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P-PI 직렬 제어기의 응답 개선을 위해 가속도 보상을 이용한 제어 알고리즘
손영득(Yung-Deug Son),김형진(Hyeong-Jin Kim),김장목(Jang-Mok Kim) 한국조명·전기설비학회 2020 조명·전기설비학회논문지 Vol.34 No.2
This paper analyzes the considerations for the design of the position controller that is controlled at the low frequency. The P-PI controller is mainly used to control the motor position. The controller has the limited bandwidth and control performance is degraded when controlled at the low frequency. Therefore, there is need for the position controller that can improve the position control performance at the low control bandwidth. To follow the fast position response without overshoot in the low control frequency, the paper proposes a new position control algorithm that compensates through the relation between the position controller and the reference speed. The proposed algorithm is verified through simulation results.
손영득(Yung-Deug Son),소건백(Gun-Baek So),진강규(Gang-Gyoo Jin) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.1
Maintaining stable tension of mooring winch ropes on-board a ship under waves, tides and draft change is very important for the safety of the ship. Hydraulic mooring winches, used for pulling or hauling ropes, are in general highly nonlinear and time varying systems due to the compressibility and varying viscosity of the fluid, oil leakage and disturbances from the load. This paper presents a design method of a nonlinear PID (NPID) controller, combining the linear PD actions and nonlinear I action, for constant rope tension control of a hydraulic mooring winch. The gain of the I term is continuously changed according to the error during the operation for achieving good control effort under the changing external environment and implemented by Takagi-Sugeno type fuzzy rules. The NPID controller parameters are tuned by a genetic algorithm (GA). Effectiveness of the proposed method is verified through a set of simulation works.
손영득(Yung-Deug Son),소건백(Gun-Baek So),신석신(Seok-Sin Shin),진강규(Gang-Gyoo Jin) 제어로봇시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.7
In this paper, we address the preliminary design considerations to develop a motor-operated valve (MOV) actuator. Both a lead compensator (LC) and a linear proportional-derivative (PD) controller are considered as a tool for controlling the opening and closing of a valve. The LC is designed using the frequency response characteristics to satisfy the given design specifications. The PD controller with a first-order filter in the denominator is optimally tuned so that a genetic algorithm (GA) minimizes an objective function. There is nonlinear saturation in the valve due to its physical structure and the signals applied to the motor are limited. To assess the stability of the overall feedback system when one of the designed controllers is used in operations in a nonlinear section, this study applies Popov’s stability criterion. Simulation works are performed to validate the effectiveness of the proposed methods.
배터리 충전을 위한 소형풍력 발전 시스템의 병렬 운전방안에 관한 연구
손영득(Yung-Deug Son),구현근(Hyun-Keun Ku),김장목(Jang-Mok Kim) 전력전자학회 2014 전력전자학회 논문지 Vol.19 No.6
This study proposes a parallel operation strategy for small wind turbine systems. A small wind turbine system consists of blade, permanent magnet synchronous generator, three-phase diode rectifier, DC/DC buck converter, and the battery load. This configuration has reliability, simple control algorithm, high efficiency, and low cost. In spite of these advantages, the system stops when unexpected failures occur. Possible failures can be divided into mechanical and electrical parts. The proposed strategy focuses on the failure of electrical parts, which is verified by numerical analysis through equivalent circuit and acquired general formula of small wind power generation systems. Simulation and experimental results prove its efficiency and usefulness.
디지털 트윈 기술로 협동 로봇의 고장 또는 결합 원인을 효율적으로 파악하는 시스템에 대한 연구
손효기(Hyo-Gi Son),손영득(Yung-Deug Son) 한국산업기술융합학회(구. 산업기술교육훈련학회) 2024 산업기술연구논문지 (JITR) Vol.29 No.1
본 논문에서는 4차 산업혁명 이후로 제조 현장에서 사람과 로봇이 공존하는 시대가 되면서 산업현장에서 협동 로봇을 사용하는 사례가 증가하였다. 이에 따라서 생기는 문제점으로는 원인 파악이 어려운 로봇의 다양한 충돌이 있다. 효율적인 생산과 현장에서 발생하는 로봇 충돌의 원인과 방지를 위해서 데이터의 동기화와 생성되는 데이터를 처리하기 위한 플랫폼이 필요하다. 본 논문에서는 협동 로봇과 제어 설비의 고장 또는 결함 등 원인 파악에 대한 시스템으로 데이터를 처리하는데 보다 쉽고 편리하게 가공하고 분석하여 사용자가 빠르게 원인을 파악하기 위해서이 플랫폼을 제안하고 이를 이용한 분석 결과를 제시하고자 한다. 제시한 플랫폼은 국내 중소기업 생산 제조업체, 스마트팩토리 교육의 장비를 원격지에서도 데이터를 이용하여 가상 공간으로 구동해 볼 수 있으므로 현 제조업에 대한 커뮤니케이션 및 원격 기술 지원을 할 수 있어서 효과적이다. As the coexistence of humans and robots has increased since the start of the Fourth Industrial Revolution, this study proposes a platform for processing and analyzing data to efficiently address the causes and prevention of robot collisions at industrial sites. The platform facilitates easy and convenient data processing and analysis, allowing users to quickly identify the causes of collisions between collaborative robots as well as control equipment failures or defects. Utilizing data, the platform also enables the remote operation of equipment in virtual spaces, making it effective for communication and remote technical support in the manufacturing industry.
[학술강연] RCGA에 기초한 태양전지 모델의 파라미터 추정
손영득(Yung-Deug Son),권봉재(Bong-Jae Kwon),신명호(Myung-Ho Shin),진강규(Gang-Gyoo Jin) 한국마린엔지니어링학회 2002 한국마린엔지니어링학회 학술대회 논문집 Vol.2002 No.-
In this paper, we presents an online scheme for parameter estimation of solar cell, based on the model adjustment technique and a real-coded genetic algorithm(RCGA). The ideal diode model and the diode model with series and shunt resistors are used to estimate their parameters. Simulation works using field data in the form of a V - I characteristic curve are carried out to demonstrate the effectiveness of the proposed method