The control switching adapter: a practical way to ensure bumpless switching between controllers while AO loop is engaged

Henri-François Raynaud; Caroline Kulcsár; Rémy Juvénal; Cyril Petit

doi:10.1117/12.2234266

27 July 2016 The control switching adapter: a practical way to ensure bumpless switching between controllers while AO loop is engaged

Henri-François Raynaud, Caroline Kulcsár, Rémy Juvénal, Cyril Petit

Author Affiliations +

Proceedings Volume 9909, Adaptive Optics Systems V; 99094K (2016) https://doi.org/10.1117/12.2234266
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Linear Quadratic Gaussian (LQG) control has gained significant ground in astronomical AO. On-line re-tuning of LQG while keeping the AO loop engaged is crucial to match changes in disturbance conditions. However, switching between AO controllers generates control "bumps" which may compromise stability and performance. Control bumps can be eliminated by adjusting the new controllers internal space to ensure maximum continuity of the control trajectory. In this work, we show how to implement this procedure in the case of a tip and tilt control loop using an additional piece of RTC software, the "control switching adapter".

Citation Download Citation

Henri-François Raynaud, Caroline Kulcsár, Rémy Juvénal, and Cyril Petit "The control switching adapter: a practical way to ensure bumpless switching between controllers while AO loop is engaged", Proc. SPIE 9909, Adaptive Optics Systems V, 99094K (27 July 2016); https://doi.org/10.1117/12.2234266

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