We study robust hovering control of vertical/short takeoff and landing (V/S
TOL) aircraft. For hovering control, we can model a V/STOL aircraft as a pl
anar vertical takeoff and landing (PVTOL) aircraft. We use a recently devel
oped optimal control approach to design a robust hovering control. The resu
lting control is a nonlinear state feedback whose robustness is demonstrate
d by numerical simulations.