컬러인쇄물의 오류검사 알고리즘 구현에 관한 연구

李揆英,韓熙錫 大田産業大學校 1999 한밭대학교 논문집 Vol.16 No.1

This paper concerned about a study on the Algorithm Realization of Pattern Inspection for Color Printed Stamps. Up to date, the research of color data system in image processing have been studied widely. In this paper, color printed image using input signal in camera by median filtering technique is proposed to decrease noise and distortion in identical condition of input image, and consideration of color printed image characteristics five set of identical block of R, G, B value is extracted and then proposed the method of comparison with normal and abnormal printed color tone with trained learning of the Error Back-Propagation. The network structure induced this paper appropriate for a given problem and a good result is obtained by improve initial condition and adjust the number of hidden layer to solve the problem of real time process, learning and train. In the future, using a “C” language instead of “MATLAB”, a realization of algorithm for any kind of color printed image techniques would be improved and succeeded.

진원도 측정기 정밀도 특성 개선에 관한 연구

이규영 大田産業大學校 2002 한밭대학교 논문집 Vol.19 No.-

This paper is concerned with the precision characteristic improvement of a roundness measurement tester. The conventional roundness tester generally has used a gauge block or V block, but this method could not test the roundness exactly. In the case of using a center post, roundness is measured in the concept including both of roundness and coaxiality, TIR. However, in the measuring method using a computer, concepts of roundness, coaxiality, and swingness are exactly divided and the roundness itself is changed related to reference circles used to measuring. This paper is proposing another measuring method of a roundness measurement tester, using more improved algorithms which simulate various cases related to LSC, MZC, MCC, and MIC. In the result, the deviation of roundness testing decreased, and performance was improved up to 0.05%.

음향방출 신호를 이용한 SWS 490A 고장력강의 접합성 평가에 대한 실험적 연구

이장규,우창기,윤종희,조진호,조대희,박성완,김봉각,구영덕 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

The object of this study is to investigate the effect of joinability by using acoustic emission (AE) signals and doing a pattern recognition for weld heat affected zone (HAZ) in tensile testing. This study was carried out an SWS 490A high tension steel for electric shielded metal arc welding (SMAW), CO₂ gas arc welding and TIG welding. And correspondingly, the root openings are 3, 4 and 2.8㎜. The results of the tensile test of weld HAZ come out electric shield arc welding > CO₂ gas arc welding > TIG welding in case of single welding. It is believed that this is a phenomenon where difference of its root opening or base metal thickness. Also, the technique of AE is ideally suited to study variables which control time and stress dependent fracture or damage process in metallic materials.

Robot 제어 시스템에 관한 연구

李揆英 大田工業大學 1989 한밭대학교 논문집 Vol.6 No.2

본 연구는 로보트 매니플레이터용 직류 서어보 전동기의 속도제어에 대한 직접 극배치 PID 자기 동조 제어기의 설계 기법에 대하여 제안하였다. 각각의 제어기 매개변수들을 추정하기 위하여 순환 최소 자승 알고리즘을 사용하였으며 Diopantine방정식의 도입으로 인해, 남은 4개의 추가매개 변수들은 추정된 제어기 매개변수들을 이용하여 새롭게 유도된 방정식에서 구하였다. 제안된 제어기의 성능을 평가하기 위하여 최소, 비최소 위상 시스템에 대한 시뮬 레이션을 하였고 실제 로보트 매니플레이터용 전동기에 대하여 각각의 부하 실험을 거쳐 특성이 양호함을 검증하였다. This paper concerned about a study on the direct pole placement PID self-tuning controller design for Robot manipulator control system. The method of a direct role placement self-tuning PID control for a DC servo motor of Robot manipulator tracks a reference velocity in spite of the parameters uncertainties in non-minimum phase system. In this scheme, the parameters of classical controller are estimated by the recursive least square(RLS) identification algorithm, the pole placement method and diophantine equation. A series of simulation in which minimum phase system and nonminimum phase system are subjected to a pattern of system parameter changes is presented to show some of the features of the proposed control algorithm. The proposed control algorithm which shown are effective for the practical application, and experiments of DC servo motor speed control for Robot manipulator by a microcomputer IBM-PC/AT are performed and the results are well suited.

