Abstract

Miniature vertical take-off and landing unmanned aerial vehicles (VTOL UAVs) make various missions possible alone. Since simple tail-sitter UAVs have any extra equipments for tail-sitting maneuver, attitude control is difficult problem. This paper discusses agile turnaround flight utilizing post-stall maneuver for tail-sitter VTOL UAVs. The minimum longitudinal travel distance turnaround strategy is formulated and optimization problem is solved. In order to achieve agile turnaround stably, a novel attitude control strategy for a tail-sitter VTOL UAV is implemented. The results show that the post-stall maneuver with proposed attitude controller achieved minimum travel distance turnaround stability, while conventional attitude controller fails.

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