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BLDC 모터 구동을 위한 신경회로망 PI파라미터 자기 동조 시뮬레이터
배은경(E. K. Bae),권중동(J. D. Kwon),김태우(T. W. Kim),김대균(D. K. Kim),전지용(J. Y. Chun),이승환(S. H. Lee),이훈구(H. G. Lee),김용주(Y. J. Kim),한경희(K. H. Han) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this paper proposed to Neural network PI self-tuning direct controller using Error beck propagation algorithm. Proposed controller applies to speed controller and current controller. Also, this built up the interface environment to drive it simply and exactly in any kind of reference, environment fluent and parameter transaction of BLDC motor. Neural network PI self-tuning simulator using Visual C++ and Matlab Simulation is organized to construct this environment. Built-u-p interface has it's own purpose that even the user who don't have the accurate knowledge of neural network can embody operation characteristic rapidly and easily.
이상현(S. H. Lee),배은경(E. K. Bae),신철준(C. J. Sin),전기영(K. Y. Jeon),전지용(J. Y. Jeon),오봉환(B. H. Oh),이훈구(H. G. Lee),한경희(K. H. Han) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
In this paper, The authors apply a state feedback control using an optimal control theory to improve the stability of the control and the dynamic response of the DC-DC converter system with a number of different loads. To execute a this state feedback control, The authors present the pole placement technique using Linear Quadratic Regulator(LQR) to optimally control the system. An integrator can also be included in the open-loop path in order to minimize the steady-state error of the output voltage. To confirm the superiority of the controller, The simulation results are presented.
상이 (相異) 한 선량의 자외선을 조사한 브로일러 병아리에 있어서 간장 비타민 D 농도의 경시적 변화
장윤환(Y . H . Chiang),강훈석(H . S . Kang),여영수(Y . S . Yeoh),김강수(K . S . Kim),조인호(I . H . Cho),배은경(E . K . Bae) 한국축산학회 1992 한국축산학회지 Vol.34 No.5
This study was carried out to elucidate the time course variation of liver vitamin D(VD) concentration of broiler Hubbard chicks fed VD-deficient diet for 31 days in a subdued light room and exposed to UVB light(maximum intensity at 297 nm) with dose of 0.204 or 0.408 mJ/㎠. The lipid in liver was extracted by chloroform-methanol (2:1) and VD fraction was separated by Sep-Pak silica cartridge. The VD contents were analyzed by normal phase HPLC. The control birds received no UVB irradiation showed the liver VD level of 5 ng/g. When 0.204 mJ/㎠ was treated to whole body of chicks, the liver VD level tended to increase until 90 hrs after irradiation, where the maximum value of 11 ng/g appeared. A decreased level of ng/g was present at 138 hrs after exposure. The peak value (16 ng/g) was shown also at 90 hrs after UVB treatment when 0.408 mJ/㎠ was applied. A low level of 5 ng/g was present at 138 hrs after irradiation. Consequently it was verified that 0.408 mJ/㎠ of UVB treatment produced more VD in liver of broiler chicks than the 0.204 mJ/㎠ did, and the highest level of liver VD appeared at 90 hrs after exposure.