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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (15): 528762-528762.doi: 10.7527/S1000-6893.2023.28762

• Flight Mechanics and Guidance Control • Previous Articles     Next Articles

Attitude control scheme for morphing vehicles with output error constraints and input saturation

Haolan CHEN, Peng WANG(), Guojian TANG   

  1. College of Aerospace Science and Engineering,National University of Defense Technology,Changsha  410073,China
  • Received:2023-03-29 Revised:2023-04-28 Accepted:2023-05-19 Online:2023-08-15 Published:2023-05-22
  • Contact: Peng WANG E-mail:wonderful2035@163.com

Abstract:

The attitude control problem of hypersonic morphing vehicles considering output error constraints and input saturation is investigated. Firstly, the dynamic model with uncertainties is established, and the input-saturation-oriented control system is derived based on hyperbolic tangent function and auxiliary system. The transformed error is then designed for the system to facilitate output error constraints under more relaxed convergency conditions. Then, the Fuzzy Disturbance Observer (FDO) is designed based on fuzzy logic system and finite-time theory, which enables the estimation error of disturbance converging to the origin in finite time. Subsequently, the back-stepping control scheme is proposed and the convergency of the closed-loop system with output error constraints and input saturation is ensured via Lyapunov synthesis. Finally, numerical simulation results are presented to demonstrate the effectiveness of the designed control scheme.

Key words: morphing vehicle, output error constraint, input saturation, fuzzy disturbance observer, fuzzy logic system, finite-time theory

CLC Number: