Research on Technology of Extracting the Starting Position of Reciprocating Motion Period Based on Cross-Correlation

The correction of articulated industrial robot fault diagnosis, which depend on the accuracy of articulated industrial robot motion period extraction. The cycle extraction of industrial robot action cycling signal includes two research contents: the period time length of detection signal and its period starting position. The method based on Cross-correlation was applied to extract the starting position of reciprocating motion period. The initial phase of the signal was extracted by cross-correlation method, and then transformed into time domain to get the initial position of the signal's period. The acoustic emission signal of industrial robot, whose period starting position extracting experiments showed that the method has high extraction accuracy of period starting position. It had a significant practical application value for condition monitoring of reciprocating rotating machinery system.