Damage localization of mechanical structures considering environmental and operational conditions based on output-only system identification and H∞-estimation
| Autor: | Maximilian Rohrer, Max Vollmering, Armin Lenzen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
State-space representation Computer science Mechanical Engineering System identification Aerospace Engineering Context (language use) 02 engineering and technology State (functional analysis) 01 natural sciences Projection (linear algebra) Computer Science Applications Identification (information) 020901 industrial engineering & automation Control and Systems Engineering Control theory 0103 physical sciences Signal Processing State space 010301 acoustics Subspace topology Civil and Structural Engineering |
| Zdroj: | Mechanical Systems and Signal Processing. 156:107572 |
| ISSN: | 0888-3270 |
| DOI: | 10.1016/j.ymssp.2020.107572 |
| Popis: | In this study the formerly introduced damage localization method state projection estimation error (SP2E) is modified to take varying environmental and operational conditions (EOC) into account. The method is based on output-only system identification and state space parameterization. This contribution introduces the basic concept of the novel method. This method is divided in a learning and a monitoring phase, the current structural state is subsequently identified by a state space model using stochastic subspace identification (SSI) and H ∞ -estimation. During monitoring phase method SP2E is then applied to localize structural alterations. Finally, to verify the proposed method, a numerical study is conducted. Localizing mass perturbation and stiffness degradation, the applicability of the proposed method has been proven in the context of EOC. |
| Databáze: | OpenAIRE |
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