Author: J. V. PrasadPublisher:
ISBN:
Category :
Languages : en
Pages : 10
Book Description
Approaches for active control of surge in axial and centrifugal compressors are based for their majority on sensing them after they occur and then taking appropriate action. On the other hand some studies in the past have showed that precursors to surge exist in some cases. But very few studies have actually made use of precursors for active control. In this paper we show experimentally that surge precursors exist in centrifugal compressors. Further we formulate a novel control scheme in which a real time observer is used for on-line identification of magnitude and frequency of dominant precursor waves. The observer outputs feed into a fuzzy logic control scheme and the identified frequency and amplitude of the precursors are used to actuate a bleed valve and/or a feel valve for active control of compressor surge. Experimental results demonstrating the viability of the overall scheme are presented.
