• Journal of Navigation and Port Research
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• v.28 no.6
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• pp.541-548
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• 2004

In the maritime container terminal. LMCTS (Linear Motor-based Container Transfer System) is horizontal transfer system for the yard automation, which In., been proposed to take the place of AGV (Automated Guided Vehicle). The system is based on PMLSM (Permanent Magnetic Linear Synchronous Motor) that is consists of stator modules on the rail and shuttle car (mover). Because of large variant of mover's weight by loading and unloading containers, the difference of each characteristic of stator modules, and a stator module's trouble etc. LMCTS is considered as that the system is changed its model suddenly and variously. In this paper, we will introduce the softcomputing method of a multi-step prediction control for LMCTS using DR- FNN (Dynamically-constructed Recurrent Fuzzy Neural Network). The proposed control system is used two networks for multi step prediction Consequently, the system has an ability to adapt for external disturbance, detent force, force ripple, and sudden changes by loading and unloading the container.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.96-102
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• 2008

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.1
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• pp.33-38
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• 2013

The general purposed control system for driving a motion of many different typed robot end-effector, which consists of a controller based on ARM Cotex M3-11017 MCU and an application software for generating a motion of end-effector, was developed. Experimental results show that a positioning error is nearly negligible and a repeatability error is 0.04%. Accordingly the developed control system can be applied practically to actuate a robot end-effector for inspection and maintenance of steam generator heat pipe in nuclear power plant.

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.120-121
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• 2014

장거리 이송이 가능한 선형동기 전동기 구조를 제안하고, 수학적 모델링을 하였으며, PI제어기를 포함하는 제어알고리즘을 제안하여, 실험으로 그 결과를 확인하였다. 추진제어기의 출력은 Park's, Clake's Transformation을 이용하여 코일을 구동하는 전류 명령을 발생시켰으며 개별 코일을 독립적으로 구동하는 아날로그 전류제어기를 OP-Amp로 구현하였다. 실험결과는 속도 오차는 4 ~ 10% 이하의 결과를 얻었다.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.1045-1046
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• 2006

최근 반도체 및 FPD 산업에서 Glass의 사이즈, 무게의 증가함에 따라 물류 이송 장비의 전원장치인 비접촉 전원장치의 크기와 용량이 증가하는 추세이며, 또한, 클린룸의 규모가 커짐에 따라 물류 이송 장비 시스템의 길이가 길어지고 Vehicle의 수가 증가하는 추세이다. 본 논문에서는 여러 대의 Vehicle간 독립제어가 가능하고, 물류 이송 장비의 구조가 직선부분과 곡선부분이 혼용되어진 구조에서도 사용 가능한 정전류 비접촉 전원장치의 주요 전력변환 토플로지 별 해로해석, 제어방법을 제시하였고 특히 직 병렬 공진 컨버터의 회로해석, 특성평가를 행하였다. 이 특성평가를 바탕으로 정전류 비접촉 전원장치의 시제품을 제작하여 저항성 부하와 선형 구동 시스템에 적용한 Vehicle 2대를 부하로 사용하여 실험을 행하여 실제 적용, 가능함을 보이고자 한다.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.5
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• pp.837-844
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• 2017

The weir to regulate water level in a tide generation tank is above and below carried by two electric cylinders which are mounted on right and left of weir itself. In this case, a movement difference between right and left cylinder causes unbalance of weir and friction between weir and guide. And then, the weir will not be sent to target point. In this study, a synchronous control system is developed to take accurate and quick equilibrium of the weir. The control system based on cross coupled structure consists of two I-PD controllers and a lead compensator. Each of the I-PD controllers is designed in order that the electric cylinder may exactly follow the reference signal without overshoot and input saturation. And the lead compensator is designed to achieve stable and accurate synchronization. Finally, the simulation result shows that the designed synchronous control system is effective for elimination of synchronous error.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1999.06a
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• pp.111-114
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• 1999

습도 제어가 안전관련분야에서 점차 그 비중이 증가하여 안전방재용 습도센서로 금수성 물질 및 기타 위험물의 저장, 핵발전소의 반응기, 고압보일러, LPG 이송 및 저장, 화학 plant 등의 습도제어 분야에 사용되고 있으며 이 외에도 섬유, 식품, 전자 등의 산업분야에서 안전 범위내의 습도 유지 및 검출을 목적으로 널리 사용된다. (중략)

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.04a
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• pp.641-645
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• 1996

Ball screws are used in the feeding system for transmission of driving force. The friction effect between bed and table, which can affect in accuracyin one dimension feeding and describe the dynamic feeding error, could be simplified as a specific model through experiments. The experiments for dynamic feeding errors were performed om tje NC lathe eith a ball screw. The errors in feeding were measured with respect to the variances of feed, spindle speed and motor current for feeding. A rotary encoder and a current sensor were installed with NC lathe.

• Proceedings of the KIEE Conference
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• 2008.10c
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• pp.99-101
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• 2008

본 논문에서는 자기부상방식의 이송장치의 부상 및 안내력을 발생시키는 주 전자석의 자기력 특성해석에 관해 연구하였다. 부상용 전자석의 자기력 특성을 해석하기 위해서 이론적 해석 방법에 의한 등가 자기 부상 모델을 제시하였으며, 제어 변수에 따른 특성을 고찰하기 위해서는 시뮬레이션값과 유한요소법예 의한 계산값과 비교, 분석하였다.

• Journal of the Korean Society for Precision Engineering
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• v.15 no.7
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• pp.104-118
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• 1998

In this paper, the motion of ballscrew and shape of workpiece are the main objective variables varying with load conditions. To verify feed mechanism in NC lathe, the monitoring system is designed and cutting condition variables are spindle speed depth of cut and feed. During machining, rotation number of ballscrew motion of ballscrew in direction to gravity center and cutting force are measured. After machining, the roughness of workpiece is measured.