DocumentCode :
3427809
Title :
Design and implementation of a surge controller for an AMB supported compressor in the presence of piping acoustics
Author :
Yoon, Se Young ; Lin, Zongli ; Allaire, Paul E.
Author_Institution :
Brown Dept. of Electr. & Comput. Eng., Univ. of Virginia, Charlottesville, VA, USA
fYear :
2011
fDate :
12-15 Dec. 2011
Firstpage :
1627
Lastpage :
1632
Abstract :
Active control of compressor surge using the thrust Active Magnetic Bearing (AMB) for unshrouded centrifugal compressors is revisited here. Based on a recently presented enhanced compression system model with variable impeller tip clearance and pipeline acoustics, a surge controller is designed. This controller calculates the command clearance between the impeller and the static shroud to create the necessary pressure modulation in the system to suppress the surge instability. The commanded impeller clearance is later fed to the thrust AMB to actuate the axial position of the compressor rotor. The proposed surge control method is derived and implemented on an experimental compressor setup, and test results for the surge controller are presented in this paper. Observations from the experimental surge testing demonstrate that the presented method is able to stabilize the compression system when operating in the unstable surge region, extending the stable flow range by over 21%. Also the derived controller shows good robustness to the internal AMB dynamics.
Keywords :
acoustics; actuators; compressors; impellers; magnetic bearings; modulation; pipelines; pipes; rotors; surges; active control; axial position actuation; command clearance; commanded impeller clearance; compression system stability; compressor rotor; compressor surge; enhanced compression system model; experimental compressor setup; internal active magnetic bearing dynamics; pipeline acoustics; piping acoustics; pressure modulation; static shroud; surge controller design; surge instability suppression; thrust active magnetic bearing; unshrouded centrifugal compressor; variable impeller tip clearance; Equations; Impellers; Mathematical model; Rotors; Steady-state; Surges; Valves;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Decision and Control and European Control Conference (CDC-ECC), 2011 50th IEEE Conference on
Conference_Location :
Orlando, FL
ISSN :
0743-1546
Print_ISBN :
978-1-61284-800-6
Electronic_ISBN :
0743-1546
Type :
conf
DOI :
10.1109/CDC.2011.6160525
Filename :
6160525
Link To Document :
بازگشت