𝔖 Bobbio Scriptorium
✦   LIBER   ✦

EXPERIMENTAL VALIDATION OF THE CONSTANT LEVEL METHOD FOR IDENTIFICATION OF NON-LINEAR MULTI-DEGREE-OF-FREEDOM SYSTEMS

✍ Scribed by G. DIMITRIADIS

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
756 KB
Volume
258
Category
Article
ISSN
0022-460X

No coin nor oath required. For personal study only.

✦ Synopsis

System identification for non-linear dynamical systems could find use in many applications such as condition monitoring, finite element model validation and determination of stability. The effectiveness of existing non-linear system identification techniques is limited by various factors such as the complexity of the system under investigation and the type of non-linearities present. In this work, the constant level identification approach, which can identify multi-degree-of-freedom systems featuring any type of non-linear function, including discontinuous functions, is validated experimentally. The method is shown to identify accurately an experimental dynamical system featuring two types of stiffness non-linearity. The full equations of motion are also extracted accurately, even in the presence of a discontinuous non-linearity.

πŸ“œ SIMILAR VOLUMES

IDENTIFICATION OF MULTI-DEGREE-OF-FREEDO
IDENTIFICATION OF MULTI-DEGREE-OF-FREEDOM NON-LINEAR SYSTEMS UNDER RANDOM EXCITATIONS BY THE β€œREVERSE PATH” SPECTRAL METHOD
✍ C.M. Richards; R. Singh πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 English βš– 534 KB

Conventional frequency response estimation methods such as the ''H1'' and ''H2'' methods often yield measured frequency response functions which are contaminated by the presence of non-linearities and hence make it difficult to extract underlying linear system properties. To overcome this deficiency

AN EXTENSION OF FORCE APPROPRIATION TO T
AN EXTENSION OF FORCE APPROPRIATION TO THE IDENTIFICATION OF NON-LINEAR MULTI-DEGREE OF FREEDOM SYSTEMS
✍ P.A. ATKINS; J.R. WRIGHT; K. WORDEN πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 249 KB

Classical force appropriation methods are used in the identi"cation of linear systems to determine the multi-point force vector that will induce single-mode behaviour, thus allowing each normal mode to be identi"ed in isolation. This paper presents an extension to this linear approach that will enab

COMMENTS ON β€œIDENTIFICATION OF MULTI-DEG
COMMENTS ON β€œIDENTIFICATION OF MULTI-DEGREE-OF-FREEDOM NON-LINEAR SYSTEMS UNDER RANDOM EXCITATIONS BY THE β€˜REVERSE PATH’ SPECTRAL METHOD”
✍ J.A. FITZPATRICK; H.J. RICE πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 65 KB

The authors of reference [1] are to be commended for implementing the &&reverse path'' non-linear spectral analysis method for identifying the constituents elements of simulated three-and "ve-degree-of-freedom (d.o.f.) non-linear systems. However, we feel that the paper requires some comment as to o

Transient vibration of linear multi-degr
Transient vibration of linear multi-degree-of-freedom systems by the phase-plane method
✍ R.S. Ayre πŸ“‚ Article πŸ“… 1952 πŸ› Elsevier Science 🌐 English βš– 557 KB

This paper shows the application of phase-plane graphical methods to transient forced vibrations of undamped, linear systems having more than one degree of freedom. Lumped parameter as well as distributed parameter systems are included. An introductory application to a single-degree-of-freedom syste

TIME-SEGMENTED FREQUENCY-DOMAIN ANALYSIS
TIME-SEGMENTED FREQUENCY-DOMAIN ANALYSIS FOR NON-LINEAR MULTI-DEGREE-OF-FREEDOM STRUCTURAL SYSTEMS
✍ W.J. MANSUR; J.A.M. CARRER; W.G. FERREIRA; A.M. CLARET DE GOUVEIA; F. VENANCIO-F πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 279 KB

This paper presents a new frequency-domain method to analyze physically non-linear structural systems having non-proportional damping. Single-and multi-degree-of-freedom (d.o.f.) systems subjected to time-dependent excitations are considered. A procedure to consider initial conditions, required by t