Abstract
This paper describes a vibration analysis based on the chaos theory to diagnose rolling bearings. We introduced the largest Lyapunov exponent which is one of the chaotic time series analyses. The largest Lyapunov exponent has several parameters we need to determine. These parameters affect the value of the largest Lyapunov exponent. Therefore it is important to determine the parameters suitable for the diagnosis. We paid attention to the two parameters: radius and time delay, and investigated the influence to the chaotic time series analysis to improve the accuracy of diagnosis.
