In Situ Health Monitoring of Piezoelectric Sensors
On occasion, anomalies may appear in the highly dynamic test data obtained during rocket engine tests. These incidences are investigated, and a corrective action may be mandated before subsequent engine testing. The appearance of spurious signals of unknown cause is a typical challenge encountered in accelerometer data channels.
To address this issue, an in situ health monitoring apparatus, which includes (1) an exciter circuit that applies a pulse to a piezoelectric transducer and (2) a data processing system that determines the piezoelectric transducer’s dynamic response to the first pulse, was developed.
AST Electronics Engineer
NASA’s Stennis Space Center
Dr. Ramona Travis
NASA Stennis Space Center (SSC)