Smoothness and discontinuous (SD) oscillator is a nonlinear oscillator with the variable frequency, whose frequency can be varied with the smoothing parameter. However, how to adjust the smoothing parameter has not been solved in the actual device. In this paper, the shape memory alloy (SMA) is introduced into the SD oscillator to form the SMA-SD oscillator to adjust the smoothing parameters. Combining the SMA-SD oscillator with MRF, a nonlinear dynamic vibration absorber (DVA) with variable frequency and damping is designed. The structure and control principle of the designed DVA is studied to achieve the two variable characteristics simultaneously by adjusting the current intensity. Numerical results on a two-degree-of-freedom coupled system show that the proposed DVA can adapt to different working conditions only by adjusting the current intensity.

中文翻译：

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一种新型的可变频率和阻尼的动态吸收器

平滑和不连续（SD）振荡器是具有可变频率的非线性振荡器，其频率可以随平滑参数而变化。但是，在实际设备中尚未解决如何调整平滑参数。本文将形状记忆合金（SMA）引入SD振荡器中，以形成SMA-SD振荡器来调整平滑参数。结合SMA-SD振荡器和MRF，设计了具有可变频率和阻尼的非线性动态减振器（DVA）。研究了所设计DVA的结构和控制原理，以通过调节电流强度同时实现两个可变特性。