Abstract
In this paper, a special underactuated system – a capsule robot, also called capsubot, is studied to investigate the tracking control issue of underactuated dynamic systems. A seven-step motion strategy of the capsubot is proposed. A trajectory profile is designed based on the proposed motion strategy. By using this profile, the capsubot can move effectively in a desired direction. Three control approaches are investigated: an open-loop control approach, a closed-loop control approach using partial feedback linearization technique, and a simple switch control approach. Extensive simulation studies are conducted to demonstrate the proposed approaches.
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