Abstract
To improve the vibration control performance of dynamic vibration absorber (DVA), various multi dynamic vibration absorbers have been introduced for several years. Although the multi DVAs are better than single-mass DVA in vibration control performance with the same mass ratio, their vibration control effects are also very sensitive to the change of natural frequency of the controlled object same with single-mass DVA. In this paper, a new robust optimal design method has been proposed for improving the robustness of multi DVAs in vibration control performance. Optimal parameters of the two-series-mass DVA, two-parallel-mass DVA and four-parallel-mass DVA have been calculated and optimal design diagrams and approximate formulas are conducted. Robustness of vibration control performance is analyzed with the simulation and experiment. The results show the robust design method is better than conventional compliance optimal design method in robustness of vibration control performance.
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