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Eigenvalue Problems for Cooperation Robotic Manipulators
조중선 國立 昌原大學校 産業技術硏究所 1994 産技硏論文集 Vol.8 No.-
협동 로보트에 관한 두개의 고유치문제가 한개의 일차 구속조건과 또 하나의 이차 구속조건을 갖는 이차 최적화 문제로 부터 유도되었다. 이 두개의 고유치 문제들은 협동로보트의 구조적 특성을 해석하는데 중요한 역할을 한다. Invariant해를 보장하는 가중행렬(weighting matrix)에 따른 고유치문제의 해를 조사함으로써 협동 로보트의 구조적 특성이 분석되었다. 그 결과 wrench-compliant axis, 이차 목적함수의 구형장(spherical field) 및 타원형 장(ellipsoidal field)등의 중요한 특성이 새롭게 밝혀졌다.
이학근,조중선 國立 昌原大學校 産業技術硏究所 1996 産技硏論文集 Vol.10 No.-
The anemometer is one of the sensors that can measure the aircraft speed. This paper describes that the development of the system for measuring the aircraft speed for low-speed, low-height using anemometer. This system can compensate in order to the linearized zone for measuring aircraft speed. The wind tunnel test has been carried out with the hardware of the constand current anemometer and constand temperature anemometer using wheaston bridge circuit. The control Algorithm which selects the data for a linearized zome in a wide range of the wind speeds has been adopted. The system were formed and tested by introducing the mixed algorithmic approach used constant current circuit and constant temperature circuit in order to measure the aircraft speed in a wide range of the wind speed.
건설기계의 에너지 효율 제고를 위한 비-하이브리드 신기술에 관한 리뷰
조중선(Joong Seon Joh) 유공압건설기계학회 2016 드라이브·컨트롤 Vol.13 No.3
New non-hybrid approaches to improve energy efficiency of construction machineries are reviewed in this paper. Hydraulic systems are classified into four classes according to Backé’s classification and commercially promising new technologies are carefully chosen in each class. IMV, 3-Line CPR, Closed Circuit Displacement Control of Differential Cylinder, and Throttle-less Secondary Control are chosen as representative non-hybrid new technologies. Key principle of each technology is explained and representative references which run through each technology are selected. Advantages and weaknesses of each technology are discussed and compared from the view point of construction machinery manufacturers.
조중선,정경욱 國立 昌原大學校 産業技術硏究所 1995 産技硏論文集 Vol.9 No.-
Control of an electro-hydraulic servo-controlled winch system which has no distinct performance specifications is investigated in this paper. Because of the lack of the performance specification, the research is focused to finding effective parameters which give clear physical meanings for the behavior of the system. Two new parameters named "settling rotation angle" and "settling safety ratio" are proposed for the control of general winch system. The physical meanings of the two parameters are explained precisely. Performance specifications for the target winch system are derived by using the proposed two parameters and a controller is designed to meet the performance specifications. Simulation results show that the designed controller gives responses which can be accepted for the target winch system. The concepts of the new design parameters proposed in this paper can be applied to any kind of servo-controlled winch systems.