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Dither 효과를 이용한 서어보 위치 제어계의 응답특성 개선
홍창희,장기효 동아대학교 공과대학 부설 한국자원개발연구소 1987 硏究報告 Vol.11 No.1
The position control system of DC servomotor using dither effect improves the characteristics of response, but oscillation in setting the desired position control is caused by jerking motion in the steady state. A method for supressing the jerking motion using dither effect is proposed. By this method compensating the characteristics of response in the case of setting the desired position control, we can verify the useful-ness of this method in obtaining the best characteristics of position control response in the position control system.
洪昌憙,金斗泳 동아대학교 공과대학 부설 한국자원개발연구소 1980 硏究報告 Vol.4 No.2
Port variables of double terminated LC ladder filter are transformed by the linear transformation matrix which is chosen from the interconnection rule. Transformed variables are interpreted as a incident and reflected voltage waves. Transmission characteristics of waves are simulated by active RC circuits. Sensitivity analysis of active circuit confirmed that this method is very low sensitivity. Experiment for the 8th order Butterworth bandpass filter is given. Experimental results are agreed well with the theoretical ones.
洪昌熹 동아대학교 공과대학 부설 한국자원개발연구소 1977 硏究報告 Vol.2 No.1
1. The length of the conductor was regarded as a part of the infinitily long line and the transient distribution of the electric field was neglected 2. The substance and the thickness of the conductor were the same in every part. 3. The divergence of the current density in the condnctor was zero. 4. The static induction effect was disregarded. From the above hypothesys the following resulted, the resistance ratio of flat thin film conductor was varied by increasing frequency: at low frequency region the ratio was 1 and at medium frequency region the ratio was proportional to α√f but the resistance ratio of flat square type conductor was increased propotional to αf at higher frequency region. Also we know that flat plane conductors have b/c《1 where d is thickness and c is width.