펌프를 위한 誘導電動機의 구동能力

尹良雄,朴椿培 원광대학교 공업기술개발연구소 1983 工業技術開發硏究誌 Vol.3 No.-

Pumps have historically been drivem bγ constant Speed ac motors with flow control , when required provided by valves. Electrical energy is wasted as a result of the tliottling effect of control valves. these drives can offer substantial economic benifits in other variable flow applications based on reduced energy and maintenance coats. The energy saving potential of adjustable-speed drives will be discussed, followed by a brief description of the opelation and relative benefits of different solid-state acdrive types.

適應制御시스템의 構成을 위한 適應觀測器의 수감속도 改善에 관한 硏究

尹良雄 圓光大學校 1986 論文集 Vol.20 No.2

適應觀測器의 수감속도 改善은 工程의 特性을 나타내는 數學的 모델을 끊임없이 改善하면서 적절한 制御器의 媒介變數를 결정하거나 媒行變數를 수정하는 方法으로 보다 安全하고 效率的인 方法으로 시스템의 운용을 기대할 수 있다. 適應法에는 경사법 최소자승법 가중최소자승법이 있으며 直流機의 速度制御를 위한 方法에는 수감속도에 따라 비교 검토하였으며 이에 의한 Simulation으로 확인하고 Computer 처리를 하여 그 결과를 그라프로 표시하였다. 또한 直流電動機의 수감속도 變換은 다음과 같은 結論을 얻었다. 첫째 電動機의 타코미터 추적이 修行時間을 고려하여 150 (m sec)로 설정한 電壓-時間의 스템파형과 正弦波形의 速度制御는 최소자승법 보다 가중최소자승법을 이용하는 것이 더 효과적임을 알 수 있으며, 둘째 適應觀測器의 工程의 媒介變數값이 一定한 상수일때는 40 Stepdlgn 계단형으로 바꾸어지는 경우에도 가중 최소값이 더 빠른 수렴속도로 나타내고 있었다. 셋째 수감속도는 加重係數 入값이 적어짐에 따라 증가되었지만 외부에 민감한 反應이 발산되는 경우가 있으므로 너무 적은 入값은 좋지 못하다. 넷째 電動機의 速度를 변화하였더니 工程出力에 대한 응답은 最大電壓은 감소를 나타내고 있다. In this paper, We have investigated the variable parameter and time-variable system in the plants. It has used the MRAC method to which approached the out put of a standard model to process output. There are the gradiant method, the least method or weighted least square method in the MRAS method but this paper has Compared the least method with weighted least square method, and it is applied to the speed of DC moter. ① this paper has checked the stability problem of systems with the constitution of the discrete adaptive controllers which contained the deduced process loefficient by the adaptive algorism in the constitution of the adaptive control systems. ② And has simulated the adaptive obsevers and the adaptive control system by computer. ③ We has made experimental checking for the speed change of DC Motor to compare the actual deduction with Algorism method. We have operated the simulation in cases that the parameter value of the process is a constant and turms to gradual type after the 40 step. Also, the rank which exist within the unit circle in the Z plane and has changed by the parameter in the plant.

스텝응답을 이용한 공정의 전달함수 동조

윤양웅,최정내,김진권 원광대학교 2001 論文集 Vol.26 No.-

논문에서는 공정동조를 위한 새로운 방법을 제시한다. 미지의 동특성을 가지는 공정은 PID 제어기를 적용하기 위해 2차 전달함수로 모델링된다. 우선 오버슈트(os), 정정시간 (ts), 정상상태 값 (yss)가 미지공정의 스텝응답으로부터 얻어지고, 위의 세가지의 파라메터를 이용하여, 전달함수를 얻을수 있다. 제안된 동조방법의 우수성을 보이기 위해 다른 동조방법들과 시뮬레이션을 통하여 비교하여 제시하였다. In this paper, a new method for system identification is proposed. Unknown dynamic system is identified to the second order transfer function, which can be applied to PID controller design. First, overshoot(os), settling time(ts), and steady state value(yss) are obtained from the step response of unknown dynamic system. And then, we can get the second order transfer function using equations which are extracted from those three parameters(os, ts, yss) through mathmatical analysis. In addition, simulation is carried out to show excellent performance of proposed identification method compare with other.

다중 전압형 PAM 인버터를 이용한 무효전력 보상장치 (SVC)의 고조파 저감에 관한 연구

윤양웅,오훈 원광대학교 공업기술개발연구소 1995 工業技術開發硏究誌 Vol.15 No.-

For stabilization and improving power factor in the power lines, various Static Var Compensators(SVC) have been considered to be installed and partly appllicated already. With all these merits of the SVC, it stil has demerites, principally evoking harmonic problems. So far, many harmonic reduction the inverters have been used in vurious parts. In this paper, the reactive power is controlled by amplitude of the output voltage. This paper propose that the multiple voltage source PAM inverter have controllable power factor made by load vary at receive-stage as lagging and leakage control. The theoretical analysis on this system was confirmed through the computer simulation and the experiments.

