Open AccessRadial position control for magnetically suspended high‐speed flywheel energy storage system with inverse system method and extended 2‐DOF PID controller
Author(s) -
Chen Liangliang,
Zhu Changsheng,
Zhong Zhixian,
Wang Changkun,
Li Zhig
Publication year - 2020
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2019.0512
Subject(s) - control theory (sociology) , pid controller , magnetic bearing , robustness (evolution) , flywheel , engineering , control system , rotor (electric) , inverse system , control engineering , inverse , computer science , mathematics , control (management) , temperature control , geometry , electrical engineering , artificial intelligence , mechanical engineering , biochemistry , chemistry , gene , aerospace engineering
To achieve high‐precision position control for the active magnetic bearing high‐speed flywheel rotor system (AMB‐HFRS), a novel control strategy based on inverse system method and extended two‐degree‐of‐freedom (2‐DOF) proportional–integral–derivative (PID) controller is proposed in this study. First, the inverse system method is employed to decouple the AMB flywheel rotor system with strong non‐linear and coupling, into four independent subsystems. Subsequently, extended 2‐DOF PID controllers are used to regulate the decoupled subsystems, to obtain good performances of disturbance rejection and tracking simultaneously. In the extended 2‐DOF PID controller, a differential signal is produced by a velocity observer to improve the ability of against noise. Finally, the characteristics of stability, tracking, disturbance rejection and robustness of the control strategy proposed are analysed in theory, and its ability and effectiveness to control the radial position of the AMB‐HFRS are further studied by simulations and experiments. It is shown that the control strategy proposed can keep the AMB‐HFRS suspending stably from static state to the speed of 24,000 rpm, has the advantages of good tracking, high disturbance rejection, strong robustness and good ability of against noise.