Open AccessWIND DISTURBANCE CANCELLATION FOR SMALLER ALT-AZIMUTH TELESCOPES
Author(s) -
Ali Cem Ünal,
Gökhan Kararsız,
Cemal Yılmaz,
Onur Keskin,
Cahit Yeşilyaprak
Publication year - 2021
Publication title -
revista mexicana de astronomía y astrofísica. serie de conferencias
Language(s) - English
Resource type - Journals
ISSN - 1405-2059
DOI - 10.22201/ia.14052059p.2021.53.07
Subject(s) - azimuth , disturbance (geology) , control theory (sociology) , controller (irrigation) , amplitude , telescope , lyapunov function , altitude (triangle) , physics , computer science , geology , optics , mathematics , nonlinear system , geometry , paleontology , agronomy , control (management) , quantum mechanics , artificial intelligence , biology
This study focuses on eliminating unknown amplitude wind disturbance for 2-DOF alt-azimuth configuration small telescopes. An adaptive controller is designed to overcome wind disturbance as a set and forget system. The mathematical model is derived based on 2-DOF alt-azimuth configuration. The wind disturbance is modeled as a sum of sinusoidal with unknown amplitude, frequency and phase by using Wind-Gust model. The controller aims to cancel the effect of the disturbance on the altitude and azimuth angles of the telescope while positioning or staying static on a dedicated configuration. The asymptotic stability is proven with the Lyapunov approach. The numerical study is illustrated to success of the proposed controller.