Kinematic Calibration of a Parallel 2-UPS/RRR Ankle Rehabilitation Robot

Table 7

Fitting results of during EV.

	2nd-order	3rd-order	4th-order	5th-order	6th-order
Var	0.0352	0.0349	0.0336	0.0336	0.0317
Std	0.1875	0.1869	0.1834	0.1834	0.1781
	0.9098	0.9104	0.9137	0.9138	0.9187