Finite-Time Attitude Tracking Control for Hypersonic Flight Vehicles with Actuator Saturation

• Published in: International journal of aerospace engineering Vol. 2022; pp. 1 - 15
• Main Authors: Cao, Teng, Gong, Huajun, Xiao, Huiyunuo, Xue, Yixuan
• Format: Journal Article
• Language: English
• Published: New York Hindawi 23-11-2022; Hindawi Limited
• Subjects: Actuators; Adaptive control; Adaptive systems; Aerospace engineering; Attitude control; Control methods; Controllers; Design; Disturbance observers; Dynamic models; Dynamical systems; Flight vehicles; Fuzzy logic; Hypersonic flight; Methods; Neural networks; Nonlinear dynamics; Parameter uncertainty; Sliding mode control; Tracking control; Vehicles
• ISSN: 1687-5966; 1687-5974
• DOI: 10.1155/2022/5419377

This paper investigates finite-time attitude tracking control strategies for hypersonic flight vehicles (HFVs) with parameter uncertainties, external disturbances, and actuator saturations by applying sliding model control, adaptive mechanism, and nonlinear disturbance observer techniques. A nonlinear dynamic model of HFV attitude system in reentry flight phase is established. Then, a basic attitude control method of the HFV system is designed based on a terminal sliding mode control (TSMC) scheme to accommodate the system-lumped disturbance torques and guarantee the finite-time stability. To relax the prior knowledge of bounded lumped disturbance of the TSMC-based HFV attitude system, an adaptive TSMC (ATSMC) scheme is proposed. In order to relax the limit of compound uncertainties and attenuate chattering phenomenon of the TSMC-based HFV attitude system, a nonlinear disturbance observer-based TSMC (DO-TSMC) scheme is presented, which enhances the disturbance attenuation and robust tracking performance. Finally, simulation results of a generic X-33 nonlinear model exhibit the effectiveness of the proposed TSMC, ATSMC, and DO-TSMC schemes.