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

Abstract

This paper presents an adaptive nonsingular terminal sliding mode control approach for the attitude control of a hypersonic vehicle with parameter uncertainties and external disturbances based on Chebyshev neural networks (CNNs). First, a new nonsingular terminal sliding surface is proposed for a general uncertain nonlinear system. Then, a nonsingular sliding mode control is designed to achieve finite-time tracking control. Furthermore, to relax the requirement for the upper bound of the lumped uncertainty including parameter uncertainties and external disturbances, a CNN is used to estimate the lumped uncertainty. The network weights are updated by the adaptive law derived from the Lyapunov theorem. Meanwhile, a low-pass filter-based modification is added into the adaptive law to achieve fast and low-frequency adaptation when using high-gain learning rates. Finally, the proposed approach is applied to the attitude control of the hypersonic vehicle and simulation results illustrate its effectiveness.

Fault-Tolerant Control of Hypersonic Vehicle Using Neural Network and Sliding Mode

“…Although the failure observer's assistance was used to estimate failure information, the overall system's stability was not revealed, making it impossible to assess the process's condition at any time. We investigate the failure tracking control of a hypersonic vehicle employing terminal sliding mode theory and a neural network approach in this research [25][26][27][28][29]. In this paper, a fault-tolerant control (FTC) method combining radial basis function neural network (RBFNN) and adaptive terminal sliding mode (ATSM) is proposed, which can track the ABHV trajectory of an ABHV in the presence of air density, mass, and moment of inertia uncertainties as well as actuator faults.…”

Robust Trajectory Planning for Hypersonic Glide Vehicle with Parametric Uncertainties

“…Depending on the high lift-to-drag (L/D) ratio shape design and proper aerodynamic control techniques, it can achieve long flight distance and strong maneuverability. In recent years, HGV has attracted worldwide attention for its broad application prospects in both military and civilian fields [1][2][3].…”