用压电元件实时监测与识别板件结构约束刚度的变化

Monitoring and Identifying the Variation of Restrain Stiffness in Plates with Piezoelectric elements

动力系统在运行过程中，会产生诸如结构约束的松驰，内部裂纹的出现等问题。这些问题会引起结构动态特性的变化。将压电陶瓷片布置在结构表面，可以监测其动态特性及其变化，进一步辅以计算机人工神经网络技术，可以识别引起结构动态特性变化的原因和约束松驰的位置。

in Dynamic Systems,problems such as restrain relax, interior crack,often occur in operation process,which would make structure dynamic properties vary. Using piezoelectric sensor on plate's surface, the variation of the properties can be detected in real time. Furthermore,Applying artifical neural networks technology,the causes of the variation and the position of the restrain relex can be identified.