Evaluation of Dynamic Uncertainty of Rolling Bearing Vibration Performance

Table 1

Different methods used to calculate time delay and embedding dimension.

Method	Purpose	Advantage	Disadvantage
Autocorrelation	Calculating τ	Simple operation	Not suitable for high-dimensional and nonlinear problems
Multiple autocorrelation	Calculating τ	(1) Simple operation; (2) Suitable for high-dimensional problems; (3) Has obvious geometric significance	Not suitable for nonlinear problems
Mutual information	Calculating τ	Suitable for high-dimensional and nonlinear problems	Complex operation
G-P	Calculating m	Wide application range	Influenced by subjective factors easily
False nearest neighbor	Calculating m	Simple operation	(1) Vulnerable to noise; (2) Influenced by subjective factors easily
Cao	Calculating m	(1) Few data are needed; (2) Identifies the deterministic or random signal effectively; (3) Only the parameter τ is required	Complex operation
C-C	Calculating τw and m simultaneously	(1) Simple operation; (2) Wide application range; (3) Good calculation effect	—