Loading...
Please wait, while we are loading the content...
Similar Documents
On-line modal state monitoring of slowly time-varying structures
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Johnson, Erik A. Voulgaris, Petros G. Bergman, Lawrence A. |
| Copyright Year | 1997 |
| Description | Monitoring the dynamic response of structures is often performed for a variety of reasons. These reasons include condition-based maintenance, health monitoring, performance improvements, and control. In many cases the data analysis that is performed is part of a repetitive decision-making process, and in these cases the development of effective on-line monitoring schemes help to speed the decision-making process and reduce the risk of erroneous decisions. This report investigates the use of spatial modal filters for tracking the dynamics of slowly time-varying linear structures. The report includes an overview of modal filter theory followed by an overview of several structural system identification methods. Included in this discussion and comparison are H-infinity, eigensystem realization, and several time-domain least squares approaches. Finally, a two-stage adaptive on-line monitoring scheme is developed and evaluated. |
| File Size | 8299892 |
| Page Count | 186 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970037562 |
| Archival Resource Key | ark:/13960/t0ns5pn28 |
| Language | English |
| Publisher Date | 1997-10-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Dynamic Response Errors Evaluation Tracking Filters Decision Making Monitors Data Processing On-line Systems Time System Identification Spatial Filtering Examination Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
