A NEW BALANCING APPROACH BASED ON ROBUSTNESS AND RELIABILITY
Vinícius Nunes Carvalho1; Arinan Dourado Guerra Silva1; Aldemir Ap Cavalini Jr.1; Valder Steffen Jr.1
1 UFU
Resumo
Uncertainty is an inherent feature of mechanical system, due to operational fluctuations, manufacturing errors or simple by lack of knowledge; and therefore is essential to evaluate its impacts in mechanical system responses. One of the most common malfunctioning observed in rotating machines is unbalance. Many procedures have been proposed in the last decades that handles unbalance. However, most of these procedures do not considered the effect of the uncertainties in the vibration response of the system. Therefore, in this contribution, a new balancing procedure is proposed based on an extension of the so-called IC method, in which the inherent uncertainties of the rotating system are modeled as fuzzy variables and the robustness and reliability of the resulting correction weights and phases are assured by optimization procedures. To illustrate the effectiveness of the proposed methodology, the balancing of a virtual rig composed of a flexible rotor, two rigid discs and two bearings (one roller bearing and one hydrodynamic bearing) was performed, and the robustness and reliability of the responses were evaluated.
Palavras-chave: Balancing; Fuzzy Logic; Robustness; Reliability