Dynamics/Control of a Radio Telescope Receiver Supported by a Tethered Aerostat
Canadian researchers have proposed a design for a new radio telescope consisting of an array of very large reflectors. A large multitethered aerostat will be used to support each reflector's receiver. The length of each tether can be adjusted by ground-based winches, and active control is used...
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Veröffentlicht in: | Journal of guidance, control, and dynamics control, and dynamics, 2002-11, Vol.25 (6), p.1107-1115 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | Canadian researchers have proposed a design for a new radio telescope consisting of an array of very large reflectors. A large multitethered aerostat will be used to support each reflector's receiver. The length of each tether can be adjusted by ground-based winches, and active control is used to overcome the effects of wind turbulence on the aerostat. To aid in the system's mechanical and controller design, a computer model has been developed, including models of the tethers and the aerostat. Two types of aerostat have been considered: spherical and streamlined. A wind turbulence model is incorporated to provide disturbance to the system. Controllers are used to adjust the tether lengths based on feedback of the receiver's position. The model is used to optimize the control gains. We find that, with 50 kW available at each winch, it is possible to maintain the receiver's position within 85 cm of its desired location, even in the worst-case configuration. (Author) |
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ISSN: | 0731-5090 1533-3884 |
DOI: | 10.2514/2.4990 |