Determining allowable parametric uncertainty in an uncommon quadrotor model for closed loop stability
TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, cilt.30, sa.3, ss.695-712, 2022 (SCI-Expanded, Scopus, TRDizin)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 30 Sayı: 3
- Basım Tarihi: 2022
- Doi Numarası: 10.3906/elk-2105-142
- Dergi Adı: TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, Compendex, Computer & Applied Sciences, INSPEC, TR DİZİN (ULAKBİM)
- Sayfa Sayıları: ss.695-712
- Anahtar Kelimeler: Parameter uncertainty, sensitivity analysis, quadrotor, structured singular value, unmanned aerial vehicle
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
In this article, control oriented uncertainty modeling of an uncommon quadrotor in hover is discussed. This quadrotor consists of two counter-rotating big rotors on longitudinal axis and two counter-rotating small tilt rotors on lateral axis. Firstly, approximate linear model of this vehicle around hover is obtained by using Newton-Euler formulation. Secondly, specific uncertainty is assigned to each parameter. Resulting uncertain model is converted into a linear fractional transformation framework for robustness analysis. Next, the most critical uncertain parameters in terms of robust stability in a proposed quadrotor model are investigated using mu sensitivities. Finally, skewed-mu analysis determines maximum possible uncertainty bounds for model parameters that are difficult to identify accurately.