• Proceedings of the Korean Society for Agricultural Machinery Conference
• /
• 1999.12a
• /
• pp.122-129
• /
• 1999

• Proceedings of the Korean Society for Agricultural Machinery Conference
• /
• 1999.12a
• /
• pp.115-121
• /
• 1999

• Proceedings of the Korean Society for Agricultural Machinery Conference
• /
• 1998.12a
• /
• pp.29-35
• /
• 1998

• Proceedings of the Korean Society of Dyers and Finishers Conference
• /
• 2005.05a
• /
• pp.184-186
• /
• 2005

• The Journal of the Acoustical Society of Korea
• /
• v.20 no.4
• /
• pp.12-16
• /
• 2001

To analyze the performance of array shape estimation techniques using auxiliary sensors, the appropriate number and the positions of auxiliary sensors are investigated. Also, a post-processing technique based on spline interpolation is proposed to improve the performance of array shape estimation. The simulation results showed that when auxiliary sensors are arranged uniformly, the performance of shape estimation is better than other arrangements of auxiliary sensors. Also, the proposed post-processing technique improved the performance of the existing shape estimation method, such as Kalman filter method.

• The Journal of the Acoustical Society of Korea
• /
• v.15 no.4
• /
• pp.93-97
• /
• 1996

The Total Least Squares(TLS) method is an unbiased estimator for solving overdetermined sets of linear equations Ax${\simeq}$b when errors occur in all data. However, as well as Least Squares(LS) method it doesn't show robustness while the errors have a heavy tailed probability density function. In this paper we proposed a robust method of TLS (Robust TLS, ROTLS) based on the characteristics of TLS solution. And the ROTLS is verified by applying it to system identification problems.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2007.04a
• /
• pp.364-366
• /
• 2007

본 논문은 철도차량이 주행하는 선로에 존재하는 수많은 곡선과 경사, 속도 제한 조건 때문에 열차성능해석 계산시 열차의 견인, 제동 특성이 비선형이기 때문에 해석적인 방법으로 해를 구하는데 어려움이 많은 경제운전 문제를 운행 시간 여유분을 고려하여 에너지 소비를 최소화하는 운전 모형을 제시한다. 경제운전모형을 한국형 고속열차에 적용하여 그 타당성을 입증하였다.

• Proceedings of the Korean Society for Agricultural Machinery Conference
• /
• v.10 no.2
• /
• pp.80-88
• /
• 2005

• Proceedings of the IEEK Conference
• /
• 1999.06a
• /
• pp.691-694
• /
• 1999

This paper presents a performance improvement technique of 2-D towed array shape estimation using Kalman filters. The proposed algorithm by linear model approximation corrects the position errors caused by the Kalman filter results. However, since the assumed linear model makes errors at bending parts, the spline interpolation algorithm based on curve is proposed to reduce the errors.

• Proceedings of the KSR Conference
• /
• 2003.10a
• /
• pp.216-223
• /
• 2003

In this paper, we introduce the software and hardware of the measuring system for performances of traction and braking in KTX(Korea Train eXpress). The measuring system focuses on the verification of the performance and acquisition of test data. The software controls the hardware of the measuring system, performs the analysis and calculation of measurement data and acts as interface between users and the hardware. For this purpose, three programs, such as a measuring program, a back-up program and a post-processing program, have developed.