• Proceedings of the KIPE Conference
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• 2004.07b
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• pp.655-659
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• 2004

This paper proposes a fuzzy logic based vector control for the gearless traction machine drive systems using a permanent-magnet synchronous motor (PMSM). The performance of the proposed Fuzzy Logic Control(FLC)-based PMSM drive are investigated and compared to those obtained from the conventional PI controll-based drive system. We have confirmed theoretically and experimentally at different dynamic operating conditions such as step change in command speed, step change in load, etc. The comparative experimental results show that the FLC is more robust and, hence, found to be a suitable replacement of the conventional Pl controller for the high-performance elevator drive system.

• Journal of Information Technology and Architecture
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• v.10 no.2
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• pp.273-281
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• 2013

Smart work can classify three types. First, mobile office equipped with a portable computer and connect to the company servers and Intranet via mobile phones. Second, home working using video conference system. Third, smart work center. Smart work has enabled us to work efficiently, to work anytime and to work anywhere, beyond conventional office working. This paper presents development processes of a smart work for After Service Business, especially, for the elevator industry. we called implemented mobile office system "A/S work". A/S work using mobile devices has some advantages as compared with previous system. 1) Before/After photo management function 2) Assessment process of customer satisfaction 3) The work history management app. 4) The inquiry and confirmation function to current status of all workers 5) The group SMS function sending selected workers. 'M' elevator company has used A/S work as efficient smart work system.

• Journal of Sensor Science and Technology
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• v.10 no.1
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• pp.33-41
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• 2001

Wire ropes have been widely used in industrial applications, wherever heavy weight should be carried safely or mechanical energy should be transmitted fast. Especially, wire rope failures in operating elevator may lead to extensive property damage and serious injury to nearby personnel. Hence, it is very important to inspect wire rope periodically. Failure defection of wire rope requires fundamental knowledge of wire rope construction, rope behavior, properties of fault, sensing and signal processing method. In this research, the development of a new fault detecting system incorporating Hall-effect sensors to detect flaws such as abrasion, broken wire, corrosion and deformation for aged wire ropes in elevator, is described. For using a detector as a portable instrument, several performances for implementing sensing part with Hall-effect sensor, analog signal processing unit and programs are described. Experiments and field testing results for the implemented detecting system are also given. As a result, it is verified that the detecting system has good efficiency for inspecting faults of aged wire ropes in service.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• v.5B no.2
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• pp.137-141
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• 2005

A transverse flux, PM-exited linear motor (TFM-LM) with inner mover was designed and built. Its output power density is higher and its weight is lower than those of the conventional PM exited linear synchronous motors (PM LSM). To obtain the maximum thrust force under the given volume, the thrust force density with respect to the ratio of the slot width and the length of pole pitch is analyzed by the 3-dimension finite element method (FEM). Finally, calculated static thrust forces was compared with the experimental values. The calculated and measured performance of the transverse flux, PM-exited linear motor with inner mover revealed great potential for system improvements by reducing the mass of the linear motor. For examples, when this motor was applied to a ropeless elevator, it was possible to increase the power density by more than 400% over the conventional PM-LSM. The results of this study recommend this type of motor for the ropeless elevator or gearless direct linear driving system.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.569-570
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• 2011

In this paper, position control method using improved sliding mode controller for SPMSM in elevator system is proposed. Since the improved sliding mode controller has a feature following prescribed sliding trajectory, it is robust in parameter fluctuation and able to minimize the over shoot. The controller is judged sutiable for the drive system of elevators on the basis of PSIM simulations.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.624-627
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• 1996

To provide pleasant building environment and the ease of maintenance and facility management, many new office buildings are being built as intelligent buildings. Building control systems which are employed in intelligent buildings require advanced types of controllers and varieties of control schemes. Designing and installation of these types of advanced building control systems take a lot of effort and also they are costly. In order to design these systems, it is necessary for the designers to have means to analyze and estimate the performance of control systems. The simulator which is presented in this paper is composed of three parts, HVAC simulation module, elevator simulation module, and evacuation modeling module for the outbreak of fire or similar disasters. In this paper, the functions and modelling method for each module are explained and simulation results are presented.

