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PEMODELAN KENDAll LOGIKA FUZZY (FUZZY LOGIC CONTROLLER) PADA PERANGKAT PEMINDAI GAMMA
2013
MODELING OF FUZZY LOGIC CONTR O LLE R ON G A M MA SCANN I NG DEV ICE . Modeling and simuletion of controller to set the high position an d di rec t i on o f the so u rce of g amma radiation isotope Co-60 and Nal(TL) detector of gamma s canning d ev i ce by using f u zzy logic controller, FLC has been done. The high positions and in the righ t d i rect i on o f g a mma ra diation and Nal (TI) detector obtained the optimal enumeration . Th e c o unt i n g d at a obt ai n ed f ro m gamma scanning device counting system is affected by the instability of hi gh pos iti on and d i r e c tion of the gamma radiation source and Nal(T1)detector or the heigh t and d i rect i on a r e not equal between the gamma radiation source and Nal(TI)detector. Assumed a high po s iti o n an d d i r ecti o n of r adiation sources can be fixed while the high position detector h (2, 1,0 , -1 , -2 ) c a n b e a d j us t e d up and down and the detector can be changed direction to the left or right an g l e w (2, 1 , 0 , - 1 , -2) when the position and direction are no longer aligned with the di r ection o f th e s o u rce o f ga m ma radiat i on, the counting results obtained will not be optimal. Mo v ement d etecto r dir e c t ion towards the left o r r ight and the high detector arranged by the DC moto r using fuzz y lo g ic co n t r o l in orde r to o bt a in the amount of output fuzzy logic control which forms th e op t imal o u t pu t q uanti ty count . The variation of height difference h between the source position of the gamma rad iati o n det ec t or and change direction with the detector angle w becomes the input variable members hi p f u n c t io n (member function) whereas the fuzzy logic for the output var i able membership f u nct i on of fu zzy logic control output is selected scale fuzzy logic is directly proportional to the amount of o pt imal c ounting. From the simulation results obtained by the relationship between the amount of dat a output variable of fuzzy logic controller with the amount of data input variable height h and direc t ion detector w is depicted in graphical form surface. Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */
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PEMODELAN KENDALl LOGIKA FUZZY (FU ZZY LOGIC C ONTROLLER) PADA PERANGKA T PEMINDAI GAMMA . Telah dilakukan pemodelan dan simulasi kendali untuk mengatur posisi tinggi dan arah sumber radiasi gamma isotop Co-60 dan detektor Nal(TL) perangkat pemindai gamma dengan menggunakan metode kendali logika fuzzy (fuzzy logic controller, FLC). Dengan posisi tin ' ggi dan arah yang benar dari radiasi gamma dan detector Nal(TI) diperoleh hasil pencacahan yang optimal. Data pencacahan yang diperoleh dari sistem pencacahan perangkat pemindai gamma dipengaruhi oleh ketida k stabilan posisi tinggi dan arah antara sumber radiasi gamma dan detektor Nal(TI) atau ketinggian dan a rah yang tidak sama antara sumber radiasi gamma dan detektor Nal(TI) . Dias u msikan posisi tinggi dan arah sumber radiasi bisa diatur tetap sedangkan posisi tinggi detektor h (+2,+1,0, - 1 , -2) dapat diatur naik-turun dan arah detektor dapat diubah arah ke kiri atau kanan memben t uk sudut w (+2, +1,0,-1,-2) bila posisi dan arah tersebut tidak segaris lagi dengan ara h sum b e r radiasi g amma maka hasil pencacahan yang diperoleh tidak akan optimal . Gerakan a ra h detektor k earah kiri atau kanan dan tinggi detektor diatur sedemikian rupa oleh motor DC de ng an meng g u n akan kendali logika fuzzy sehingga diperoleh keluaran be s aran kendali lo g ika fu z z y yan
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