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Dynamic modeling and stability analysis of a high altitude airship
Ramesh Hun,
Published in International Council of the Aeronautical Sciences
2016
Abstract
Use of Lighter-Than-Air (LTAs) vehicles for the telecommunication and surveillance purposes has attained a great deal of interest in recent years. This platform is very attractive because of its long endurance and cost effectiveness. The shape of airship envelope has huge impact on its performance. Literature suggests that shape of the airship should be such that it should have significant maneuvering capabilities and stability in the stratosphere. This paper presents open loop and closed loop stability analysis of Gertler shape of stratospheric airship which has minimum circumferential stresses and minimum drag characteristics. The complete 6-DOF nonlinear mathematical model of Gertler shape has been developed for the analysis of stability. As airship is a buoyant vehicle, added mass effect is taken into account while deriving the equations of motion. Stability analysis is carried out using the linearized model at a desired operating condition using both time domain and frequency domain techniques. Different motions of the airship with its control characteristics is explained at the end of paper. This analysis is to be used to develop Guidance, Navigation and Control (GNC) strategy for the stratospheric airship.
About the journal
Journal30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016
PublisherInternational Council of the Aeronautical Sciences
Open AccessNo
Concepts (18)
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    Air navigation
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    Airships
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    Cost effectiveness
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    Crashworthiness
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    Equations of motion
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    Frequency domain analysis
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    Maneuverability
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    Stability
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    Vehicles
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    ADDED MASS EFFECTS
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    CLOSED-LOOP STABILITY ANALYSIS
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    Control characteristics
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    Frequency domain techniques
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    GUIDANCE , NAVIGATION AND CONTROLS
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    High altitude airships
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    MANEUVERING CAPABILITY
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    NONLINEAR MATHEMATICAL MODEL
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    Time domain analysis