L1 Adaptive Control for a Vertical Rotor Orientation System
School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Author to whom correspondence should be addressed.
Academic Editor: Chien-Hung Liu
Received: 27 May 2016 / Accepted: 19 August 2016 / Published: 29 August 2016
Bottom-fixed vertical rotating devices are widely used in industrial and civilian fields. The free upside of the rotor will cause vibration and lead to noise and damage during operation. Meanwhile, parameter uncertainties, nonlinearities and external disturbances will further deteriorate the performance of the rotor. Therefore, in this paper, we present a rotor orientation control system based on an active magnetic bearing with
adaptive control to restrain the influence of the nonlinearity and uncertainty and reduce the vibration amplitude of the vertical rotor. The boundedness and stability of the adaptive system are analyzed via a theoretical derivation. The impact of the adaptive gain is discussed through simulation. An experimental rig based on dSPACE is designed to test the validity of the rotor orientation system. The experimental results show that the relative vibration amplitude of the rotor using the
adaptive controller will be reduced to ∼50% of that in the initial state, which is a 10% greater reduction than can be achieved with the nonadaptive controller. The control approach in this paper is of some significance to solve the orientation control problem in a low-speed vertical rotor with uncertainties and nonlinearities.
This is an open access article distributed under the Creative Commons Attribution License
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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MDPI and ACS Style
Liu, S.; Fan, Y.; Di, J.; Ji, M. L1 Adaptive Control for a Vertical Rotor Orientation System. Appl. Sci. 2016, 6, 242.
Liu S, Fan Y, Di J, Ji M. L1 Adaptive Control for a Vertical Rotor Orientation System. Applied Sciences. 2016; 6(9):242.
Liu, Sijia; Fan, Yu; Di, Jun; Ji, Mingming. 2016. "L1 Adaptive Control for a Vertical Rotor Orientation System." Appl. Sci. 6, no. 9: 242.
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