As result of increase of customers� demands, products becomemore complexes and dynamics control increased its role into product\ndevelopment. As example, clothing washing machines use LeBlanc balancers in order to reduce vibration issues. Nevertheless, the\nbehaviour of such apparatus is still hard to describe and the numerical simulation of this sort of vibration control is based on\nball rings. The main goal of this work is to define and characterize a numerical model that describes the hydrodynamics balance\nring in the transient state in addition to steady state models. As consequence, the behaviour of balance ring was identified in a\ncomputational fluid dynamics tool and an equation that describes restoration forces, unbalance, force phase, and eccentricity was\nfound.
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