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정영석 전력전자학회 2005 전력전자학회 논문지 Vol.10 No.2
In this paper, a digital current mode control is designed for the power converter applications. The designed digital current mode controller is derived analytically from the continuous time small signal model of the power converters. Due to the small signal model based derivations of the control law, the designed control method can be applicable to boost, buck, and buck-boost converters. It is also proven that the controlled power converter employing the designed digital current mode controller is always stable regardless of an operating conditions. In order to show the usefulness of a designed controller, experiments are carried out using a 16bit DSP micro-processor, TMS320LF2406A. 본 논문에서는 전력변환회로를 위한 디지털 전류모드제어기를 소신호 모델식을 기반으로 하여 설계한다. 다양한 응용 가능성을 내포하고 있는 디지털 제어기를 전류모드제어를 사용하는 전력변환회로의 설계에 응용한다. 전력변환회로의 상태평균화 기법을 적용한 연속 시간 소신호 모델을 이용함으로써 부스트, 벅, 벅-부스트 컨버터에 모두 적용 가능한 디지털 전류모드제어기를 설계하고, 설계한 제어기는 모든 시비율 동작 조건에서 안정함을 확인한다. 16bit DSP 마이크로프로세서인 TMS320LF2406A를 사용하여 설계된 디지털 제어기를 구현하고, 아날로그제어기를 이용한 전류모드제어에서의 동작 조건에 따른 불안정성 문제를 해결할 수 있음을 실험을 통해 확인한다.
한국 소년비행의 현황과 그 대책 : AN ANALYSIS OF ITS TRAITS AND COUNTERMEASURE
鄭榮錫 연세대학교 대학원 1971 延世論叢 Vol.8 No.1
This study has the objectives of examination of the causes and traits of the juvenile delinquency in Korea, and, formulating the effective countermeasures against it. It is the common feature in every and each country after the second World War that the juvenile delinquency is becoming deadlier in its nature and is spreading ubiquitously like maglinant illness, posing serious social problem. This research undertakes to clarify the true causes and trends of the present juvenile delinquency, which is the vital issue of the contemporary criminology, and propose some alternatives to contribute to the better upbringing of the youth in Korea. This Article is divides into largely 4 parts including introduction and conclusion part. Two main parts among them are composed of the present trend of juvenile delinquency and its countermeasures. The part of the present trend of the juvenile delinquency is analysed and examined by means of the perusing the various data and statistics on the delinquency (such as White Papers on the Crime by the Attorney General, statistic data by various reformatories). The part of its countermeasures is devoted to the derections of the juvenile delinquency protection. The followings are the contents of this study : Introduction Phenomenology (Causes of the Juvenile Delinquency) I. Recent global trend of the juvenile delinquency II. Trends and characteristics of the juvenile delinquency in Korea III. Causes leading to the juvenile delinquency 1) Variables in analysis of its causes 2) Natural causes being liable to the juvenile delinquency 3) Environmental causes being liable to the juvenile delinquency Countermeasures (Policies to prevent the Juvenile Delinquency) I. General principles in the protection from the juvinile delinquency II. Juvenile Law 1) History of juvinile law 2) Juvenile law in Korea (preventive legislation against the juvenile delinquency in Korea) III. Protective sanction and penalty for the delinquents IV. Improvements in presenting establishments for the juvenile delinquency V. Conclusion In conclusion, I evaluated the effectiveness of the current reformative, protective actions and the punishment system as the preventive measures of the juvenile delinquents and proposed some alternatives, that is, the establishments of Juvenile Classification Home, of Probation and of Juvenile Protection Police.