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Transactions: WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS
Transactions ID Number: 29-925
Full Name: Domenico Guida
Position: Professor
Age: ON
Sex: Male
Address: Ponte Don Melilo
Country: ITALY
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E-mail address: guida@unisa.it
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Title of the Paper: Sommerfeld and Mass Parameter Identification of Lubricated Journal Bearings
Authors as they appear in the Paper: Domenico Guida, Pappalardo Carmine Maria
Email addresses of all the authors: guida@unisa.it,cpappalardo@unisa.it
Number of paper pages: 10
Abstract: In this paper we propose a method for identification of two parameters that define the structure of lubricated journal bearings. In rotordynamics literature these parameters are named $\textit{Sommerfeld number}$ and $\textit{Mass Number}$, respectively. The system analyzed belongs to the class of systems that are described by $n$ nonlinear second order differential equations. We have obtained the analytical solutions of these equations using Lie series expansion. This method can be applied to a vast class of dynamical systems, provided that they are described by smooth equations. Lie series expansion is a mathematical tool that allows us to obtain the system response in recursive way using symbolic PC-codes. Besides, this procedure involves only a few experimental data and makes the identification process very quick. It is worth noting that the application that we propose does not take into account neither the issue connected to experimental data noise nor the una!
voidable disturbances that occurs in measurement process. Actually, in applied system identification one must always pay attention to the signal noise and to the robustness of the solution with respect to disturbances, but these issues are over the goal of this paper.
Keywords: Nonlinear System Identification, Parameter Identification, Lubricated Journal BearingsJ
EXTENSION of the file: .pdf
Special (Invited) Session: Journal Bearing Parameter Identification
Organizer of the Session: 614-447
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