Application of Adaptive Fuzzy ADRC for Hypersonic Flight Vehicle

Hypersonic aircraft has the characteristics of uncertain model parameters, uncertain external disturbances and complicated flight airspace during the reentry flight. Traditional design methods such as PID cannot satisfy reentry flight control. The active disturbance rejection control method can uniformly estimate the various uncertainties inside and outside the model as a total disturbance, and obtain a feedback linearization model through compensation. In addition, in view of the difficulty of parameter setting in the ADRC algorithm, this paper proposes a method based on fuzzy control. Through the formulation of fuzzy rules in fuzzy control, the height and speed of hypersonic aircraft are controlled. It can be seen from the simulation results that this method can better track the altitude command and the speed command, and the system will return to normal immediately after a brief over-tolerance occurs. The above simulation results show that the method meets the requirements of engineering use.