Abstract
In this paper, the dynamics of piezo-actuated stick–slip micro-drives are studied experimentally and theoretically. First, the stick–slip-based force-generating test stand is introduced, and experimental results are presented. Then, a numerical model is formulated which explicitly includes the dynamics of normal and tangential properties of the contact areas in the frictional driving elements of the drive. The contact forces are simulated using the method of dimensionality reduction. We show that the experimentally observed behavior can be described without using any fitting parameters or assuming any generalized laws of friction if the explicit contact mechanics of the frictional contacts is taken into account. Furthermore, an even simpler model of the drive is developed to get a qualitative understanding of the system. It is employed to gain a new actuation method, which reduces the vibrations of the drive’s runner and therefore enhances its performance.
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Nguyen, H.X., Teidelt, E., Popov, V.L. et al. Modeling and waveform optimization of stick–slip micro-drives using the method of dimensionality reduction. Arch Appl Mech 86, 1771–1785 (2016). https://doi.org/10.1007/s00419-014-0934-y
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DOI: https://doi.org/10.1007/s00419-014-0934-y