http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김기열,서성정,서성섭 한국공업화학회 2005 응용화학 Vol.9 No.1
This work presents an experimental study of a pressure swing adsorption (PSA) unit running a traditional four cycle and a cycle with pressure equalization step for oxygen separation from air using a molecular sieve 5A. The effects of pressurization step duration, adsorption step duration, and pressure equalization step duration on the product purity, recovery, and productivity were investigated. The optimum operating conditions were observed for given oxygen purity in the product. The experimental results can provide guidance for searching appropriate operating conditions to achieve desired product quality in PSA process.
An AE System Using Fuzzy PI Control for Mobile Digital Camera
김기열,조선호 한국정보기술학회 2017 한국정보기술학회논문지 Vol.15 No.7
An AE (Auto Exposure) system for a digital camera controls the exposure automatically to optimize the brightness of the output image. Look-up tables and PI control methods are used for conventional AE algorithms. But a mobile digital camera can't control the exposure effectively with a conventional AE algorithm because of the many limitations of a miniaturized module. In this paper, we propose a new AE system that applies fuzzy PI to improve the AE of a mobile digital camera. In the proposed AE system, we compensate for target setting, frame delay, and Gamma Correction to accomplish more effective AE. The proposed AE system was compared with a conventional system and showed improved AE control speed, control stability, and luminance expression.
가변환경하의 불안정 시스템에 대한 자율적응 제어기 설계
김기열,이종성 부천대학 2003 論文集 Vol.24 No.-
부품들에 대한 열반응 검증 시스템은 모델링이 없으므로 일반적으로 PID 알고리즘에 의해 제어된다 그러나 이 알고리즘에 의한 제어는 적절한 제어에 있어서 많은 한계성을 지닌다. 이러한 문제를 해결하기 위해 시스템에 대한 자율 탐색기능을 갖는 퍼지 알고리즘에 기반 된 제어기를 설계한다. 퍼지 입력소속함수가 설정된 안정영역에 기반 되어 적응되고, 규칙기반이 시스템 반응에 기초되어 변환된다. 추론과 비퍼지화를 통해 계산된 출력값이 시스템 동작에 알맞은 값으로 변환된다. 이러한 조절을 통해 시스템이 불안정 영역으로 이동하는 것을 최소화시킨다. The system that is thermal test system for elements has been controlled generally by PID algorithm because of its characteristic. There is not a mathematical model for the system. So the system that is use the PID controller is not properly operated. To solve this problem, we propose a fuzzy algorithm that parameters and rule base is selected by self-searched algorithm for each system. The input fuzzy membership function is adapted based on the set stable range. Output membership function is nearly fixed but some parameter is adjustable. The rule base is changed under basis on the system response. The output value computed through inference and defuzzification is mapped into a value that is proper for the system operation. Through this regulation, it will be possible to prevent the temperature of system to go into the unstable temperature.