Study on Shaft Orbits Measurement and Identification Based on LabVIEW

In order to measure and recognize shaft orbits a fault diagnosis system based on LabVIEW is developed. Integrating data acquisition, signal analysis and processing, information recognition and fault diagnosis, this system can automatically measure, analyze, identify the shaft orbits and get fault results. A pattern recognition method on the basis of the invariant moment algorithm is studied with LabVIEW and used to the shaft orbit recognition. The experimental results show that the shaft orbit of a rotor can be identified through this method and the shape is close to the ellipse. So the main fault of the rotor is imbalance. The fault result is verified by spectrum analysis. This study is helpful to develop the online fault diagnosis system based on LabVIEW.