• Journal of Bio-Environment Control
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• v.1 no.1
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• pp.1-13
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• 1992

This study was attemped to provide some fundamental data for the safety structural design of biological production facility. Wind speed and snow depth according to recurrence intervals for design load estimation were calculated by frequency analysis using the weather data of 60 stations in Korea. The following results were obtained : 1. Type-I extremal distribution was selected for the probability density function of yearly maximum wind speed and snow depth and result of Chi-square goodness of fit showed highly significance at most regions. 2. Design frequency factors for given number of samples and recurrence intervals were calculated, and also design wind speed and snow depth as shown in Table 5-Table 6 and Fig.3-Fig.4 were derived. 3. About 46.4% of the winds having maximum wind speed at every station was analyzed to be same direction, and the consideration of this fact may improve the structural safety. 4. Considering wind speed and snow depth, protected cultivation is very difficult in Ullungdo and the Youngdong districts, and strong structural design is needed in the Chungnam and Junbuk west seaside against snow depth and the west-south seaside against wind speed in Korea.

• Proceedings of the Korea Society of Design Studies Conference
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• 2000.11a
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• pp.84-85
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• 2000

G7 고속전철개발 산업에서 계획된 부속실은 경부 고속전철(K-TGV)의 부속실을 그대로 사용하는 것으로서 좁은 통로와 획일적 공간, 불필요한 공간에 의한 승객 편의시설의 결여되었기에, 이의 수정보완이 요구되었다. 아래의 사진들은 K-TGV의 부속실 모습이다. (중략)

• Proceedings of the KIEE Conference
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• 1999.07f
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• pp.2758-2760
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• 1999

ASIC chip design for motor control has been a subject of increasing interest since effective system-on-a-chip design methodology was developed. This paper investigates the design and implementation of ASIC chip for speed control of induction motor using VHDL which is a standarded hardware description language. The presented system is implemented using a simple electronic circuit based on FPGA.

• Proceedings of the IEEK Conference
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• 2000.11a
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• pp.275-278
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• 2000

As the operating frequency of digital modules in network system becomes fast, integrity of signals between modules is regarded as a important factor in high speed system design. To guarantee the signal integrity, many factors that deteriorate quality of signal should be considered. In this paper, we survey many factors which be considered while in designing and imp]ementing the backplane for high speed router and analyze the simulation result and experimental result.

• 전기의세계
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• v.24 no.6
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• pp.85-91
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• 1975

A new design method for the SCR-Chopper type speed controller of the battery-powered vehicles was developed. The conventional speed-controllers were either inductance type or contact type using resistance. In the new method, a photocoupler was used in sensing the control currents and a noncontacting type photo-conductive device (CDS) was used in mading acceleration. Experiments using these new devices showed encouraging results.

• Proceedings of the KIEE Conference
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• 2001.07b
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• pp.871-873
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• 2001

The switched reluctance motor (SRM) is gaining much interest as a candidate for electric vehicle for its simple and rugged construction, ability of extremely high-speed operation. This paper is to design and investigate the capabilities of the SRM for low speed electric vehicle (LSEV).

• Proceedings of the KIEE Conference
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• 2001.07b
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• pp.774-776
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• 2001

This paper describes the finite element analysis(FEA) for the design of common core-type and separated core-type rotational speed sensor(RSS) for SMART MCP and compared with the low/ high speed characteristics of prototype RSS. As a result, it is shown that the characteristics of prototype RSS have a good agreement with the results of FEA.

• Journal of the Korean Institute of Navigation
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• v.6 no.1
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• pp.19-39
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• 1982

There may be a lor of studies on the economic design of ship for the most favorable combination of design basis on the owner's request. However, there are few on the economical ship's size and speed for the ship owner's stand point. This paper describes on the optimal ship's size and speed to the given marine commercial environments for the owner's requirement to the shipyard. As the result of the paper, the criterion curve of bulk carrier will also be used to assess existing ships for their profitability.

• 제어로봇시스템학회:학술대회논문집
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• 1989.10a
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• pp.663-668
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• 1989

Control methods to achieve efficient and accurate deburring robots are proposed. For efficiency, cutting speed is controlled adoptively with the cutting load. For accuracy, it adopts repetitive control. Since usual repetitive control cannot afford dynamical speed changes, the proposed method controls in an interpolating manner using several waveforms stored in the controller. Successful experimental results axe shown.

• Proceedings of the IEEK Conference
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• 2000.11b
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• pp.164-167
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• 2000

This paper introduces the design of high-speed analog-to-digital converter for hard disk drive (HDD) read channel. This is based on autozero technique for low-error rate, and Double Speed Dual ADC(DSDA) technique lot efficiently increasing the conversion speed of A/D converter. This An is designed by 6bit resolution, 800M sample/s maximum conversion rate, 390㎽ power dissipation, one clock cycle latency in 0.65 $\mu\textrm{m}$ CMOS technology.