Fixed-order data-driven H-infinity controller synthesis for flexible mechanical systems: Two-stage approach
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL, cilt.43, sa.8, ss.1722-1733, 2021 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 43 Sayı: 8
- Basım Tarihi: 2021
- Doi Numarası: 10.1177/0142331220940934
- Dergi Adı: TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, DIALNET, Civil Engineering Abstracts
- Sayfa Sayıları: ss.1722-1733
- Anahtar Kelimeler: Flexible mechanical systems, data-driven control, H-infinity control, open-loop system identification, stabilized platforms, VIBRATION CONTROL
- Hacettepe Üniversitesi Adresli: Evet
Özet
In this paper, a two-stage method is introduced to design fixed-order data-driven H-infinity controller for flexible mechanical systems. In the first stage of the proposed method, unknown parameters of anti-resonance filter that is added to the forward path of the control loop of the system to minimize resonant peaks, are calculated using frequency domain data obtained from open-loop system identification tests. In the second stage, a fixed-order data-driven H-infinity controller is calculated by solving an optimization problem under convex H-infinity constraints obtained based on the Nyquist diagram. With the proposed method, lower order controllers that meets the performance constraints of classical model-based H-infinity problems can be synthesized without need of a parametric plant model. The method developed in this study is tested experimentally on a military stabilized platform and its performance is compared with a model-based H-infinity controller design method.