Nonlinear Disturbance Observer-Based Sliding Mode Control for the PMSM with Matched and Mismatched Disturbances

Table 3

The performance index of two schemes.

	SMC scheme (speed)		NDO-SMC scheme (speed)
	Overshoot (%)	Settling time (s)	Overshoot (%)	Settling time (s)
70%	21.91	0.094	8.87	0.0427
80%	15.40	0.083	7.87	0.0403
90%	13.30	0.077	7.34	0.0387
100%	11.97	0.072	7.05	0.037
110%	13.74	0.079	7.47	0.0391
120%	16.03	0.085	8.01	0.0406