Table 2 Parameters derived from the SSPP representation

Mean, $f_{mean}=\frac{1}{n}{\displaystyle \sum _{i=1}^n{p}_i}$

Root mean square, $f_{rms}=\sqrt{\frac{1}{n}{\displaystyle \sum _{i=1}^n{\left(p_i-f_{mean}\right)}^2}}$

Maximum, $f_{\max }=\underset{i=1,\cdots ,n}{\max }\left\{p_i\right\}$

Impulse factor, $f_{impulse}=\frac{f_{\max }}{f_{mean}}$

Peak factor, $f_{peak}=\frac{f_{\max }}{f_{rms}}$

Wave factor, $f_{wave}=\frac{f_{rms}}{f_{mean}}$

Mean of difference, $f_{difference}=\frac{1}{n-1}{\displaystyle \sum _{i=1}^{n-1}\left|p_i-p_{i+1}\right|}$