Finite-Time Terminal Sliding Mode Tracking Control of a VTOL UAV via the Generalized NDOB

Table 1

Performance comparisons of the root mean square error.

	(m)	(m)	(m)
Proposed methodology	0.1418	0.1471	0.0346
Adaptive backstepping	0.1675	0.4125	0.2144
PD approach	0.4993	0.8987	0.9023