2021/11/01 by Hua‐Liang Wei, S.A. Billings, Wei, Hua-Liang +1
Engineering · #Control Systems and Identification #FOS: Electrical engineering #Fault Detection and Control Systems #Structural Health Monitoring Techniques #Systems and Control (eess.SY) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2111.00748
openalex publication_date 2021/11/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A new concept, called quasi-linear transfer functions (QLTF), which can be used to characterize the output frequency behaviour of nonlinear systems, is introduced based on the well-known Volterra series representation. By using the new concept of QLTF, it can be proved that the input and output frequency behaviour of a given system can be expressed using a number of one-dimensional functions with a form similar to that of the traditional frequency response function for linear systems. Two algorithms, which can be used to determine the valid range of the associated output frequencies of arbitrary order nonlinear subsystems with both a multitone and general inputs, are provided. The results obtained provide a new important insight into the output frequency characteristics of nonlinear systems and have many potential applications in nonlinear systems analysis and nonlinear structure detection