Artículos de revistas
Experimental determination of stiffness and damping in rotating systems using metaheuristic hybrid optimization and state observers
Fecha
2016-01-01Registro en:
Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 38, n. 1, p. 59-66, 2016.
1806-3691
1678-5878
10.1007/s40430-015-0413-6
2-s2.0-84952333708
2-s2.0-84952333708.pdf
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Recently, more research have been conducted on the analysis of the vibration response of rotors, so that new techniques, which are used to characterize the dynamic response of rotating machines, have been developed to aid and predict the lifespan of such systems. One of the vibration management techniques in rotating systems is the monitoring of stiffness and damping parameters of the bearings and system excitation forces. In this context, this paper aims to estimate the stiffness and damping of the bearings through a hybrid metaheuristic method. This uses a population-based search method as a starting point for direct search method, genetic algorithms and quasi-Newton method, respectively, in this work. The function to be minimized contains experimental bearing data. Moreover, the state observer is used to reconstruct all states of the system from the experimental data from the sensors. Thus, it is proposed to identify the excitation forces using orthogonal functions, Chebyshev polynomials specifically, and then, to verify the effectiveness of the method when compared to the calculated force excitation of the system.