• Korean Journal of Computational Design and Engineering
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• v.5 no.1
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• pp.33-41
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• 2000

A monitoring and control system, as a broker to connect work-fields with higher departs, gives a great effect on capacity and reliability of a manufacturing system. However, it is very difficult to construct an integrated monitoring control system in a shop with diverse equipment. This paper proposes a CORBA based scheme to construct an integrated system for monitoring and control of equipment in a machining shop. The system is developed by applying the object oriented technology. Thus, its design and maintenance are not only early but it can cope with variation of production situation flexibly. Finally, we introduce a prototype using a milling machine, a robot, PLC's, etc.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.1014-1019
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• 2009

The optimal control system for heat source and HVAC system has been developed for minimizing energy consumption while maintaining the comfort of indoor thermal environment in terms of the environmental variables such as time varying indoor load and outdoor temperatures. The optimal set-points of control parameters are supply air temperature and chilled or hot water temperatures. The optimal control study has been implemented for biosafety laboratory by using TRNSYS simulation program in order to investigate energy performance for heat source and HVAC system.

• Journal of the Korean Society for Precision Engineering
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• v.16 no.4 s.97
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• pp.85-94
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• 1999

Reconfiguration, expansion, or new establishment of FMS requires the availability of a shop floor control (SFC) system relevant to the FMS since it is closely related with the hardware component of FMS. Due to the expensive cost of its development, significant research efforts have been made to develop an SFC system that is reusable. This paper presents Abstract Machine Tool (AMT) approach applied to develop an SFC sytem that is reusable without additional programming. The AMT model enables us to design the SFC system independently of the hardware-dependent attributes of euqipment; an AMT models a workstation by abstraction and presents an equipment-independent interface to machining cell controller. Specifically, we describe how we formalize the interfaces among equipment in order to build an AMT and how we design the machining cell control software based on AMT models. We also present MACHINIST the machining cell control system for IAE-FMS plant as an implementation example.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.28 no.11
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• pp.1637-1645
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• 2004

In remote control of telerobotics equipment, the real-time visual feedback is necessary in order to facilitate real-time control. Because of the network congestion and the associated delays, the real-time image feedback is generally difficult in the public networks like internet. If the remote user is not able to receive the image feedback within a certain time, the work performance may tend to decrease, and it makes difficulties to control of the telerobotics equipment. In this paper, we propose an improved visual feedback scheme over the internet for telerobotics system. The size of a remote site image and its quality are adjusted for efficient transmission. The constructed system has a better real-time update characteristics, and shows a potential for the real-time visual control of the telerobotics system.

• International Journal of Fluid Machinery and Systems
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• v.9 no.1
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• pp.28-38
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• 2016

The flexible control system for hydraulic pile hammer using main control valve is present to the requirement of rapidly reversing with high frequency. To ensure the working reliability of hydraulic pile hammer, the reversing performance of the main control valve should commutate robustness to various interfere factors. Through simulation model built in Simulink/Stateflow and experiment, the effects of relative parameters to reverse performance of main control are analyzed and the main interfere factors for reversing performance are acquired. Treating reverse required time as design objects, some structure parameters as control factors, control pressure, input flow and gaps between spool and valve body as interfere factors, the robust design of the main control valve is done. The combination of factors with the strongest anti-jamming capability is acquired which ensured the reliability and anti-jamming capability of the main control valve. It also provides guidance on design and application of the main control valve used in large flow control with interferes.

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.1356-1359
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• 1997

There are various methods to detect the faulty electric facilities(esp, insulator) indirectly on power distribution lines at a certain distance apart. This paper describes the proto type equipment to detect a faulty insulator by receiving a electric discharge noises, which are generated with a periodicity of 120Hz.

• 제어로봇시스템학회:학술대회논문집
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• 1986.10a
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• pp.387-392
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• 1986

DC motor is excellent in controllability and efficiency, but vulnerable in maintenance with respect to AC motor owing to the development of power devices and microelectronics, excellent AC motor drives which have characteristics as similar as DC motor's have been developed. Thyristor motor equipment that has an important role with Inverter in the field of AC motor drives was developed in the late 1960. There was no research about thyristor motor in Korea, then thyristor motor equipment was all imported. By this we started to develop in 1983, was tested in 1984, 1985. Now we express ourselves about thyristor motor equipment development procedure and characteristics.

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.139-139
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• 2007

• Proceedings of the SAREK Conference
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• 2004.06a
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• pp.143-143
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• 2004

• Proceedings of the IEEK Conference
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• 2002.06a
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• pp.291-294
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• 2002

This paper proposed interface test method for performance verification of communication and broadcasting satellite between communication and broadcasting satellite payload and EGSE(Electrical Ground Support Equipment). We need ground support equipment for test them to performance verification and conform interface function of payload. This paper define tile telemetry transfer method for control payload using GSE(Ground Support Equipment) and receive telemetry data collected from GSE through bus simulator