کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6753284 | 1430811 | 2018 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A Stewart isolator with high-static-low-dynamic stiffness struts based on negative stiffness magnetic springs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
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![عکس صفحه اول مقاله: A Stewart isolator with high-static-low-dynamic stiffness struts based on negative stiffness magnetic springs A Stewart isolator with high-static-low-dynamic stiffness struts based on negative stiffness magnetic springs](/preview/png/6753284.png)
چکیده انگلیسی
In order to improve the isolation performance of passive Stewart platforms, the negative stiffness magnetic spring (NSMS) is employed to construct high static low dynamic stiffness (HSLDS) struts. With the NSMS, the resonance frequencies of the platform can be reduced effectively without deteriorating its load bearing capacity. The model of the Stewart isolation platform with HSLDS struts is presented and the stiffness characteristic of its struts is studied firstly. Then the nonlinear dynamic model of the platform including both geometry nonlinearity and stiffness nonlinearity is established; and its simplified dynamic model is derived under the condition of small vibration. The effect of nonlinearity on the isolation performance is also evaluated. Finally, a prototype is built and the isolation performance is tested. Both simulated and experimental results demonstrate that, by using the NSMS, the resonance frequencies of the Stewart isolator are reduced and the isolation performance in all six directions is improved: the isolation frequency band is increased and extended to a lower-frequency level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 422, 26 May 2018, Pages 390-408
Journal: Journal of Sound and Vibration - Volume 422, 26 May 2018, Pages 390-408
نویسندگان
Yisheng Zheng, Qingpin Li, Bo Yan, Yajun Luo, Xinong Zhang,