Defence of dissertation in the field of Mechanical Engineering, Tuomas Tiainen, M.Sc.

Title of the dissertation: Multi-Probe Roundness Measurement of Large Rotors

Multi-probe roundness measurement methods can be used to determine the roundness profile of a rotating workpiece cross-section in conditions where the center point motion of the measured cross section is not repeatable during the rotation.

With simulations, the accuracy of different multi-probe roundness measurement in typical conditions was assessed. As the selected probe angles also have an effect on the accuracy of the measurement, the problem of harmonic suppression was analyzed and new optimal probe angles for multi-probe roundness measurement were
determined.

The results of the research can be applied in technical problems where accurate measurement of the roundness profile is required and it is not possible to support the workpiece to achieve repeatable center point motion, for example in the measurement of paper machine rolls.

Opponent: Prof., PhD, Han Haitjema, KU Leuven, Belgium

Custos: Prof. Raine Viitala, Aalto University School of Engineering, Department of Mechanical Engineering

Doctoral candidate's contact information: M.Sc. Tuomas Tiainen, Aalto University School of Engineering, Department of Mechanical Engineering, [email protected]

The public defence will be organized via remote technology https://aalto.zoom.us/j/61972064692

Meeting ID: 619 7206 4692

Zoom quick guide https://www.aalto.fi/en/services/zoom-quick-guide

The dissertation is publicly displayed as online display 10 days before the defence at https://aaltodoc.aalto.fi/doc_public/eonly/riiputus/ 

Dissertation release