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This paper presents a model-based implementation approach to realize a position servo control system for low-cost dc motors using a controllable Petri net (CrPN). The CrPN model inference engine is embedded inside the sensor node to form an autonomous agent, and the autonomous agent is further used to interpret and execute CrPN-based motor control models. The CrPN model can be evaluated to examine...
This paper describes an electrooculography (EOG) based human-wheelchair interface for wheelchair users. A pair of electrodes which measures the eye-gaze direction of users is desired as wheelchair manipulation commands. In addition to EOG based wheelchair manipulations, this paper also introduces ultrasonic arrays for detecting distances to actively avoid collisions. In order to simplify setup procedures...
Powered wheelchairs are popular mobility aids for most disabled patients and elders. Most of powered wheelchairs are manipulated via a conventional joystick. The powered wheelchair user has to control the direction and velocity of a powered wheelchair in a very narrow joystick operation range. Therefore, the user's joystick command may be very sensitive to the wheelchair motions. In addition, such...
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