ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Test investigation on vibration control of intelligent beam with shape memory alloy
Received date: 2014-09-09
Revised date: 2014-11-04
Online published: 2014-11-06
Supported by
National Natural Science Foundation of China (51105022, 51475021)
Shape memory alloy (SMA) has been successfully applied to variable stiffness vibration control of intelligent beam based on the characteristics of elastic modulus changing with temperature significantly. The steady and transient response is restrained using a correct control strategy according to the variable stiffness control theory. The data obtained have demonstrated that Ti50Ni41Cu9 shape memory alloy has much higher rate of thermal response, and the elastic modulus changed sharply under temperature control up to four times; the first three-order natural frequencies could be regulated significantly when the SMA is fixed at the root of the beam; the resonant response is attenuated by changing the temperature of SMA, and the influence of stiffness varying rate on the nonlinear characteristics and control effect is analyzed; by developing a temperature loading method, the wide-band transient vibration response is controlled in the process of exciting force variation. The results show that the natural frequencies of the beam can be changed effectively by variable stiffness control over the SMA, and the vibration performance will be affected. Nonlinear characteristics generating in the process of stiffness varying through the resonance frequency can disperse vibration energy of the main frequency, and the faster variation rate contributes to restraining the vibration response more effectively.
YANG Xin , HONG Jie , MA Yanhong , ZHANG Dayi . Test investigation on vibration control of intelligent beam with shape memory alloy[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015 , 36(7) : 2251 -2259 . DOI: 10.7527/S1000-6893.2014.0302
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