^ n h xay dung (a day la cau) >^Aay dung mpt h? th6ng phan tich dir lieu rung, viet chuang trmh STFT thai gian th\rc tren cam bien gia toe ba chieu phuc vu cho viec giam sat, canh bao > Ap dung cac thuat toan xir ly tin hieu nang cao viec phan tich dao dgng rieng cho cac mo hinh ciu dua tren cong cii DIAMOND/MATLAB Ket luan Phan tich nmg dgng la mot nhu chu birc thilt va co rat nhieu img dimg thuc te, dac bi?t la viec giam sat tinh trang ciia he thong cau duang, cac cong trinh xay dung hien dai hay cac he thong canh bao De tai nen dugc ma rong de co the thuc sir dua vao thuc tien cugc song 7.6 Phieu dang ky ket qua nghien cuu KHCN Ten de tai: Giam sat cong trinh dung phan tich rung tren cac cam bien gia toe chieu r* k MasoiQC 08.13 Co quan quan ly de tai: Dai hoc Quoc gia Ha Noi Dia clff 144, duong Xuan Thuy, Cdu Giiy - Ha Noi Di?nthoai: 37548664 % Ca quan chu tri de tai: Truang Dai hoc Cong nghe, DHQGHN Dja chi: Di?nthoai: 144, duang Xuan Thuy, Ciu Giiy - Ha Noi 37548664 Tong chi phi thuc chi: 28.000.000 d Trong do: - Tir ngan sach Nha nuac: 28.000.000 d -Nguonkhac: Thai gian nghien cuu : nam Thai dan \>k diu: 06/2008 Thai^an kit thuc: 06/2009 ^ Ten cac can bo phoi hgp nghien cuu: - Chu nhiem dl tai: Th.s Tran Due Tan - Nhihig nguai tham gia: TS Nguyen Thang Long, GS TSKH Nguyin Phu Thuy, Cn Luu Manh Ha Tom tat ket qua nghien cuu: > Viec giam sat cac cong trinh xay dung la quy trinh v6 cimg cin thiet Mot nhung nguyen tic truyin thdng cua cac he thong giam sat la sir dung phuang phap phin tich rung Cam biin gia toe MEMS dugc lira chon de rung bai chit ^gfiTong tot va gia re Du lieu rung thu dugc tir cam bien dugc xir ly sa bo roi dua vl may tinh Tai may tinh, cac thong so dac tnmg ca ban ciia dao dgng dugc phan tich theo thai gian thuc Nhung danh gia, tinh toan sau han ve tinh trang he th5ng ciing thu dugc nha tin dung cong cu DIAMOND/MATLAB ap dung cho cac du lieu mo phong hay thuc nghiem Kien nghi ve quy mo va doi tugng ap dung ket qua nghien cuu: Tron^nai gian sap tai, chuang trinh se co g ^ g ap dung vao thuc tien nlu nhu dl tai dugc ma rong va nhan dugc sir phoi hgp tir cac ca quan chuc nang va Vien khoa hgc (Bg GTVT, Vien ca hgc) Ben canh do, chuang trinh chan doan se dugc cai tien hem nua nha ap dung cac ky thuat xijr li tin hieu nang cao Chiic vy l^: Chu nhiem de tai Thu truang ca quan chu tri de tai Chu tich hoi dong danh gia nghiem thu chinh thirc Thu truang ca quan quin ly dl tai Ho va ten Tran Due Tan TL.GIAM D C [RUdNG BAM KHOA HQC •C6NC PH6TRU6NGBA^I miJ/^^fl^^^^^' ... a(coi), Phuong phap Monte Carlo L Tinh tri trung binh va dp lech chuan cua dac trung bian dp vi pha cua FRF Hxy(a)) Thu dugc tri trung binh Hi(co) dua tren dac trung bian dp va pha co thong so thong... trinh theo kiau rung) Tat ca cac tham so rung thuc nghiem se thu dugc bang each dac trung tan so cua he thong Dac trung tan so co dugc tac dpng len cau true cac rung dpng voi tan so khac (hinh 3)... trinh May tinh phu (xir li tai cho) To horp cam bien Thu th^p dSt li^u Truyen khong da aZ May tinh trung tarn m:^ Phan tich da U^u va bao cao Hmh He thong giam sat lien tuc Nhung phan tich rung thuc