以橋梁模型為例， 利用鋯鈦酸鉛（PZT） 材料的動態響應特性， 當對PZT 驅動器施加一定頻率的激勵使被測構件產生振動的同時， 采集和識別PZT 傳感器信號， 即可實現其故障監測。該項技術的關鍵是，通過計算法和試驗法選取驅動器的激勵頻率， 獲取正常及故障狀態時的響應模型并建立故障識別數據庫， 然后用實際系統和故障識別數據庫中的數據進行比較， 從而確定系統是否發生故障及故障類別。
關 鍵 詞 ： 故障識別；PZT 材料； 固有頻率
Abstract: Taking bridge model as an example, according to the dynamic response characteristic of lead zirconate titanate (PZT) material, the PZT actuator executed exciting signal of particular frequency to vibrate the monitored component. At the same time, the signal of PZT sensor is collected and recognized to monitor its fault. The key point of this technology is that the exciting frequency of actuator is chosen with numeration and experimentation method to get response model of normal and abnormal, and database of
fault monitoring was built. Then, the data of actual component was compared with the data of database of fault monitoring to confirm if the component is abnormal and what type of the fault is.
Key Words: Fault recognizing; PZT material; Natural frequency