(a) The uncontrolled displacements
(b) The displacements controlled by PPMO method
(c) Comparisons of control effects between PPMO and LQR
Figure 6: The uncontrolled displacements (a) and those controlled by PPMO (b) under the condition of wind speed of  m/s, with comparisons of control effects between PPMO and LQR demonstrated in (c).