Nonlinear Constrained Adaptive Backstepping Tracking Control for a Hypersonic Vehicle with Uncertainty

Abstract

The control problem of a flexible hypersonic vehicle is presented, where input saturation and aerodynamic uncertainty are considered. A control-oriented model including aerodynamic uncertainty is derived for simple controller design due to the nonlinearity and complexity of hypersonic vehicle model. Then it is separated into velocity subsystem and altitude subsystem. On the basis of the integration of robust adaptive control and backstepping technique, respective controller is designed for each subsystem, where an auxiliary signal provided by an additional dynamic system is used to compensate for the control saturation effect. Then to deal with the "explosion of terms" problem inherent in backstepping control, a novel first-order filter is proposed. Simulation results are included to demonstrate the effectiveness of the adaptive backstepping control scheme.

Chebyshev Neural Network-Based Adaptive Nonsingular Terminal Sliding Mode Control for Hypersonic Vehicles

“…So far, many advanced control methods have been used to design control systems for hypersonic vehicles, such as dynamic inversion [3][4][5], backstepping control [6][7][8][9], and fuzzy control [10][11][12][13]. In particular, sliding mode control (SMC) is well known for its robustness against parameter uncertainties and external disturbances [14].…”

Adaptive Disturbance Rejection Control for Automatic Carrier Landing System

“…In [9], a combined direct and indirect MRAC statefeedback architecture was developed for MIMO dynamical systems with matched uncertainties and the methodology was extended to systems with a baseline controller. To solve the disturbance rejection problems, adaptive feedforward [10,11], feedback control methods [12], terminal sliding-mode control method [13][14][15], and back-stepping control designs [16,17] were proposed. In [18], an extension of biobjective optimal control modification for unmatched uncertain systems was proposed.…”