Anti-Disturbance Dynamic Surface Control for Air-Breathing Hypersonic Vehicles Based on NDO

Abstract

This paper is concerned with the anti-disturbance dynamic surface controller (DSC) design for an airbreathing hypersonic vehicle (AHV) based on nonlinear disturbance observer (NDO). For the longitudinal model of AHV subjected to the high nonlinearity, the uncertain parameters and the varying disturbance, the feedback linearization method is employed considering the uncertain parameters. Then, a dynamic surface controller is designed based on the inverse hyperbolic sine function to solve the problem of "explosion of terms" in the traditional backstepping control. Furthermore, in order to enhance the disturbance rejection ability, a novel NDO is designed to estimate the model uncertainties and external disturbances. Finally, the simulation results verify the superior tracking performance of the proposed control strategy.INDEX TERMS air-breathing hypersonic vehicle, anti-disturbance, dynamic surface control, nonlinear disturbance observer.

Nonlinear Predictive Control with Sliding Mode for Hypersonic Vehicle

“…From the above analysis, it can be seen that the traditional nonlinear control methods have poor robustness and stability, and it is difficult to solve the problem of parameter uncertainty and system model mismatch. Observers [7,20], neural networks [5,21,22], and other methods are used to actively compensate the system uncertainty, which have certain robustness. The sliding mode control method has obvious advantages in solving nonlinear problems with fast response and antidisturbance ability, but it still needs to solve the chattering problem.…”