Servosystem of the EISCAT Svalbard antenna

Torben Andersen

doi:10.1117/12.211470

8 June 1995 Servosystem of the EISCAT Svalbard antenna

Torben Andersen

Proceedings Volume 2479, Telescope Control Systems; (1995) https://doi.org/10.1117/12.211470
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

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.

Citation Download Citation

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

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