• Proceedings of the KIEE Conference
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• 1991.07a
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• pp.837-840
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• 1991

This paper describes an implementation of road network extraction algorithms for satellite images. We propose a new road network extraction algorithm which uses magnitude and direction information of edges. The results of applying the proposed algorithm to satellite images are presented and compared with those of other algorithms.

• Proceedings of the KIEE Conference
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• 2006.10d
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• pp.143-145
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• 2006

This paper presents an overall control algorithm for a grid-connected wind-power generation system using a DFIG(doubly-fed induction generator) fed by back-to-back PWM converters. The control of DFIG is based on a stator-flux oriented vector control. The system enables not only fast and smooth synchronization but also high performance regulation of active and reactive power. Experimental results shows The feasibility of the control algorithm.

• Proceedings of the KIEE Conference
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• 2006.10d
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• pp.163-165
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• 2006

This paper presents a implementation of speed sensorless vector control algorithm of induction motor using MATLAB/SIMULINK amd dSPACE DSl104 R&D board. The estimation of rotor flux linkage and rotor speed is carried out using model reference adaptive system(MRAS) method. Estimated rotor speed is used to speed controller of induction motor. Simulation results are presented to confirm speed sensorless vector control algorithm.

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.06c
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• pp.347-350
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• 1998

최근 개인 휴대통신과 컴퓨터 기술의 발달로 유용한 데이터의 질적.양적 향상을 가져왔다. 이로 인해 저장중이거나 선로상에서의 전송중인 정보의 보호문제가 중요시되고 있다. 이러한 정보보호 문제가 중요시됨에 따라 정보보호를 위한 직접적인 암호화 방법중의 하나인 IDEA(International Data Encryption Algorithm)의 구현을 제안하고자 한다. IDEA는 블록 암호화 방식의 하나로서 64비트 데이터를 암호화하기 위해 128비트의 키를 사용한다. 본 논문에서 암호알고리즘 구현을 위하여 하드웨어 설계언어인 VHDL을 사용하였고, V-System을 이용하여 Simulation을 수행하였다. Coding된 알고리즘은 Synopsy를 사용하여 자동합성하였고, Xilinx사의 FPGA-4025를 Target으로 구현하였다.

• Journal of Biomedical Engineering Research
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• v.7 no.2
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• pp.151-158
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• 1986

In this paper, the design and implementation of a microcomputer-based measuring system for quantitative analysis of oculomotor system are described. An algorithm for microcomputer analysis of electro-oculographicaay recorded horizontal saccadic eye movements is presented. From a brief, 4-min recording session detailed statistical information about saccade amplitude, duration, and velocity can be obtained.

• Communications for Statistical Applications and Methods
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• v.10 no.3
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• pp.795-804
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• 2003

In this article, a tomography for the estimation of the origin-destination(OD) traffic intensities in dynamic routing network is considered. Vardi(1996)'s approach based on fixed route is not directly applicable to dynamic routing protocols, which arises from the fact that we cannot access the route at every observation time. While it uses link-wise traffics as the observations, the proposed method considers the triple of ingress/outgress/relayed traffics data at each node so that we can transform the problem into a routing-independent tomography. An EM algorithm for implementation and some simulated experiments are provided.

• Journal of Power Electronics
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• v.10 no.3
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• pp.300-305
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• 2010

This paper presents a two Hall sensor method for rotor angle detection in permanent magnet synchronous motors (PMSM). To minimize the implementation complexity, the system is designed to measure the edge field of permanent magnet pieces. However, there are nonlinearities in the measured values of the edge field. In this work, an angle correction algorithm is proposed, and the improvements in accuracy are verified through experiments. Finally, a field orientation controller is constructed with the proposed angle detection algorithm.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.621-622
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• 2008

When exchanging user data between nodes in a hierarchical conference system using the endpoint mixing scheme, the hierarchical structure may cause extra delay. The algorithm[1] was proposed for minimizing the media delay between the number of the neighboring nodes. In this paper, we implement a hierarchical conference with SIP protocol based on the algorithm.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.167.5-167
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• 2001

Single point attitude determination method provides an optimal attitude minimizing the Wahba loss function. However, for the insufficient number of measurement vectors, the conventional single point methods has no unique solution. Thus, we introduce the sequential method to and an optimal attitude minimizing the windowed loss function. In this paper, this function is de ned as the sum of square errors for all measurement vectors within the axed sliding window. For simple implementation, the proposed algorithm is rewritten as a recursive form. Moreover, the covariance matrix is derived and expressed as a recursive form. Finally, we apply this algorithm to the attitude determination system with three LOS measurement sensors.

• Proceedings of the IEEK Conference
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• 2003.11a
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• pp.377-380
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• 2003

A new color image segmentation scheme is presented in this paper. The proposed algorithm consists of image simplification, region labeling and color clustering. The vector-valued diffusion process is performed in the perceptually uniform LUV color space. We present a discrete 3-D diffusion model for easy implementation. The statistical characteristics of each labeled region are employed to estimate the number of total clusters and agglomerative hierarchical clustering is performed with the estimated number of clusters. Since the proposed clustering algorithm counts each region as a unit, it does not generate oversegmentation along region boundaries.