Abstract
This paper reports our developing sit-to-stand support system using ground reaction force to operate device. Our device is controlled by information of the user grand reaction force (GRF). In this system, the user don't need to operate the switch or button and is given suitable and dynamic assist according to user lower limb power. In this presentation we show first prototype device and describe about device control rule, experiment results and the found problems of control. Next, experiment device for new version to solve these problems is shown. This device use for analysis of support trajectories. The support trajectories were decided by sit-to-stand experiment and other discussion.
