• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.392-395
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• 2003

In the maritime container terminal, LMTT (Linear Motor-based Transfer Technology) is horizontal transfer system for the yard automation, which has 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., LMCPS (Linear Motor Conveyance Positioning System) is considered as that the system is changed its model suddenly and variously. In this paper, we will introduce the soft-computing method of a multi-step prediction control for LMCPS 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, cogging force, force ripple, and sudden changes of itself.

• Journal of Advanced Marine Engineering and Technology
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• 제36권5호
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• pp.700-706
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• 2012

이동식발전설비에서 시동장치의 핵심기술은 피니언기어 쉬프팅 장치와 초기 기동전압을 제한하는 것이며 기존의 제품에서는 기계적 주접점을 이용한 시동 제어장치를 사용하고 있다. 하지만 완전한 피니언기어 쉬프팅 후 시동전동기의 기동의 불확실성이나 대전류에 의한 주접점의 아크손상 등의 큰 문제점을 가지고 있다. 본 연구에서는 이러한 문제점을 해결하기 위해 기동의 불확실성 제거를 위한 피니언기어 쉬프팅 제어회로, 대전류에 의한 접점의 아크손상 방지를 위해 반도체 소자를 이용한 시동 제어시스템, 직권전동기의 소프트 스타팅을 위한 기동 안전장치 등을 새롭게 설계, 제작하여 안전성과 신뢰성을 얻고자 하였다. 또한, 피니언기어 제어회로와 전동기 전원회로를 분리하여 전기적 안전성을 확보하였다.

• 로봇학회논문지
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• 제19권1호
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• pp.39-44
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• 2024

This study introduces a novel method for predicting the shape of soft catheter robots embedded with electromagnets. As an advancement in the realm of soft robotics, these catheter robots are crafted from flexible and pliable materials, ensuring enhanced safety and adaptability during interactions with human tissues. Given the pivotal role of catheters in minimally invasive surgeries (MIS), our design stands out by facilitating active control over the orientation and intensity of the inbuilt electromagnets. This ensures precise targeting and manipulation of the catheter segments. The research encompasses a comprehensive breakdown of the magnetic modeling, tracking algorithms, experimental layout, and analytical techniques. Both simulation and experimental results validate the efficacy of our method, underscoring its potential to augment accuracy in MIS and revolutionize healthcare-oriented soft robotics.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2003년도 ISIS 2003
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• pp.307-310
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• 2003

In the maritime container terminal, LMTT(Linear Motor-based Transfer Technology) is horizontal transfer system for the yard automation, which has 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., LMCPS (Linear Motor Conveyance Positioning System) is considered as that the system is changed its model suddenly and variously. In this paper, we will introduce the soft-computing method of a multi-step prediction control for LMCPS 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, cogging force, force ripple, and sudden changes of itself.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 F
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• pp.1971-1973
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• 1997

Space Vector control of linear induction motor without speed sensor is one of the most up-to-date researching subjects to the engineers in the fields of power electronics and control theory. A conveyance SLIM (Single-sided Linear Induction Motor) has required a stable speed and a soft start/stop when the goods convey. So, the close loop control method to use a speed sensor have been adopted and as the speed sensor, a linear encorder has been used. But when the speed sensor used, the application boundary is limited and the confidence of system is diminished because it is sensitive to external environment variations and its cost is very expensive. So, to solve these problems, this paper deals with speed control of the conveyance SLIM using space vector without speed sensorless.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제51권8호
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• pp.467-474
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• 2002

In this paper, a wind power simulator is designed and implemented. To realize the torque of wind blade, a DC motor is used as a variable torque input device. An induction machine is used as a generator of which speed is controlled to maintain the optimal tip speed ratio during wind speed change. Input torque of system is controlled by armature current of DC motor and speed is controlled by generator control unit using field oriented control algorithm. Various control algorithms such as MPPT, soft start up, the simulator reactive power control, can be developed and tested using the simulator.

• 전기전자학회논문지
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• 제22권2호
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• pp.258-265
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• 2018

본 논문은 단상 유도전동기의 기동 시 발생하는 기동전류를 분석하고 이를 저감하기 위한 알고리즘을 제안한다. 일반적으로 단상 유도전동기는 구조적인 특성으로 인해 기동토크를 발생시킬 수 있는 별도의 기동장치가 요구된다. 본 논문에서 사용되고 있는 방법은 커패시터-기동/커패시터-운전 방식이며 타 방식 대비 기동토크가 크고 운전효율이 높은 특성이 있다. 하지만 초기 기동 시 약 5~6배에 해당되는 돌입전류가 발생하며 이로 인한 초저온 냉동고 기동 소자와 주변기기들의 소손 및 수명 저하의 원인이 된다. 기동 시 발생하는 돌입전류를 저감하기 위하여 가상 dq모델 기반의 전류제어 알고리즘을 적용하여 기동 전류를 제한하고, 정격운전에 도달 시 상용전원과 동일한 운전조건으로 전환하기 위한 알고리즘을 실험을 통하여 그 타당성을 검증한다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1997년도 전력전자학술대회 논문집
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• pp.166-170
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• 1997

A Single phase induction motor is the predominant fractional horsepower power rated, extensively used in domestic and industrial application. For example, these motors provide the motive power to washing machines, fans, refrigerators, etc. In this paper, single phase induction motor input current was detected by a small current transformer and determined TRIAC gate signal by using op-amp analog circuit. The soft-start strategy is based on limited auxiliary current angle during starting period in the closed-loop control. The Simulation and experimental result show the motor's starting characteristics of the proposal starting system and are compared with centrifugal switch starting motor.

• Journal of Welding and Joining
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• 제24권6호
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• pp.13-20
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• 2006

Resistance spot welding is widely used for joining sheet metals in the automotive manufacturing process. Recently, servo-gun is used to increase the productivity and precise control the acting force. However, force control mechanisms have not been investigated with servo-guns until now. In this paper, it is proved that servo-motor current is proportional to torque and by experiment, experimental equation between servo-motor current and electrode force was derived. Algorithm for feedback control of electrode force was suggested using current measurement. In addition, applying soft touch method to this system the impact between electrode and specimen, which is the problem of air gun, could be reduced. Indentation made the force decrease in holding time of resistance spot welding. In order to overcome this problem, force compensation using the servo gun was used and it improved weld strength in good welding current range.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.1676_1677
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• 2009

This paper uses the softstarter function of the inverter in the place of business where the flow control is possible, multi maneuver method as the application (with 1 inverter various pump maneuver/standstill which is soft) box the plan which prevents the small hand of the equipment which is caused by maneuver electric current presented.