Fractional-Order Control of a Micrometric Linear Axis

Table 4

𝜁-𝜓  combinations minimizing the dimensionless settling time with dimensionless settling energy equivalent to the pure PD.

𝜁  of the PD control with equivalent settling energy	PDD^1/2 control minimizing
	the settling time
	𝜁	𝜓
1.2	0.48	2.1510
1	0.45	1.4266
0.8	0.46	0.7990