http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박영필,이규섭,최봉환 대한기계학회 1988 대한기계학회논문집 Vol.12 No.5
본 연구에서는 애널로그(analog)적 기법으로 진동계의 측정된 변위를 정보로 미지의 외력을 추정하고, 이 추정된 외력을 반대 힘으로 되먹임 시킴으로써 진동을 감 쇠시키는 제어계를 구성하였다.특히 관측기의 매개변수(parameter)들을 전체 계를 안정화시키는 방향으로 결정해 줌으로써 진동계의 매개변수들이 시간에 따라 변하는 경우에도 적용시킬 수 있도록 하였다. 이러한 제어계는 순간순간 변하는 외란을 추 정하여 같은 크기의 반대된 힘으로 되먹임시켜주므로 힘 상쇄 관측기라 한다. A force cancelling observed to control the vibration of a single degree of freedom elastic system subjected to an arbitrary, unmeasurable disturbance is considered in this paper. The main idea of a force cancelling observer is how an estimate of the excitation can be derived and used to generate a control force which reduces the vibration. This control is shown to be robust with respect to the parameters describing the behavior of the system. Experimental and numerical results are presented which show the efficacy of the observer when the system is excited by periodic, random, and impulsive torques.
박영필,강성구,유원희 연세대학교 대학원 1992 延世論叢 Vol.28 No.1
The dynamic behavior of a complex mechanical structure can be identified by dividing the structure into substructures, and analyzing the dynamic characteristics of these components. Generally, the dynamic characteristics of mechanical structure are strongly affected by the properties of joint parameters. In this thesis, to identify the dynamic characteristics of joints of mechanical structure, the experimental identification method, which uses the frequency response function, is considered. To reduce the effect of unavoidable measurement noise in experiments, matrix inverse procedure is not used in this method. To confirm this method, the computer simulation is performed by using frequency response function with noise effect, and the experiments are carried out for the simple structure. The study verified that the dynamic characteristics of joint parameters can be identified accurately in spite of the measurement noise.