This paper aims to develop a new operation device with less physical burden than standard joysticks, considering the physical characteristics among those who feel difficulty in operating standard joysticks. A muscular dystrophy was selected for the interview and system validation as the subject. An input device with small displacement is needed because of the subject cannot operate a standard joystick satisfactorily. Unlike the displacement-input method of standard joystick, the force detecting method developed an interface which does not input displacement at all. However, force input method tends to directly influenced with respect to disturbance. We proposed a disturbance removal method for extracting an operating intention using experimental results on the road including shock or vibration. Finally, muscular dystrophy subjects are employed to examine the validity of the developed force detecting interface.
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