Yazar "Ünal, Ali Cem" için listeleme
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Adaptive backstepping approach for 2-DOF telescopes despite unknown wind disturbance
Ünal, Ali Cem; Yılmaz, Cemal Tuğrul; Kararsız, Gökhan; Yeşilyaprak, Cahit; Keskin, Onur (Institute of Electrical and Electronics Engineers Inc., 2019-07)Small ground telescopes on the marked are widely used in many space observatories and scientific researches. There are three main problems in such telescopes; positioning of the focal point and the need of tuning for both ... -
Advances for the 4m DAG Telescope in Flange derotator
Keskin, Onur; Ünal, Ali Cem; Koç, İlker Murat; Jolissaint, Laurent; Yeşilyaprak, Cahit (SPIE, 2020-12-13)The purpose of this study is expressing advances in design stages for in flange optical field derotator system for 4 meters DAG Telescope. In-Flange Derotator KORAY (K-mirror OpticalRelAY) is designed, analysed and ... -
In Flange Derotator Design for the 4m DAG telescope
Ünal, Ali Cem; Sarajlic, Mirsad; Jolissaint De Sepibus, Laurent; Keskin, Onur; Yeşilyaprak, Cahit; Baudet, Jeremie (SPIE-INT Soc Optical Engineering, 2018-07-06)The field rotation effect can be described as observing the gyration of an object with the pupil of the Eastern Anatolian Observatory (DAG) telescope around the optical axis under the influence of the latitude of the ... -
Mezunlarımızdan Ali Cem Ünal ile Konuştuk!
Ünal, Ali Cem; Işık Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü (Işık Üniversitesi, 2020-04-30)Işık Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü 2013 yılı mezunlarımızdan Ali Cem Ünal’ın mezun olduktan sonraki hayatı ve kariyerinin konuşulduğu videonun erişimidir. -
Modelling and simulation studies on adaptive controller for alt-azimuth telescopes despite unknown wind disturbance and mass
Keskin, Onur; Ünal, Ali Cem; Kararsız, Gökhan; Yılmaz, Tuğrul; Yeşilyaprak, Cahit (SAGE Publications, 2020-09-15)Numerous ground-based observatories are using small sized ground telescopes for scientific research purposes. The telescopes that are available on the market have three main problems. These issues can be listed as: positioning ... -
Wind disturbance cancellation for smaller alt-azimuth telescopes
Ünal, Ali Cem; Kararsız, Gökhan; Yılmaz, Cem Tuğrul; Keskin, Onur; Yeşilyaprak, Cahit (Universidad Nacional Autonoma de Mexico, 2019-10)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 ...