Telescope control system stability study using a variable structure controller

Dario Mancini; Enrico Cascone; Pietro Schipani

doi:10.1117/12.308804

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26 May 1998 Telescope control system stability study using a variable structure controller

Dario Mancini, Enrico Cascone, Pietro Schipani

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Proceedings Volume 3351, Telescope Control Systems III; (1998) https://doi.org/10.1117/12.308804
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

The performance of on Alt-Az telescope depend strongly on its operating conditions. During tracking Alt-Az telescopes generally move slow but in some cases the dynamic range is large. Anyway the position errors must always be as close as possible to zero. A fixed structure controller cannot optimize the telescope performance in terms of error amount in the whole requested dynamic range. On the contrary a digital controller has the ability to modify its structure and its parameter values during operations, according to the instantaneous error values, system status, system actual sped and system characterization. This paper analyzes the problem of stability using such a variable structure controller in a case study.

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Dario Mancini, Enrico Cascone, and Pietro Schipani "Telescope control system stability study using a variable structure controller", Proc. SPIE 3351, Telescope Control Systems III, (26 May 1998); https://doi.org/10.1117/12.308804

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