一种用于求压电材料复参数的快速迭代算法

A Fast Iterative Method for Complex Parameters of Piezomaterials

要精确地描述压电材料的性能，必须把压电材料的参数作为复数考虑。文章提出一种新的自动迭代算法，通过测量压电陶瓷的４种标准型振子谐振峰附近的阻抗（或导纳），即可由程序自动求出压电陶瓷的全部材料系数。与常用的迭代法相比，本文迭代法巧妙的初值选取方法及选代频率点的选择，使得算法精度高，迭代次数少。

The material parameters of piezoceramics must be considered as complex for describing accurately the performance of piezoceramics.A new automatic iterative method for evaluating the complex material parameters of piezoceramics is described. All of the parameters inpiezoceramics can be determined when the impedance values (or admittance values) were measuredin the range of including fundamental resonance and anti-resonance for four standard resonatorseparately. This method is more accurate than commonly used arithmetic's and the number of iteration is less, for the gimmicky initial estimation method and iterative frequencies, futhermore,the frequencies selection are determined automatically by software.