| Abstract:
In recent years, unmanned aircraft used as High-Altitude Platform Systems have been studied in research and industry as alternative technologies to satellites. Regarding actual operation and flight performance of such systems, a linked formation of multiple aircraft, so called multibody aircraft, seem to be a promising aircraft configuration. In terms of flight dynamics, those aircraft strongly differ from classical rigid-body and flexible aircraft, because a strong interference between flight mechanic and formation modes occurs. An inner-loop flight control law provides a frequency separation of both mode groups. The inner loop holds the shape of the formation and transforms the multibody aircraft to a conventional aircraft in terms of flight dynamics, however, particular characteristics exist, like flying with airspeed close to stall and the extremly large wingspan, which have to be considered for manoeuvring and in the outer-loop flight control law design. In addition, the multibody aircraft is an over-actuated system. This paper describes the outer loop flight control law design for flight path tracking of a multibody aircraft with control allocation. The presented method can be adopted to any other high-aspect ratio aircraft with similar dynamics
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View PDF CEAS-GNC-2019-028