疑似 랜덤 剌戟을 利用한 伸張 反射 應答特性의 시스템 識別에 關한 硏究

李揆英 大田開放大學 1985 論文集 Vol.2 No.-

This paper describes a system Identification techniques which are applied to the normal human stretch reflex response characteristics. The system I Identification techniques are performed by crosscorrelation a pseudo random displacement of the forearm with surface electromyogra-Phic signal obtained from biceps muscle. With the experimental examinations, Clear response are obtained for small amplitudes of 0.5 [mm] at the wrist typically with testing duration of about 1(min), and additionally a reflecting response components of the limb control system which actuate with automatic are confirmed here also. The results obtained using current techniques demonstrates that, Highly reproducible measurements of the reflex response to the stretch by means of In put/out put crosscorrelating method can be obtained from muscle of the upper arm, and these are compared with the model of simulations based upon a linear stretch reflex systems. Further more, In cases of the reflex system is 13ehaving nonlinearly in response to the larger with multiplex input yet remains yet unsettled problem, there of this problem should be considered in after more details.

로보트 매니풀레이터의 적응제어 알고리즘 구현에 관한 연구

李揆英 大田産業大學校 1995 한밭대학교 논문집 Vol.12 No.1

This paper deals with A study on the adaptive control algorithms for robot manipulator Robot manipulator used in complex industrial applications are beyond the capability of the relatively simple constant-gain linear control system commonly used for current industrial manipulators. They compensate porly for the nonlinear dynamics characteristics of manipulator. there of this paper deals on the development of an adaptive algorithms which adjust, in real time, the control parameters to compensate for manipulator nonlinear characteristics and changes in its environment results are also presented for two devices which show that the algorithms in practical and capable of producing significantly improved system dynamics performance. In the results, through simulation and experiments the developed algorithm characteristics of Robot manipulator revealed highly improved peformance.

醫療機器의 動特性 改善을 爲한 LINEAR STEP MOTOR의 設計

李揆英 大田開放大學 1985 論文集 Vol.3 No.-

This paper describes a new design method of LSM (Linear Seep Motor) for dynamic characteristic Improvements in medical and biological instrumentation. Present-day medical apparatus and instruments for bio-medical investigations operating In automatic modes and must be provided with electric drives assuring good motion performance, i.e. outstanding controllability, response time, and accuracy characteristics. In open-loop drive systems with LSM, using modern control methods, high accuracy In Implementation of displacement is best assured when the shape and amplitude of the synchronizing - force curve for each displacement along the motion axis should remain unchanged which, together with improved position accuracy, assures better dynamics characteristics of the drive. In the results, a polarized LSM with separate excitation winding, a sine distribution of the force shape curve and high positioning accuracy are assured by a structure consisting of individual single-phase modules, each Having an individual winding and Individual excitation loop. Here equality and constancy of the mmf's of all working gaps are easily achieved.

SWS 490A 강의 용접 열영향부 음향방출 특성에 대한 연구(1)

이장규,우창기,박성완,윤종희,조진호,김봉각,구영덕 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4

The object of this study is to investigate the effect of compounded welding through the AE(Acoustic Emission) characteristics for weld HAZ(Heat Affected Zone) under the static tensile test. This study was carried out an SWS 490A, high tension steel for electric shield metal arc welding(SMAW), CO₂gas arc welding and TIG welding. Data displays are based on the measured parameters of the AE signals, along with environmental variables such as time and load. The accumulated AE event curve of HAZ definitely have the point of inflection subject to tensile test. The results of the tensile test of HAZ come out electric shield arc welding > CO₂ gas arc welding >TIG welding in case of single welding, but generally the tensile test of HAZ come out electric shield arc welding > TIG welding > CO₂ gas arc welding. These history plots give us useful and powerful information to analyze the results of material evaluation testing.

DPLL方式에 의한 3相 誘導 電動機의 速度制御 시스템 構成

李揆英 건국대학교 1983 論文集 Vol.16 No.1

This paper describes the system construction of three phase induction motor for speed control using DPLL(Digital Phase Looked Loop) technique. The block diagram and the control circuitry have been observed, a mathematical model have been developed to predict the system construction and the consideration of the nonlinearities in the system could be incoporated in the model. The system stuided in this paper combines the excellent speed control regulation characteristic of the Phase Locked Loop with the numerous advantages of the induction motor over the d.c. motor.

人間팔 運動 制御系의 시스템識別

李揆英 大田工業大學 1988 한밭대학교 논문집 Vol.5 No.1

This paper deals with the system identification of Human Hand Movement Control Systems. The system identification techniques are performed using a pseudo-random displacement of the forearm with surface electromyographic signal obtained from biceps muscle. The results demonstrates that, highly reproducible measurements of the reflex response to the stretch by means of in-out put crosscorrelating method tan be obtained from muscle of the upper arm and compared with the model of simulations based on a linear stretch reflex systems.