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A Study of Quadrotor Modelling
Linköping University, Department of Computer and Information Science.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Quadrotors are a type of aircraft that lately has gained increased popularity within the UAV-scientific area. Many research groups around the world have implemented control systems that allow for autonomous flight of quadrotors with the help of the known dynamics.

This thesis presents two approaches to modelling the dynamics of the quadrotor. The first is a linear greybox approach where the structure is derived from known equations and some constants are measured and some identified through system identification techniques. The second model is a blackbox model where a neural network is trained and used. The two models are then evaluated using known error measurements with the help of previously recorded flight data and the results are presented. It is for example shown that with the untreated flight data the traditional greybox model have accurate dynamics but is sensitive to noise and drifts in the measurements. It is also shown that better results generally can be achieved using a neural network model, especially for noisy unpreprocessed data.

 

Place, publisher, year, edition, pages
2011. , 49 p.
Keyword [en]
Quadrotor, System identification, modelling, Greybox model, blackbox model, Neural Network
National Category
Computer Engineering
Identifiers
URN: urn:nbn:se:liu:diva-66503ISRN: LITH-EX-A--11/009--SEOAI: oai:DiVA.org:liu-66503DiVA: diva2:404742
Presentation
2011-03-11, Alan Turing, Linköpings Universitet, Linköping, 14:15 (English)
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-03-19 Created: 2011-03-18 Last updated: 2011-03-19Bibliographically approved

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