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Using vibration-based monitoring to detect mass changes in satellites

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/13114

Using vibration-based monitoring to detect mass changes in satellites

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Title: Using vibration-based monitoring to detect mass changes in satellites
Author: Vernon, Breck
Advisor(s): Maji, Arup
Committee Member(s): Taha, Mahmoud
Ng, Percy
Department: University of New Mexico. Dept. of Civil Engineering
Subject: Structural Health Monitoring
Vibration Monitoring
Satellites
LC Subject(s): Artificial satellites--Vibration-- Measurement.
Mass (Physics)--Measurement.
Structural health monitoring.
Artificial satellites--Testing.
Artificial satellites--Maintenance and repair
Frequency response (Dynamics)
Degree Level: Masters
Abstract: Vibration-based structural health monitoring could be a useful form of determining the health and safety of space structures. A particular concern is the possibility of a foreign object that attaches itself to a satellite in orbit for adverse reasons. A frequency response analysis was used to determine the changes in mass and moment of inertia of the space structure based on a change in the natural frequencies of the structure or components of the structure. Feasibility studies were first conducted on a 7 in x 19 in aluminum plate with various boundary conditions, which was impacted with a mallet and the frequency response was determined. The frequency response for the blank plate was used as the basis for detection of the addition, and possibly the location, of added masses on the plate. Statistical variation of the data was determined to allow variations of frequency due to added mass and thermal changes to be evaluated. Effect on damping was also investigated. The test results were compared to both analytical solutions and finite element models created in SAP2000. The testing was subsequently expanded to aluminum alloy satellite panels and a mock satellite with dummy payloads to determine the thresholds of detectability.
Graduation Date: July 2011
URI: http://hdl.handle.net/1928/13114


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