• Proceedings of the Korean Society of Computer Information Conference
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• 2010.07a
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• pp.209-212
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• 2010

전통산업의 고도화를 위한 노력으로 IT융합이 다양한 분야로 확대되고 있다. 특히 무선네트워크 및 센서기술의 발달, 스마트폰과 같은 지능화된 단말기의 보급은 정보의 활용성을 높이고 산업 전반으로 확대되고 있다. 엘리베이터 시스템 역시 다양한 분야로의 진화를 추구하고 있으며, 사용자의 요구를 수용하고자하는 노력으로 기존 기계적인 환경에 다변화된 접근방식과 정보전달을 제공함으로써 엘리베이터가 삶의 새로운 중심 모델로 자리 잡고 있다. 이에 본 논문에서는 보다 향상된 사용자 접근 제어를 제공하기 위해 기존 엘리베이터 시스템을 확장한 IT환경기반의 엘리베이터 제어시스템을 구축하고 스마트 모바일 시스템과 결합한 제어 모델을 제시한다. 이를 통해 사용자의 직접적인 엘리베이터 접근을 포함한 무선 환경의 보다 효율적인 원격 접근 방식을 제공함으로써 사용자의 편이성 및 장애인들의 접근성 향상에 도움을 제공할 수 있을 것이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.887-888
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• 2013

본 논문에서는 엘리베이터에서 발생할 수 있는 다양한 고장 요소들을 실시간으로 진단하고 일정시간 이상 운행이 정지된 경우 고장으로 판단하여 운행상태를 CAN 통신을 이용하여 원격으로 모니터링이 가능한 시스템을 설계하였다. 엘리베이터 내의 승객 탑승여부 확인, 현재 운행위치, 주요 고장내용을 실시간으로 진단하고 CAN 메시지를 이용 메인 컨트롤러에 송신하고 엔지니어는 서버기반의 어플리케이션을 통해 확인이 가능하도록 하였다. 또한 자동차, 선박 등 전장분야에 적용되고 있는 CAN 프로토콜을 이용하여 통신의 신뢰성을 확보하고 엘리베이터 관련 운행 및 고장 상태 등을 실시간을 파악할 수 있도록 하여 효율적인 엘리베이터 유지보수를 가능하도록 하였다. 설계된 시스템의 성능평가는 시뮬레이션 및 프로토콜 모니터링을 통해 수행하였다.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.50 no.10
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• pp.486-493
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• 2001

Acrophobia is an abnormal fear of heights. Medications or cognitive-behavior methods have been mainly used as a treatment. Lately the virtual reality technology has been applied to that kind of anxiety disorders. A virtual environment provides patient with stimuli which arouses phobia, and exposing to that environment makes him having ability to over come the fear. In this study, the elevator stimulator that composed with a position sensor, head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a feel of phobia and without phobia, heart rate was measured during experiment. And also measured a person's HR after the virtual reality training and in a real building elevator. In this study, we demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.

• International Journal of High-Rise Buildings
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• v.8 no.3
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• pp.185-192
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• 2019

Citic Tower is the first over-500 m-tall super highrise building in the world, located in the high seismic intensity area with paek ground acceleration over 0.2g in 475 years. This project is unique in its complexity, large volume, and challenging site conditions (zero site for construction). The traditional techniques can hardly meet safty, quality and schedule requirements of the construction. This article introduces the key construction technologies that are innovatively developed and applied in Citic Tower project construction, including intelligent super-high-rise building integrated construction platform system, independently developed by the CCTEB; Jump-Lift Elevator, which is the first of the kind with service height over 500 meters; combined temporary-and-permanent fire protection systems. The BIM technology is also applied in this project. Through technical innovation, and utilization of technologies, construction speed and safety had been greatly improved.