Modeling control systems for primary mirror supports

Martin Fisher; Jaque Haque; John D. Wilkes; Clive S. Amos; Darrin J. Steel

doi:10.1117/12.211455

8 June 1995 Modeling control systems for primary mirror supports

Martin Fisher, Jaque Haque, John D. Wilkes, Clive S. Amos, Darrin J. Steel

Proceedings Volume 2479, Telescope Control Systems; (1995) https://doi.org/10.1117/12.211455
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

The RGO is involved in a number of mirror support programs, ranging from new controllers for its existing Isaac Newton Group (ING) telescopes to new primary mirror supports for the UK Infra-red Telescope (UKIRT) and design proposals for the active support of the Gemini 8 m meniscus mirrors. This work has led to the identification or development of critical components such as load cells and control valves which have high precision and stability. Even so it is still necessary to develop servo controllers capable of minimizing the effects of non- linearity and maintaining stability, particularly in regard to the highly non-linear behavior of pneumatic supports. In order to predict the performance of mirror supports and compare differing control strategies, components and systems are modelled using Matlab^R and Simulink^R. These models are presented, together with parameters derived experimentally, and results from recent laboratory tests are discussed. Specific applications are described and current status of the work at the time of submission is presented.

Citation Download Citation

Martin Fisher, Jaque Haque, John D. Wilkes, Clive S. Amos, and Darrin J. Steel "Modeling control systems for primary mirror supports", Proc. SPIE 2479, Telescope Control Systems, (8 June 1995); https://doi.org/10.1117/12.211455

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