Abstract
In this paper, a nonlinear dynamics equation for a micro electromagnetic harmonic drive system is proposed considering nonlinearity caused by the molecule force applied to the flexible ring. Using the equations, the nonlinear resonant frequencies and the amplitude frequency characteristics of the drive system are investigated. Effects of the molecule force nonlinearity on the resonant frequencies and the amplitude-frequency characteristics and their changes along with system parameters are analyzed. Results show that the nonlinear effect of van der Waals forces on system vibration should be considered when the coil current and the radius of the flexible wheel are large, the thickness of the flexible wheel or the gap between the flexible wheel and the stator is small. The jump vibration zone of the flexible wheel reduces significantly with increasing the exciting current in the coil, the length of the flexible wheel, and the nonlinear parameter, or decreasing the thickness of the flexible wheel.
Zusammenfassung
In diesem Artikel werden die durch molekulare Kraft auf dem flexiblen Ring verursachte Nichtlinearität berücksichtigt und legt die nichtlineare dynamische Gleichung des mikro-elektromagnetischen harmonischen Übertragungssystems fest. Unter Verwendung dieser Gleichung wurden die nicht linearen Resonanzfrequenz- und Amplitudenfrequenzeigenschaften des Antriebssystems untersucht. Der Einfluss der molekularen Leistung auf die Resonanzfrequenz- und Amplitudenfrequenzeigenschaften und Änderungen ihrer Systemparameter. Die Ergebnisse zeigen, dass, wenn der Spulenstrom groß ist, die Dicke des weichen Rades oder der Spalt zwischen der Weichraddicke oder dem Weichrad und dem Stator, die nichtlinearen Effekte von Van Dewali auf die Systemvibration berücksichtigt werden. Mit der Erhöhung des Spulenanregungsstroms, der flexiblen Radlänge und der nichtlinearen Parameter oder der Verringerung der Dicke der flexiblen Räder nimmt die Schwingungszone der flexiblen Räder erheblich ab.
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Funding
This project is supported by National key R & D Program of China (No. 2018YFB1304800) and the Hebei Province Natural Science Foundation in China (No. E2017203021).
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Zhao, D., Xu, L. & Fu, Y. Nonlinear vibration for a micro electromagnetic harmonic drive system. Forsch Ingenieurwes 86, 769–779 (2022). https://doi.org/10.1007/s10010-022-00587-x
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DOI: https://doi.org/10.1007/s10010-022-00587-x