20614 カオス状変動圧力を与えた生体時系列信号の分析(非線形)

概要

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Results of biological signal analysis of human body subjected to chaotic excitation are presented. Sinusoidal pressure and chaotic pressure are applied to the loins, in reclined position on the bed, respectively. The experiment is then repeated with blood stagnated human body. Electrical signals on the skin are then measured. An electrocardiogram (ECG) is detected from a chest of the body, while electromyogram (EMG) is detected from the muscles of both arms. Pulse sound diagram (PSD) is recorded by using a microphone. Based on time-series of ECG, EMG and PSD, the signals were then analyzed by power spectra and by calculation of their Maximum Lyapunov exponents. It is found that human muscles show influences whether by sinusoidal or chaotic pressure. It is also found that chaotic pressure gives the ECG lower Maximum Lyapunov exponent in both normal and blood-stagnated condition.
一般社団法人日本機械学会の論文
2006-03-09