Dynamic Identification of the Rotor-Tilting Pad Bearing With Electromagnetic Actuators

• Grant number: 10/16428-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: December 01, 2010
• End date: November 30, 2011
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Rodrigo Nicoletti
• Grantee: Vanessa Brandt Perez
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

Tilting pad bearings with electromagnetic actuators are a new generation of hybrid active bearings, where the hydrodynamic lubrication supports the rotor and electromagnetic actuators control rotor lateral vibration. The efficiency of the control system can be verified by its ability to change the bearing dynamic characteristics, represented by the dynamic coefficients. However, there are several identification techniques available in literature. This project aims at studying three different identification techniques, applied to the passive case bearing (without control). Hence, one expects to fully understand the advantages and disadvantages of such techniques in order to identify the dynamic coefficients of the active case bearing (with control) with the best method.