Real-Time Structural Health Monitoring of Vibrating Systems

Targeted at researchers and practitioners in the field of science and engineering, the book provides an introduction to real time structural health monitoring. Most work to date is based on algorithms that require windowing of the accumulated data, this work presents a coherent transition from the traditional batch mode practice to a recently developed array of recursive approaches. The book mainly focuses on the theoretical development and engineering applications of algorithms that are based on first order perturbation (FOP) techniques. The development of real time algorithms aimed at identifying the structural systems and the inflicted damage, online, through theoretical approaches paves the way for an in-depth understanding of the discussed topics. It then continues to demonstrate the solution to a class of inverse dynamic problems through numerically simulated systems. Extensive theoretical derivations supported by mathematical formulations, pivoted around the simple concepts of eigenspace updates, forms the key cornerstone of the book. The output response streaming in real time from multi degree of freedom systems provide key information about the system's health that is subsequently utilized to identify the modal parameters and the damage, in real time. Damage indicators connotative of the nature, instant and location of damage, identified in a single framework are developed in the light of real time damage case studies. Backed by a comprehensive assortment of experimental test-beds, this book includes demonstrations to emulate real life damage scenarios under controlled laboratory conditions. Applicability of the proposed recursive methods towards practical problems demonstrate their robustness as viable candidates for real time structural health monitoring.

Basuraj Bhowmik is an active researcher in the field of real-time built infrastructure health assessment and wind turbine monitoring. Overall, his work established and advanced the field of real-time detection through a comprehensive treatment of first-order eigen perturbation systems. He is presently working as an Assistant Professor in the Department of Civil Engineering, GITAM School of Technology, Bengaluru, India. Budhaditya Hazra is an Associate Professor in the Department of Civil Engineering, Indian Institute of Technology, Guwahati. He is an active researcher in the area of structural health monitoring. Dr Hazra has more than fifteen years of research experience in all aspects of vibration engineering including modal analysis and testing, stochastic dynamics, earthquake engineering, and sensing and inspection technologies. Vikram Pakrashi is an Associate Professor in UCD School of Mechanical and Materials Engineering. He is the Director of UCD Centre for Mechanics and active in Science Foundation Ireland centre MaREI and UCD Energy Institute. Vikram remains active in the topic of dynamics and its applications in built infrastructure systems.

PART: I 1. Introduction 2. Mathematical Preliminaries 3. Single-sensor Real Time Damage Detection Techniques: RSSA and its Variants 4. Multi-sensor Real Time Damage Detection Techniques (A): RPCA 5. Multi-sensor Real Time Damage Detection Techniques (B): RPCA-TVAR 6. Multi-sensor Real Time Damage Detection Techniques (B): Real Time Structural Damage Detection Using Recursive Canonical Correlation Analysis 7. Real-time Modal Identification- RCCA Based Approach PART: II 8. Recursive SHM Practical Applications 9. Conclusions and Future Prospects