悬臂梁基板对压电纤维复合物驱动性能的影响

Piezoelectric fiber composites have important application in the field of actuation, sensing, structural health monitoring and etc. It is important to study the actuation characteristics of piezoelectric fiber composites for a range of applications. The influences of driving voltage conditions (peak-to-peak voltage, frequency, bias) on the actuation characteristics of piezoelectric fiber composites were studied. The influence of different type of substrates on the actuation characteristics of piezoelectric fiber composites were studied through the tip displacement of the cantilever, which was also used to calculate the blocking force based on Euler-Bernoulli beam theory. The results showed that the hysteresis existed. The tip displacement of the cantilever had a linear relationship with the driving voltage amplitude, and also was influenced by the driving voltage bias and frequency. The actuation characteristics of the piezoelectric fiber composites differed with different substrates. The blocking force for aluminum-based substrate was 5.2 mN, while it was 0.2 mN for mylar-based substrate.