Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Stepped Sine and Multisine Signal Excitation for Identification in a Small AMB Test Rig
Submission Author:
Diego Alejandro Godoy Diaz , RJ
Co-Authors:
Fernando Augusto de Noronha Castro Pinto, Thiago Ritto, David Julian Gonzalez Maldonado, Diego Alejandro Godoy Diaz
Presenter: Diego Alejandro Godoy Diaz
doi://10.26678/ABCM.COBEM2017.COB17-0414
Abstract
Due to contactless ability and versatile excitation signals interface for identification purposes, Active Magnetic Bearings (AMBs) have become in the last 30 years an interesting tool for supporting and assessing heavy rotating machines, like turbochargers and generators. Pure harmonic signals for excitation are useful in identification because their energy is concentrated in the excited frequency, but nevertheless it demands a longer time than broadband signals. On the other hand, the limitation of the latter signals is the low Signal to Noise Ratio at high frequencies. The variables measured in AMBs are commonly the coil currents and shaft positions. In this paper, a comparison between experimental FRFs obtained using a Stepped sine and several Multisine input excitations in a small previously developed AMB test rig is made.
Keywords
Active magnetic bearing, System Identification, Broadband Excitation
