Quantification and improvement of the actuator effectiveness of an active damper for wind tunnel tests

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (18) : 166-175.

ZENG Kaichun1,OUYANG Yan1,2,KOU Xiping1,2,YU Li1,YANG Xinghua1

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Abstract

Improving actuator efficiency was one of the primary objectives of the active damper structural design. Considering the active damper for typical high-speed wind tunnel model, the characteristics of the dynamic system were obtained, and the deformation pattern of each component during the vibration control were extracted based on finite element method and modal experiments. Then, a simplified model was established for the dynamic system using control voltage of the piezoelectric stacks as the input, and a quantification method for the actuator efficiency was developed for structure design. Finally, regarding to a baseline active damper with double-hinge structure, the effects of the variations of the flexible hinges parameters on the actuator efficiency were studied, and the strategies for improving it were also obtained. The numerical simulation results show that the relationships between the actuator efficiency and the geometric parameters of the flexible hinges are all nonlinear and non-monotonic. However, when using the stiffness of the flexible hinges as design variables instead, approximate linear relationships can be achieved in the main design domain, which can provide easier way to design them.
Key words: wind tunnel test; model vibration; active vibration c

Key words

wind tunnel test / model vibration / active vibration c

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ZENG Kaichun1,OUYANG Yan1,2,KOU Xiping1,2,YU Li1,YANG Xinghua1. Quantification and improvement of the actuator effectiveness of an active damper for wind tunnel tests[J]. Journal of Vibration and Shock, 2022, 41(18): 166-175

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