Robust Speed Tracking of Networked PMSM Servo Systems with Uncertain Feedback Delay and Load Torque Disturbance

Table 2

The relationship between the speed tracking error and 𝜂.

Speed error
percentage	6%	5.6%	5.2%	4.8%	4.4%	4.0%
𝜂	0.082	0.075	0.068	0.061	0.055	0.049
Speed error
percentage	3.6%	3.2%	2.8%	2.4%	2.0%
𝜂	0.043	0.037	0.032	0.026	0.005