On-off intermittency: power spectrum and fractal properties of time series
MSTD '95 Proceedings of the workshop on Measures of spatio-temporal dynamics
Forward models for physiological motor control
Neural Networks - 1996 Special issue: four major hypotheses in neuroscience
The Psychology of Human-Computer Interaction
The Psychology of Human-Computer Interaction
Tracking control properties of human-robotic systems based on impedance control
IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans
Variable structure control with sliding sector
Automatica (Journal of IFAC)
Advances in Human-Computer Interaction
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Human characteristics concerning voluntary motion control are investigated, because this motion is fundamental for the machine operation and human-computer system. Using a force feedback haptic device and a balancing task of a virtual inverted pendulum, participants were trained in the task, and hand motion/force was measured, and brain activity was monitored. First, through brain analysis by near-infrared spectroscopy (NIRS) and motion analysis of the pendulum, we identified a participant who was the most expert. Next, control characteristics of the most expert were investigated by considering the operational force and delay factor of a human. As a result, it was found that predictive control based on velocity information was used predominantly although a perception feedback control against the pendulum posture worked. And it was shown that an on-off intermittency control, which was a strategy for the skilled balancing, can be described well by a linermodel involving two types of time shifts for the position and velocity. In addition, it was confirmed that the cortex activity for observation in an ocular motor control area and visual processing area was strong to enhance above-mentioned control strategies.