A novel compensating approach for self-sensing Maglev system with controlled-PM electromagnets

Author

Tzeng, Yeou-Kuang ; Wang, Tsih C.

Author_Institution

Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

4208

Lastpage

4210

Abstract

This paper describes a novel compensating approach for a self-sensing (gap sensor free) Maglev system with controlled PM electromagnets. The proposed compensator consists of two parts: a hybrid observer; and a robust controller. The hybrid observer, combining a reduced-order observer and an external force observer, can estimate the steady-state gap variation even with payload change. A new reaching law-based variable structure control method is employed to the robust controller synthesis for enhancing system stability. The performance of the overall compensator is tested with a single-degree-of-freedom Maglev system. Results obtained indicate the good response of the proposed compensating scheme

Keywords

compensation; control system synthesis; electromagnets; magnetic levitation; observers; permanent magnets; robust control; self-adjusting systems; stability; variable structure systems; compensating approach; control design; controlled PM electromagnets; controller synthesis; degree-of-freedom; external force observer; hybrid observer; payload change; performance; reaching law-based variable structure control; reduced-order observer; response; robust controller; self-sensing Maglev system; steady-state gap variation; system stability; Control systems; Electric variables control; Electromagnets; Force sensors; Magnetic levitation; Robust control; Robust stability; Sensor phenomena and characterization; Sensor systems; Steady-state;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.489928

Filename

489928