Fuzzy Disturbance Observer-Based Fixed-Time Attitude Control for Hypersonic Morphing Vehicles

• Published in: IEEE transactions on aerospace and electronic systems Vol. 60; no. 5; pp. 6577 - 6593
• Main Authors: Zhang, Hao, Wang, Peng, Tang, Guojian, Bao, Weimin
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.10.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Aerodynamics; Aerospace engineering; Attitude control; Closed loops; Control methods; Control stability; Control systems design; Disturbance observers; Dynamic models; Estimation; Fuzzy control; Morphing; Multivariable control; Robustness; Sliding mode control; Stability analysis
• ISSN: 0018-9251; 1557-9603
• DOI: 10.1109/TAES.2024.3404911

This article develops a fuzzy disturbance observer-based fixed-time control technique to solve the attitude-tracking problems for hypersonic morphing vehicles (HMVs). According to the dynamic model of HMVs, the control-oriented model is established to simplify the design procedure. Fuzzy fixed-time disturbance observers are proposed for high-precision and fast disturbance estimation. The attitude controller is developed based on multivariable sliding mode control and fixed-time stability technique. Compared with the conventional fixed-time control methods, this article adopts variable exponent coefficients to achieve fixed-time stability. The controller will be obtained without lengthy inner and outer loop design procedures. The closed-loop stability is proved via Lyapunov synthesis. Finally, several scenarios are designed to assess performance.