根据作用于圆窗的压电式振动声桥的工作原理,本文建立了压电振子与圆窗耦合的动力学模型,由此推导出该模型的电-机能量转化的传递函数。通过在Matlab环境中进行仿真试验,讨论了压电应变常数、振子支座质量及支座刚度等参数对传递函数的影响,并分别优化了各个参数。研究结果为新型振动压电植入振子的研制奠定了理论基础。
According to the operating principle of piezoelectric vibrant soundbridge, the paper build the dynamic model which couple the piezoelectric transducer and round window in inner ear, and deduced the electron-mechanical transfer function of the model. Through simulating experiments in Matlab, the parameters influenced the system such as piezoelectric deformation constant, support mass, support stiffness were discussed and optimized. The results assigned the theoretical basis in the development of a new piezoelectric vibrant soundbridge.