Aircraft structures, whether metallic or composite, are subject to service damage which requires their periodic inspection and maintenance. While taking the aircraft out of service is quite costly, the assurance of structural integrity requires such inspection – and possible repair work based on the inspection results obtained. If damage is detected from an inspection, the decision whether to r...

Despite advances in health monitoring systems, the certification process for automated SHM systems remain rooted in the probability of detection (POD). POD is a fundamental part of the certification process, however, it is not the only measure of system validity. The process to certify a system must contain measures of accuracy and reliability. Disclosing the accuracy and reliability at the tim...

Structural health monitoring has been one of particular concerns of the engineering community. Effective monitoring, reliable data analysis, rational data interpretation and correct decision making are challenging problems for engineers who specialized in structural health assessment field. Concrete structures were constructed for various purposes in a certain design life in the context of 'mai...

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In this system, the problem of damage detection is formulated as an inverse problem. Solving the inverse problem, it is possible to obtain the damage location and degree. Evolutionary computing is applied to solve the damage problem. PSO-GA, based on Particle Swarm Optimization (PSO) and Genetic Algorithms (GA), is used to solve the problem. Furthermore, Improved PSO-GA is proposed here, which ...

Permanently mounted ultrasonic sensors are a key component of systems under development for structural health monitoring. Signal processing plays a critical role in the viability of such systems due to the difficulty in interpreting signals received from structures of complex geometry. This paper describes a differential feature-based approach to classifying signal changes as either “environmen...

The goals of seismic impact assessment can be achieved by seismic monitoring systems and seismic impact simulator. Seismic monitoring system, for the purpose of hazard analysis, local site effects analysis, vulnerability analysis, and estimation of loss, is one application of SHM in earthquake engineering. A prototype, conceptual seismic impact simulator integrating SHM, FEM, GIS, and Virtual R...

Detection of early warning signals for the imminent failure of large and complex engineered structures is a daunting challenge with many open research questions. In this paper we report on novel ways to perform Structural Health Monitoring (SHM) of flood protection systems (levees, earthen dikes and concrete dams) using sensor data. We present a robust data-driven anomaly detection method that ...