This paper presents a novel predefined-time attitude-control framework for fixed-wing aircraft with over-actuated systems, solving aerodynamic uncertainties and nonlinear couplings during high-angle-of-attack flight. The proposed methodology integrates a Predefined-Time Extended State Observer (PTESO) with a Predefined-Time Control Laws (PTCL), which ensures the convergence of the control system within predefined time intervals. Simulation results rigorously validate that the predefined-time parameters directly govern the convergence speed and control smoothness. Aligning with the control allocation method, the PTESO–PTCL framework thus provides an integrated control solution that enables explicit and predictable tuning of the error convergence time.
Chen et al. (Fri,) studied this question.