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Analysis of Aging Effect on Human Walking Gait Using Detrended Fluctuation Analysis Technique
M. Arif,Y. Ohtaki,T. Ishihara,H. Inooka 한국과학기술원 인간친화 복지 로봇 시스템 연구센터 2002 International Journal of Assistive Robotics and Me Vol.3 No.4
Movement of center of gravity of the human body plays a crucial part in the stability of the human walking. In this paper, we have investigated the effect of aging on the acceleration of center of gravity using a portable 3D acceleration measurement system. Acceleration of the center of gravity data of young and elderly subjects is analyzed during normal walking using detrended fluctuation analysis technique. It was observed that the scaling exponents of elderly subjects in short term region are less than young subjects. It shows that walking of elderly subjects is less correlated in the short-term region putting them on more risk of falls.
基礎部에 外亂이 作用하는 ONE-LINK 彈性 ARM의 變位制御에 關한 硏究
홍동표,尹英進,長南征二,猪岡光 全北大學校 1991 論文集 Vol.33 No.-
This paper presents a study on the displacement control of the one-link flexible arm whose tip keeps a constant distance to the fluctuating surface of the target under fluctuation throuhg theoretical analysis and computer simulation. The analytical model is composed of three parts of DC SERVOMOTOR, FLEXIBLE ARM with a length(L), TIP MASS, and acted on the moment and shear force on each part of flexible arm. The relative displacement between the arm and the target is controled by DC servomotor driven by a feedback signal composed of the tip displacement and velocity. In the numerical analysis, Laplace Transform is used for development of the governing equations, and its solution is obtained by applying the method of Numerical Laplace Inversion used the Weeks Method. On this paper, the analysis about transient response of the flexible arm subjected to the square sine wave input signal and unit step input signal was performed through the theoretical analysis and computer simulation.