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Proceedings Paper

Servosystem of the EISCAT Svalbard antenna
Author(s): Torben Andersen
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Paper Abstract

The antenna of the EISCAT Svalbard Radar is designed for the frequency range 470 - 530 MHz. The servo system has thyristor controlled dc-motors with digital cascade controllers for tachometer and position loops. The motors are rated on the basis of wide load considerations. The motors are connected via gears and are electrically preloaded using a special scheme. Special velocity profiles are used during acceleration. A non-linear model has been used for simulation of servo performance under wind load. A linear model was formulated to study stability conditions. A special active damping algorithm is applied to damp vibrations in drive motors coupled in parallel. Frequency response measurements on the antenna were carried out using the control computer. Good agreement was found between measurements and model results.

Paper Details

Date Published: 8 June 1995
PDF: 12 pages
Proc. SPIE 2479, Telescope Control Systems, (8 June 1995); doi: 10.1117/12.211470
Show Author Affiliations
Torben Andersen, Nordic Telescope Group (Denmark)

Published in SPIE Proceedings Vol. 2479:
Telescope Control Systems
Patrick T. Wallace, Editor(s)

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