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Vibro-acoustic monitoring for in-flight spacecraft
Luleå tekniska universitet, Institutionen för system- och rymdteknik, Rymdteknik. Cranfield University. (Space Technology)
2017 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
Abstract [en]

The concept of using the vibration transmitted through the structure of space systems whilst they are in flight for monitoring purposes is proposed and analysed.The performed patent review seems to indicate that this technique is not currently used despite being, in principle, a good way to obtain valuable knowledge about the spacecraft’s condition. Potential sources of vibration were listed and some of them were down-selected via a trade-off analysis for implementation in a numerical model of a CubeSat structure. Models were proposed for the sources chosen and implemented in the Ansys Workbench software, along with a simplified structure designed to be representative of a generic picosatellite mission.The results confirmed very different amplitude and frequency ranges for the sources of interest, which would make it difficult to monitor them with one type of sensor.Basic system requirements for accelerometer operating under space conditions were derived and commercial sources were identified as already having the technologies needed.The conclusion was a positive evaluation of the overall concept, although revising negatively the initial expectations for its performance due to the diversity encountered in the sources.

sted, utgiver, år, opplag, sider
2017. , 121 s.
Emneord [en]
Condition monitoring, space environment, accelerometers, structural health monitoring, spaceflight.
HSV kategori
Identifikatorer
URN: urn:nbn:se:ltu:diva-66104OAI: oai:DiVA.org:ltu-66104DiVA: diva2:1148906
Eksternt samarbeid
Cranfield University
Utdanningsprogram
Space Engineering, master's level (120 credits)
Veileder
Examiner
Tilgjengelig fra: 2017-10-13 Laget: 2017-10-12 Sist oppdatert: 2017-10-16bibliografisk kontrollert

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