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황대규,오태석,김일환 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.B
This paper describes a design of an induction motor control system using a 2 degree-of-freedom PI controller to compensate the effects of disturbance without degrading tracking performance. On the basis of vector control principle, the control system is simulated by using the ACSL and implemented on a DSP system(TMS320C31). In designing the 2 DOF controller, we can tune the performance of either the tracking or disturbance rejection independently without affecting the other. With the experimental results, the 2 DOF controller has shown a better performance in command tracking and disturbance rejection than a conventional PI controller.
VP-BEM 기법을 이용한 초공동 수중 운동체의 형상 및 수심 변화에 따른 수치해석
황대규,안병권,박정훈,전윤호,황종현,Hwang, Dae-Gyu,Ahn, Byoung-Kwon,Park, Jeong-Hoon,Jeon, Yun-Ho,Hwang, Jong-Hyon 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.2
In recent years, the maturity of the technology for a high speed underwater vehicle using supercavitation increase, it is entering the stage of applied research for practical use. In this study, hydrodynamic performance of the supercavitating object was evaluated by using a Viscous-Potential based Boundary Element Method(VP-BEM). 27 models with different shape parameters such as body diameter, length and fore-body shape were considered. The process of the supercavity development of each model was simulated, and drag generated according to operating conditions such as changes in water depth was analyzed.