Eliminating whirl occurrence in fluid-film bearings of rotary machinery through optimally controlled anti-swirl injection

Duc-Do Le; Ching-Kuan Tsuei; Min-Chun Pan

doi:10.1117/12.2046166

9 March 2014 Eliminating whirl occurrence in fluid-film bearings of rotary machinery through optimally controlled anti-swirl injection

Duc-Do Le, Ching-Kuan Tsuei, Min-Chun Pan

Author Affiliations +

Proceedings Volume 9057, Active and Passive Smart Structures and Integrated Systems 2014; 905736 (2014) https://doi.org/10.1117/12.2046166
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

The phenomenon of fluid-induced instability existing in fluid-film bearing systems has been coped with for long time. The study aims to soothe and even eliminate the occurrence of whirl in rotary machinery by increasing the threshold of instability through the anti-swirl injection using an optimal control based linear quadratic regulator. An acceptance region was established in order to decide starting up the control process. Some case studies were carried out to illustrate the effectiveness of the control scheme. The research results present that a simple control method incorporating with an acceptance region enables to avoid the fluid induced instability flexibly in rotary machinery. Moreover, the developed techniques can also be applied in other fluid-induced instability problems such as whip and rub, etc.

Citation Download Citation

Duc-Do Le, Ching-Kuan Tsuei, and Min-Chun Pan "Eliminating whirl occurrence in fluid-film bearings of rotary machinery through optimally controlled anti-swirl injection", Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 905736 (9 March 2014); https://doi.org/10.1117/12.2046166

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