Stage M2 – Remaining Useful Life estimation with Structural Health Monitoring: Application to ultrasonic guided waves measurements
Structural Health Monitoring (SHM) can be defined as a process of implementing a nondestructive damage identification strategy for engineering infrastructures, such as an aircraft, pipeline or nuclear power plant, usually by permanently installing a network of sensors. SHM systems can detect the appearance and monitor the progression of defects (corrosion, delamination, etc.) with continuous monitoring. One physical phenomenon that enables defects to be detected is the use of guided elastic waves propagating through the structure, emitted and detected by thin piezoelectric sensors or fiber optic sensors embedded in the material or bonded to its surface. Usually, guided wave signals are analyzed in comparison to their previous state (baseline measurements) to detect defects. The advanced imaging algorithms such as delay and sum and RAPID applied to guided wave signals can determine the location of the anomalies.
Remaining Useful Life (RUL) is an engineering tool designed to enable condition-based maintenance of systems and prevent their catastrophic failure. It is based either on comprehensive physical degradation models of the monitored systems, statistical models based on available data from similar systems, or a combination of both. Most of the academic research in this area is focused on the dynamic behavior of industrial machinery, and the use of ultrasonic guided waves still needs to be investigated further.
More informations on the link below.