Research and Development of A Dynamic Balancing Measurement System for Miniature High-speed Turbine Rotor
Date Issued
2008
Date
2008
Author(s)
Cha, Yu-Jie
Abstract
The aim of this thesis is to design and develop a dynamic balancing measurement machine for high-speed turbines of dental headpieces. Its task contains theoretical analyses、machine design、calibration and practical measurements. The functional and the embodiment layout of the measurement machine is designed and developed according to the geometric form of turbines. To verify their functions and performances, a series of testing experiments are carried out for all subsystems such as the suspension system, the driving system, the unbalance measurement system, the rotating angle and speed measurement system. Based on the dynamic theory, the relationship between the unbalancing vector of a turbine and the vibration signal derived from the unbalance measurement system is deduced. Through optimizing the resonant behavior of the suspension system, the measuring resolution of unbalance can be improved. The FFT and the waveform superposition method are used to filter the interference vibrations to obtain the real unbalancing vector of the turbine and to analyze the influential parameters of the measuring error. Finally based on analysis on experimental testing, the influential factors of measurement accuracy are induced and the corresponding improvement strategies are also proposed.
Subjects
dental headpiece
dynamic balancing
unbalance measurement
spring resonance
FFT
wave-form superposition method
Type
thesis
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