Dynamic Frequencies Correction in Piezoelectric Transducers using Genetic Algorithms

Abstract The performance of piezoelectric transducers is affected by variation of the acoustic loads. Correction of the excitation frequency are needed to maintain the performance. This paper presents an algorithm for dynamic correction of the operating frequency based on adaptive systems able to correct the frequency applying artificial intelligence techniques to a survey of impedance profiles. When the impedance is changed, a searching of similar values is performed in previously stored files and an iterative process finds the final frequency closer to the original impedance for the required performance. Simulations has been carried out using electric models. The results show the system is robust and the average response time is 6 ms.