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- W2024993756 abstract "I N THIS Erratum the authors revise the paper “Influence of Wind Speed on Airship Dynamics” [1]. After a careful mathematical deduction, it was verified that this influence under a constant translation wind indeed does not exist, and the results presented by Thomasson [2,3] are confirmed. In other words, the airship dynamics equation is the same when expressed in terms of the inertial velocity with no wind or in terms of the relative air velocity under a constant translation wind. To confirm the results, the airship dynamics is expressed using the Lagrangian approach, instead of the originalNewtonianmethod used in Azinheira et al. [1]. In addition, the new kinematics representation with quaternions used in Azinheira et al. [4], describing the velocity changes from local to Earth frames, is used in the derivation of a compact form of the force equation. Assuming a constant translation wind, the new force equation written in terms of inertial and wind velocities is then transformed to be a function of the relative velocities. The force equation expressed in this way shows the same structure and the same terms as the one expressed with the inertial andwind velocities, confirming the invariance of the dynamics under a constant translation wind. In a last step, some terms in the kinematics force equation are discarded, as they are already accounted for in the aerodynamic forces. These terms are proportional to the squared relative velocity, and their influence is already considered through the aerodynamic coefficients measured in wind-tunnel experiments. This final step is particularly important for simulation purposes, otherwise some terms would be considered twice in the dynamicmodel. Simulation results, obtained using the AURORA simulator platform support the theoretical conclusions." @default.
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- W2024993756 date "2008-03-01" @default.
- W2024993756 modified "2023-09-23" @default.
- W2024993756 title "Erratum on Influence of Wind Speed on Airship Dynamics" @default.
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- W2024993756 doi "https://doi.org/10.2514/1.33409" @default.
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