Frequency Domain Nonlinear Vibration Features for Fault Diagnosis in Complex Structures

Dr. Quankun Li received his B.Eng. degree from Nanjing University of Aeronautics and Astronautics, China, in 2011, M.Eng. degree in Propulsion Theory and Engineering of Aeronautics and Astronautics from Northwestern Polytechnical University, China, in 2014, and Ph.D. degree in Mechanical Engineering from Hong Kong Polytechnic University, China, in 2020, respectively. He is now Associate Professor with the School of Power and Energy, Northwestern Polytechnical University, and his current research topic is the Vibration Control and Fault Diagnosis of mechanical structures including satellites, engines, aircrafts, vehicles, etc. He currently serves as Guest Associate Editor on Vibration Systems of Frontiers in Mechanical Engineering, Reviewer Editor on Energetics and Propulsion of Frontiers in Aerospace Engineering, and Section collection Editor on Vibration Systems of Mechanical Engineering Advances.Prof. Xingjian Jing received his B.S. degree from Zhejiang University, China, M.S. degree and Ph.D. degree in Robotics from Shenyang Institute of Automation, Chinese Academy of Sciences, China, respectively. He also achieved a Ph.D. degree in nonlinear systems and signal processing from University of Sheffield, U.K. He is now Professor with the Department of Mechanical Engineering, City University of Hong Kong, and his current research interests are generally related to Nonlinear Dynamics, Vibration, Control and Robots, focusing on theory and methods for employing nonlinear benefits in engineering, including nonlinear frequency domain methods, nonlinear system identification or signal processing, vibration control, robust control, sensor technology, energy harvesting, nonlinear fault diagnosis or information processing, bio-inspired systems and methods, bio-inspired robotics and control, etc.

• Introduction.- Representation of Complex Structures with the Volterra Series.- Utilising Properties of SOOS TFs to Virtual Beam-like Structures.- A Novel Method based on SOOS TFs and Local Tuning Approach.- An Improved Method based on SOOS TFs for Ring-type Structures.- A Systematic Method based on SOOS TFs for Various Types of Faults.- A Novel OS@DF TF-based Method for Open Beam-type Structures.- A Novel OS@DF TF-based Method for Closed Ring-type Structures.- A Novel OS@DF TF-based Method for Simple Grid-type Structures.- An Integrated OS@DF TF-based Method for Union-type Structures.- One Extended OS@DF TF-based Method for Rotor-type Structures.- Summary and Overview.