A prerolling behavior called 'nonlinear spring behavior' (NSB) is exhibited in rolling elements, such as linear roller guideways, ball screws and ball bearings, before they begin to roll. Devices using these elements vibrate easily at small displacements due to NSB. The frequency response caused by NSB is different from those caused by rolling in the large displacement area. In this paper a study is carried out to characterize NSB and to explain its influence on frequency response using the case studies of a linear ball guideway, a DC servomotor, and a practical positioning device. [References: 11]
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