Nonlinear model standardization for the analysis and design of nonlinear systems with multiple equilibria

In engineering practice, a nonlinear system stable about several equilibria is often studied by linearizing the system over a small range of operation around each of these equilibria, and allowing the study of the system using linear system methods. Theoretically, for operations beyond a small range...

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Bibliographic Details
Published inNonlinear dynamics Vol. 104; no. 3; pp. 2553 - 2571
Main Authors Zhu, Yun-Peng, Lang, Z. Q., Guo, Yu-Zhu
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.05.2021
Springer Nature B.V
Subjects
Automotive Engineering
Autoregressive models
Classical Mechanics
Control
Design analysis
Dynamical Systems
Engineering
Equilibrium
Mechanical Engineering
Nondestructive testing
Nonlinear differential equations
Nonlinear systems
Nonlinearity
Original Paper
Standardization
Systems analysis
Systems design
Vibration
Frequency domain
Equilibria
Nonlinear systems
NARX/NDE model
Standardization
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Summary:In engineering practice, a nonlinear system stable about several equilibria is often studied by linearizing the system over a small range of operation around each of these equilibria, and allowing the study of the system using linear system methods. Theoretically, for operations beyond a small range but still within the stable regime of an equilibrium, the system behaves nonlinearly, and can be described and investigated using the Volterra series approach. However, there is still no available approach that can systematically transform the model of a nonlinear system into a form that can be studied over the whole stable regime about an equilibrium so as to facilitate the system study using the Volterra series approach. This transformation is, in the present study, referred to as nonlinear model standardization, which is the extension of the well-known concept of linearization to the nonlinear case. In this paper, a novel approach to nonlinear model standardization is proposed for nonlinear systems that can be described by a Nonlinear AutoRegressive model with eXogeneous input (NARX) or a nonlinear differential equation (NDE) model. The proposed approach is then used in three case studies covering the applications in nonlinear system analysis, nonlinear system design, and nonlinearity compensation, respectively, demonstrating the significance of the proposed nonlinear model standardization in a wide range of engineering practices.
ISSN:0924-090X
1573-269X
DOI:10.1007/s11071-021-06429-9