Application of fuzzy optimization control in NSV anti-disturbance

Variable universe fuzzy control based on intelligent control technology is proposed in this paper for the hypersonic flight process of nearspace vehicle (NSV) with severe changes of aero-dynamic parameters and susceptibility on the external disturbances. And the contraction-expansion factor of the fuzzy control is given to modify the scale of universe and reduce the computational cost. By adopting fast fuzzy terminal sliding mode with variable universe in the slow loop controller which is suffering the disturbance, its robustness, the speed of anti-disturbance and control accuracy are enhanced with the adaptively modified fuzzy universe. A demonstration with the Lyapunov function is given to proved that the errors of system could converge to zero in finite time.