Centrifugal compressor surge suppression using fuzzy logic control

Turbo gas compressors are among the most used machines ever invented. In the process industry, they are used intensively to provide compressed air for all types of pneumatic instruments and tools. These compressors suffer from an instability known as surge which usually occurs at low flow rates. The flow becomes seriously unstable and sometimes reverses. Surge has been a major problem for designers and users since the invention of the turbo-compressor. Although many successful echniques have been proposed to tackle the surge problem, most of them seem to offer to control at a single operating point or when nonlinear control is used the aethod tends to be seriously complex. The area remains very challenging for control engineers because of the non-linear nature of the phenomena and the complexity of the machine itself.EThOS - Electronic Theses Online ServiceGBUnited Kingdo