Time Series Anomaly Detection Techniques for Predictive Maintenance

How to calculate statistical features of a vibration signal with a duty cycle of 20 %

[Mathieu NOE]

hello

could you elaborate a bit ? and explain what matlab problem you are dealing with ?

[Jacques]

How the calculate the skewness feature of the attched vibration signal (Ref. webinar : Time Series Anomaly Detection Techniques for Predictive Maintenance

[Mathieu NOE]

if you search a bit on this forum and more generally on the web, there are lots of ressources about this topic :

this is just a starter :

How to calculate skewness & kurtosis ? - MATLAB Answers - MATLAB Central

skewness

matlab - How can I calculate the rolling mean, skewness, kurtosis, RMS and few other statistical features from an input vector? - Stack Overflow

and certainly many more ...

also in the Fex section you can find what you're after :

Moving Window Statistics - File Exchange - MATLAB Central

Toolbox signal - File Exchange - MATLAB Central

etc......

[Jacques]

The rolling skewness is not a feature of the on conditiion. Do you have a method to calculate the skewnes in the on periods only ?

[Mathieu NOE]

do you mean you want to compute the skewness when signal amplitude is above a ertain threshold ?

you ca certainly do that