scholarly journals Robustness of Rotating Stall Control for Axial-Flow Compressors*

2003 ◽  
Vol 125 (3) ◽  
pp. 424-428 ◽  
Author(s):  
Ali Tahmasebi ◽  
Xiang Chen
Keyword(s):  
Axial Flow ◽  
Engine Performance ◽  
Rotating Stall ◽  
Stabilizing Controllers ◽  
Stable Operating ◽  
Uncertainty Set ◽  
The Stability ◽  
Stall Control ◽  
Admissible Uncertainty ◽  
Axial Flow Compressors

Feedback control has been pursued to address the rotating stall problem in axial flow compressors in order to extend the stable operating range and to improve engine performance. These controllers guarantee the stability of the bifurcated operating solution near the stall point. In this paper, an analytic approach is developed to characterize the robustness of some stabilizing controllers for rotating stall in axial-flow compressors. The numerical examples show that the size of the admissible uncertainty set changes for stabilizing controllers with different feedback gains. It is also proved that a nonlinear stabilizing control is not necessarily superior to a linear one.

Local L2 Gain of Axial Flow Compressor Control

2008 ◽  
Vol 131 (1) ◽  
Author(s):  
Tiebao Yang ◽  
Xiang Chen
Keyword(s):  
Axial Flow ◽  
Pressure Rise ◽  
Engine Performance ◽  
Rotating Stall ◽  
Robust Controller ◽  
Stabilizing Controllers ◽  
Stable Operating ◽  
Flow Compressor ◽  
Hamilton Jacobi Bellman ◽  
L2 Gain

Feedback control has been pursued to stabilize the bifurcated operating solution near the rotating stall point in axial-flow compressors. These controllers can extend the stable operating range and hence improve engine performance. However, the local L2 gain of these controllers still remains unknown. In this paper, a family of Lyapunov functions is first constructed, and then the local L2 gain is derived through Hamilton–Jacobi–Bellman inequality for a class of stabilizing controllers with throttle position as actuator and pressure rise as measurement. The results obtained in this paper provide useful guidance for selecting the most robust controller from a given class of stabilizing controllers in terms of L2 gain.

Rotating stall control for axial flow compressors

Automatica ◽  
2001 ◽  
Vol 37 (6) ◽  
pp. 921-931 ◽  
Author(s):  
Calin Belta ◽  
Guoxiang Gu ◽  
Andrew Sparks ◽  
Siva Banda
Keyword(s):  
Axial Flow ◽  
Rotating Stall ◽  
Stall Control ◽  
Axial Flow Compressors

Distributed Control of Rotating Stall in an Axial Flow Compressor With Actuator Constraints

2000 ◽  
Author(s):  
Craig A. Buhr ◽  
Matthew A. Franchek ◽  
Sanford Fleeter
Keyword(s):  
Absolute Stability ◽  
Closed Loop ◽  
Axial Flow ◽  
Gain Control ◽  
Rotating Stall ◽  
Control Law ◽  
Circle Criterion ◽  
Axial Flow Compressor ◽  
Flow Compressor ◽  
Stall Control

Abstract Presented in this paper is an analytical study evaluating the closed loop stability of rotating stall control in an axial flow compressor subject to a nonlinear spatial actuation constraint that limits the amplitude of a spatial mode input. Absolute stability of the rotating stall control system is investigated by applying the circle criterion to a linearized model of an axial compressor in series with the saturation element. This stability analysis is then used to design the gain and phase of the ‘classical’ complex gain feedback control law. Resulting is a systematic method for designing the parameters of the complex gain control law which increases the region of absolute stability guaranteed by the circle criterion for the closed-loop system.

Detection of Precursor Waves Announcing Stall in Two 3-Stage Axial Compressors

1998 ◽  
Author(s):  
F. Grauer ◽  
W. Volgmann ◽  
H. Stoff ◽  
T. Breuer
Keyword(s):  
Pressure Fluctuations ◽  
Safety Margin ◽  
Stability Limit ◽  
Rotating Stall ◽  
Time Dependent ◽  
Axial Compressors ◽  
Performance Map ◽  
Fourier Transform Methods ◽  
The Stability ◽  
Stall Control

Rotating stall and surge limit the operating range of a compressor towards low throughflow and high pressure in the performance map. Usually a safety margin must be observed to prevent the compressor from entering unintentionally aerodynamic instabilities. As the range of highest performance and efficiency lies in the vicinity of the stability limit, efforts concentrate on recognizing imminent onset of unstable operation prior to its occurrence. The present investigation centers on means of detecting information about onsetting instability from signals of pressure fluctuations in two transonic medium-pressure axial compressors of 3 stages. Fourier-transform-methods as well as artificial neural networks are applied for the data reduction of the time-dependent pressure signals. The methods of investigation presented here detected stall precursors announcing the onset of instability. Some of them seem appropriate to be used in connection with active stall control.

High-gain feedback control of rotating stall in axial flow compressors

Automatica ◽  
2002 ◽  
Vol 38 (6) ◽  
pp. 995-1001 ◽  
Author(s):  
Mahir A. Nayfeh ◽  
Eyad H. Abed
Keyword(s):  
Feedback Control ◽  
Axial Flow ◽  
High Gain ◽  
Rotating Stall ◽  
Axial Flow Compressors
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