This book offers a comprehensive overview of vibration control and energy harvesting based on the synchronized switch of piezoelectric transducers, which has been a hot research topic in the past decade. With a self-contained and single-source style, it discusses aspects ranging from the fundamental concepts of electro-mechanical coupling, and energy conversion and damping effects in structures with integrated piezoelectric transducers, to advanced methodologies for their modeling, analysis and experimental validation. Starting from an elementary level of modeling for electro-mechanical systems, this book describes the underlying principle of the synchronized switch damping (SSD) method; its advanced variants, such as SSD with adaptive voltage source and SSD based on negative capacitance; and their application in multi-modal vibration control. It also illustrates the principle of energy harvesting based on piezoelectric materials and enhanced methods of synchronized switch harvesting. As such, it offers a valuable resource for researchers and graduate students working on advanced piezoelectric-based vibration-suppression systems, and for senior undergraduate students interested in the fundamentals of vibration damping and smart structures.

Professor Hongli Ji is a professor and doctoral supervisor at Nanjing University of Aeronautics and Astronautics, where she received her Ph.D. in 2012. She is a recipient of the National Science Fund for Excellent Young Scholars, a Scholar of the Hong Kong Scholars Program, a Second-Level Candidate of the Jiangsu “333 High-Level Talent Program”, and a winner of the National Excellent Doctoral Dissertation Award in her discipline.

Her research focuses on structural dynamics testing, analysis and control, particularly vibration and noise reduction of intelligent materials and structures. She has published over 150 journal papers, including more than 120 SCI-indexed papers, with over 3,800 SCI citations. She has filed over 40 national invention patents, more than 30 of which have been authorized, and has authored or co-authored several books.

She serves as Associate Editor of Journal of Intelligent Material Systems and Structures and editorial board member of several journals, including Smart Materials and Structures, Journal of Vibration Engineering and Actuators. She has led over ten research projects and received multiple scientific and technological awards.

Qiu Jinhao is a Professor and Ph.D. supervisor at Nanjing University of Aeronautics and Astronautics, a Distinguished Professor under the Changjiang Scholars Program, an overseas high-level talent, and a Chief Scientist of the National 973 Program. Born in October 1963, he received his Doctor of Engineering degree from Tohoku University, Japan.

His research focuses on intelligent materials and structures. He currently serves as Executive Associate Editor-in-Chief of the Journal of Vibration Engineering and as an editorial board member of several journals, including Frontiers in Mechanical Engineering. He has led NSFC key projects and National 973/863 programs, published over 300 SCI papers with more than 10,000 citations, authored or co-authored five books, and holds more than 50 authorized invention patents, including five international patents.

He was elected an ASME Fellow in 2014 and received the title of National Outstanding Science and Technology Worker. He has won more than twenty awards, including the National Defense Invention Award, Jiangsu Science and Technology Award, and the Ministry of Education Science and Technology Progress Award.