Hideki Sawai

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We developed a 1 DOF power assist robot for lifting objects. We hypothesized that human's perception of weight due to inertial force might be different from the perceived weight due to gravitational force for lifting an object with a power assist robot. We established psychophysical relationships between the actual weights and the power-assisted weights for(More)
— In this paper, we designed a 1DOF power assist system for lifting objects. Human's vertical lifting force, comprises of inertial force and gravitational force, was considered as the desired dynamics of the system. We hypothesized that human's perception of object weight due to inertial force might be different from the perceived weight due to(More)
To extend the performance of TDNNs (time-delay neural networks) to all phoneme recognition and word/continuous speech recognition, the authors present several techniques. First, they show that it is possible to scale up the TDNN to a large phonemic TDNN aimed at discriminating all phonemes without loss of recognition performance and without excessive(More)
In this paper, we designed and controlled a 1 DOF power assist robot for lifting objects based on human operator's unimanual and bimanual weight discrimination. At first, we established psychophysical relationships between the actual weights and the power assisted weights for the objects lifted with the power assist robot. We also determined the excess of(More)
We hypothesized that weight perception (WP) due to inertia might be different from WP due to gravity for lifting an object with a power assist robot (PAR). Objects were lifted with a PAR independently under three different lifting schemes-unimanual, bimanual, and cooperative lift. Then, psychophysical relationships between actual and power-assisted weights(More)
We designed a 1 DOF power assist robot for lifting objects based on human's weight perception. We hypothesized that human's perception of object weight due to inertial force might be different from the perceived weight due to gravitational force for lifting an object with a power assist robot. In this paper, we particularly studied human's load force(More)