http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
서태일,조명우 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.4
The main goal of our research is to compensate the milled surface errors induced by the tool deflection effects, which occur during the milling process. First, we predict cutting forces and tool deflection amount. Based on predicted deflection effects, we model milled surface shapes. We present a compensation methodology, which can generate a new tool trajecto-ry, which is determined so as to compensate the milled surface errors. By considering manufacturing tolerance, tool path compensation is generalized. To validate the approaches proposed in this paper, we treat an illustrative example of profile milling process by using flat end mill. Simulation and experimental results are shown.
절삭가공오차보상을 위한 기상측정 데이터기반 신경회로망의 응용
서태일,박균명,조명우,윤길상 한국공작기계학회 2001 한국공작기계학회 춘계학술대회논문집 Vol.2001 No.-
This paper presents a methodology of machining error compensation by using Artificial Neural Network(ANN) model based on the inspection database of On-Machine -Measurement(OMM) system. First, the geometric errors of the machining center and the probing errors are significantly reduced through compensation processes. Then, we acquire machining error distributions from a specimen work piece. In order to efficiently analyze the machining errors, we define two characteristic machining error parameters. These can he modeled by using an ANN model, which allows us to determine the machining errors in the domain of considered cutting conditions. Based on this ANN model, we try to correct the tool path in order to effectively reduce the errors by using an iterative algorithm. The iterative algorithm allows us to integrate changes of the cutting conditions according to the corrected tool path. Experimentation is carried out in order to validate the approaches proposed in this paper.
복합곡면 가공시 공구간섭의 탐지와 공구경로 수정에 관한 연구
서태일,조명우,조재형 한국공작기계학회 1999 한국생산제조학회지 Vol.8 No.6
In this paper we deal with interference problem in the case of compound surface machining. A new tool interference detection and correction method based on the envelope of the tool path is suggested to identify and correct the tool interference - not only within the local path of tool movement, but also outside of the tool path. Therefore, the developed strategy can be used to check the possible interference in any region of the surface. In order to analyze quantitatively the milled surface errors produced by the tool interference, improved surface prediction model is also suggested in cutting process by general cutters. The effectiveness of th proposed method is demonstrated through simulation study.
Performance Comparison of Tracking Filters in Terms of Predicted Hitting Point
서태일,이범직,류존하,이성은,김의진 제어·로봇·시스템학회 2010 International Journal of Control, Automation, and Vol.8 No.2
This article describes the performance comparison of several tracking filters from the viewpoint of gun fire control. It is common that filter performance can be represented by the RMSE of the current state. However, for the design of a gun fire control system, the performance of the tracking filter in terms of prediction is more important since the current state proceeds with a designed dynamic model to a certain future which is used for the final gun order. It is shown that the predicted results amplify the current state RMSE and can be a good measure.
서태일,김의진,Suh, Tae-Il,Kim, Eui-Jin 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.6
A new gun fire control system has been developed for the Korean next generation frigate class. The engineering requirement was far more tightened than the PKG-A class for the firing range availability and gun control function since 5 inch gun is adopted for the new ship. We mention about the principal technologies required to build a generic gun fire control system and proposed methods for the new gun fire control system. The new system has been designed based on the proposed methods in order to satisfy the requirement and functionality has been proved to be acceptable through the sea trial by Korean navy.