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양승윤,김정훈,김경섭,김재산,박귀호,김기원,이상호,Yang Seung-Yun,Kim Jeong-Hoon,Kim Kyung-Sub,Kim Jae-San,Park Kwi-Ho,Kim Gee-Won,Lee Sang-Ho 한국군사과학기술학회 2005 한국군사과학기술학회지 Vol.8 No.1
In this study, Experimental analysis on submarine cable tension was performed for the safe and efficient laying and recovery of a submarine cable. The tension analysis was done through the analyzed data using the cable dynamic theory and the measured data using the experiment. The analyzed cable tension was able to decide requirements for the purpose of laying and recovery of the submarine cable. As the result of tension analysis for a Submarine cable, it was shown a proper feasibility to determine the laying and recovery conditions of the submarine cable.
Photocrosslinkable Biopolymers for Enhanced Tissue Adhesion and Local Drug Delivery
Seung Yun Yang(양승윤) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Photocrosslinkable biodegradable polymers have emerged as a new class of biomaterials in tissue adhesion and drug delivery. In part 1 of my talk, I will present in situ photocrosslinkable hyaluronic acid (HA)-based tissue adhesives, providing tunable mechanical properties and firm tissue adhesion under wet and dynamic conditions. Depending on the degree of photocrosslinkable groups, mechanical and adhesive properties were improved. In part 2, I will present a radioactive HA hydrogel microparticles, which can be used for local radiotherapy with minimal off-target biodistribution. The radioactive HA microgels exhibited a prolonged radioactivity kinetics similar to the natural decay of radioisotope, thereby providing long-term and predictable radioactivity. Moreover, using a rat model, we further confirmed the local retention of photocrosslinked HA microgels around the injected site and their high biocompatibility throughout the application period.
무인 수중운동체의 $H_{\infty}$ 심도 및 방향 제어기 설계
양승윤,Yang, Seung-Yun 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.12
In this paper, H(sub)$\infty$ depth and course controllers of autonomous underwater vehicles using H(sub)$\infty$ servo control are proposed. An H(sub)$\infty$ servo problem is foumulated to design the controllers satisfying a robust tracking property with modeling errors and disturbances. The solution of the H(sub)$\infty$servo problem is as follows; firest, this problem is modified as an H(sub)$\infty$ control problem for the generalized plant that includes a reference input mode, and than a sub-optimal solution that satisfies a given performance criteria is calculated by LMI(Linear Matrix Inequality) approach, The H(sub)$\infty$depth and course controllers are designed to satisfy the robust stability about the modeling error generated from the perturbation of the hydrodynamic coefficients and the robust tracking property under disturbances(was force, wave moment, tide). The performances(the robustness to the uncertainties, depth and course tracking properties) of the designed controlled are evaluated with computer simulations, and finally these simulation results show the usefulness and applicability of the propose H(sub)$\infty$ depth and course control systems.
양승윤,이만형,Yang, Seung-Yun,Lee, Man-Hyung 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.3
This paper considers a sliding mode controller for a depth and course control of a class of submersible Vehicles. Since the vehicle used here shows complex dynamic characteristics sensitive to speed variation and buoyancy, robustness in control of vertical and horizontal plane motions of the vehicle is achieved by using the sliding mode controller of which a structure varies according to a pre-designed principle, so called the variable structure control. To compare this controller with another in robustness, PID controller for the same model of vehicle is designed. From various simulations for two controllers, it is shown that the sliding mode controller is the more robust anainst to modeling errors and disturbances.
양승윤,Yang, Seung-Yun 제어·로봇·시스템학회 1999 제어·로봇·시스템학회 논문지 Vol.5 No.4
This paper contains the design specification and detail design for a towing winch system. We analyze operating condition of the system and decide the design specification for the winch system, and also perform a detail design for the subsystem such as hydraulic winch system, control equipment and power supplier at the full scale development. The performance of designed towing winch is established by load tests and sea trial tests.