Open AccessGPIO‐based robust control of magnetic levitation system subject external disturbance
Author(s) -
Lan Qixun,
Cai Yujie,
Liu Yamei,
Xu Huafeng,
Yang Yuqian,
Li Yanan
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.1064
Subject(s) - control theory (sociology) , magnetic levitation , disturbance (geology) , levitation , tracking (education) , position tracking , robust control , controller (irrigation) , simple (philosophy) , computer science , observer (physics) , position (finance) , control (management) , control system , control engineering , magnet , engineering , physics , artificial intelligence , actuator , biology , psychology , paleontology , quantum mechanics , agronomy , mechanical engineering , finance , electrical engineering , economics , pedagogy , philosophy , epistemology
This article considers the robust control problem of non‐linear magnetic levitation system with parameter uncertainties and external disturbance. To obtain a simple and practical controller that does not depend on the exact model information, a generalised‐proportional‐integral observer is constructed to estimate the velocity and disturbance. Then, based on mild assumptions and the estimated values, an output feedback tracking controller is proposed such that the reference position tracking task could be realised. The obtained control approach is confirmed strictly by theoretical analysis. Finally, simulation results are provided to show the effectiveness of the proposed control method.