Stability analysis for the full system is provided using hybrid Lyapunov and invariance principles. The continuous dynamics are modeled by the Newton–Euler formalism, taking into account the effects of the buoyancy and drag phenomena, normally neglected in aerial vehicles.Ī hybrid controller is designed for trajectory tracking considering the full system, including a transition strategy to assure the switching between mediums. The multi-medium system is treated as a hybrid system with continuous dynamics while performing in both air and underwater, and discrete jumps in the medium density during the transitions. ![]() Modeling and control of a multi-medium unmanned vehicle capable of seamless operation in air or underwater is introduced in this paper.
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