規則基盤을 이용한 直流 電動機의 速度 制御에 關한 硏究

윤양웅,오훈 원광대학교 공업기술개발연구소 1993 工業技術開發硏究誌 Vol.13 No.-

According to the rapid development of computer, control system is incorporated a rule base for the solution of specific problem. In this paper, some rules for the speed control of D.C shunt motor in variable load are presented. Rule base is consists of supervision, reasoning and tuning rules and regulation rules the supervision rules are made up of logics for detection of torque and speed error, and the reasoning rules are made up of logics for decision of field resistance. The tuning rules are made up of logics for resistance tuning suitable to torque and speed variation. Rule base of regulation, when a control system has disturbance, is decided by the error and the rate of error variation. As these, rule base is used as an element of speed controller, It's compared the result of experiment and simulation, the robust and accurate control function of rule base control is demonstrated by computer simulation.

퍼지 레귤레이터를 이용한 서보 모터 속도제어

윤양웅,오훈,이희승 원광대학교 공업기술개발연구소 1993 工業技術開發硏究誌 Vol.13 No.-

In this paper, Pl controller with fuzzy regulator for D.C servo motor speed control in variable load are presented. Fuzzy regulator is made up of logic for fuzzification, inference, and defuzzification. The rule of fuzzy regulator and, scale mapping for the fuazification of regulator input and the defuzzification of real regulator output are decide by experiment. The function of Pl controller with fuzzy regulator is compared Pl(proportional integral)controller. The parameters of Pl controller are decided by the unit step-responce method. The robust and accurate regulation function of Pl controller with fuzzy regulator is demonstrated by computer simulation.

전문가 기법을 이용한 직류전동기의 속도제어

윤양웅,박왈서,오훈 원광대학교 공업기술개발연구소 1992 工業技術開發硏究誌 Vol.12 No.-

In this paper, some rules for the speed control of D.C motor in variable load are presented. Rule base is consists of supervision, reasoning and tuning rules. The supervision rules are made up of logics for detection of torque and speed error, and the reasoning rules are made up of logics for decision of field resistance. The tuning rules are made up of logics for resistance tuning suitable to torque and speed variation. As these rule base is used as an element of speed controller. It's compared the result of experiment and simulation, the robust and accurate control function of rule base control is demonstrated by computer simulation.

라플라스변환 기법을 이용한 무선중계소 접지계의 과도특성 해석

윤양웅,김왕 원광대학교 공업기술개발연구소 1992 工業技術開發硏究誌 Vol.12 No.-

접지계의 과도특성은 통신설비에 耐雷設計에 있어서 매우 중요하며, 이는 접지전극의 형상과 규모, 대지고유저항 그리고 유입전류의 크기등에 의존하다. 특히 山頂에 위치한. 무선중계소의 경우는 안전한 접지설계를 위하여 특별한 해석방법이 요구된다. 본고에서는 라플라스변환 기법을 이용한 접지계의 합성 써어지임피던스 도출 알고리즘을 제시 또한, 모의결과와 실측치의 비교검토에 의해 제안한 알고리즘의 타당성을 입증하였다. The transient characteristics of grounding systems is vary important in the lightning protection design of communication installations and depend on the shape and size of grounding electrodes, soil resistivity and magnitude of injected current. Specifically, the case of radio relay station in a mountaintop region reguires special analysis methods for a safe grounding design. This paper presents an algorithm to compute the total surge impedance of grounding systems using the Laplace Transform technique and deals with the analysis of the transient characteristics on grounding systems. Also, simulation results are compared with the measured datas to prove the validity of the algorithm.

경험적 규칙을 이용한 직류 서보전동기의 속도제어기에 관한 연구

윤양웅,박왈서 원광대학교 공업기술개발연구소 1990 工業技術開發硏究誌 Vol.10 No.-

Abstract The idea of expert control is used Some heuristic rules in Control system. In order to elimenate all difficulties of Control system effectively, expert Control is studied. In this paper, a Pl Controller used Heuristic Rules for DC Servo Motor speed Control is presented. Some heuristic rules based on relay experiment are used for the setting of parameter controller in varialle load of D.C servo motor. The supervisor analyzes the scale of load torque, Based on the new Scale of load torque and rule base, Pl controller for the D.C Servo motor is configured newly. We show that heuristic rules are used as a element of the closed loop in Control System.

Computer 를 이용한 영상 변화 부호화에 관한 연구

尹良雄,李鍾寅 원광대학교 공업기술개발연구소 1984 工業技術開發硏究誌 Vol.4 No.-

This paper presents that the fast Discrete Cosine-Sine Transform (DCST) algorithm having the orthogonal property derived from the Discrete Cosine and Discrete Sine Transforms is more advantageous for the real-time processing than the Discrete Cosine and Discrete Sine Trsnsforms. For N=16 and ρ=±0.9, we are compared the Discrete Cosine-Sine Transform with the Discrete Cosine and Discrete Sine Transforms by rate distortion and restriction error. Finally, computer simulation compared the constructed image data compression chosen 4:1 and 8:1 with original image.