التفاصيل البيبلوغرافية
| العنوان: |
System Identification Techniques for Estimating Material Functions from Wave Propagation Experiments. |
| المؤلفون: |
Söderström, Torsten1 ts@syscon.uu.se |
| المصدر: |
Inverse Problems in Engineering. Oct2002, Vol. 10 Issue 5, p413-439. 27p. 5 Diagrams, 10 Graphs. |
| مصطلحات موضوعية: |
*SYSTEM identification, *RADIO wave propagation, *MECHANICAL engineering, *MATHEMATICS, *ELASTIC analysis (Engineering) |
| مستخلص: |
Material properties of an elastic material are characterized by the elastic modulus, which is real-valued and constant. For viscoelastic materials, such as plastics and polymers, the relation between stress and strain is instead dynamic, and characterized by the complex-valued and frequency-dependent complex modulus. In this article it is described how system identification techniques can be used to determine the complex modulus using strain data from wave propagation experiments in a test specimen. Modeling, derivation of estimators, and analysis of their numerical and statistical properties are included. Several practical examples are presented using real-world data, and a number of extensions are outlined. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
