A Development Strategy for Structural Health Monitoring Applications

Abstract Permanently installed structural health monitoring (SHM) systems are now a viable alternative to traditional periodic inspection (nondestructive testing (NDT)). However, their industrial use is limited, and this article reviews the steps required in developing practical SHM systems. The transducers used fixed location, whereas NDT, they generally scanned. aim reach similar performance with high temporal frequency, low spatial frequency data that achievable conventional NDT inspections. It shown can be done via change tracking algorithms such as generalized likelihood ratio (GLR), but depends on input being normally distributed, which only achieved if signal changes due variations operating conditions satisfactorily compensated; there has been much recent progress topic, reviewed. Since generate large volumes of data, it essential convert actionable information, step must addressed system design. also validate systems, methodology analogous model-assisted probability detection (POD) (MAPOD) scheme proposed. This uses measurements obtained from typical undamaged structure capture environmental other effects superpose damage growth finite element predictions. There substantial research agenda support wider adoption SHM, discussed study.