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Proceedings Article

Servosystem of the EISCAT Svalbard antenna

[+] Author Affiliations
Torben Andersen

Nordic Telescope Group (Denmark)

Proc. SPIE 2479, Telescope Control Systems, 301 (June 8, 1995); doi:10.1117/12.211470
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From Conference Volume 2479

  • Telescope Control Systems
  • Patrick T. Wallace
  • Orlando, FL, United States | April 17, 1995

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.

© (1995) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Torben Andersen
"Servosystem of the EISCAT Svalbard antenna", Proc. SPIE 2479, Telescope Control Systems, 301 (June 8, 1995); doi:10.1117/12.211470; http://dx.doi.org/10.1117/12.211470


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