Application of FIDF to the detection of unstable behaviors in compression systems

Yew-Wen Liang, Der-Cherng Liaw, Yung Chun Wu

Research output: Contribution to journalArticlepeer-review


Issues concerning the detection of surge and rotating stall in a compression system are studied in this paper. It is observed that the plenum pressure rise and mass flow rate of a compression system exhibit abrupt change due to the appearance of surge or rotating stall, while those of it's linearized model do not. With this observation, a linear-based fault identification filter (FIDF) design technique is proposed to detect these two instabilities. This is achieved by treating the difference between the output of the compression system and that of its linearized model at an unstalled operating point as a fault vector and then investigating the effect of the fault on the designed FIDF. Simulation results for Moore and Greitzer's compression model [14] are given to demonstrate the effectiveness of the proposed scheme. The study may provide a means of detecting the occurrence of unstable phenomena at the onset so that a corrective action can be made.

Original languageEnglish
Article number912044
Pages (from-to)1347-1351
Number of pages5
JournalProceedings of the IEEE Conference on Decision and Control
StatePublished - 12 Dec 2000

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