Preset-time robust adaptive stabilization control of shipborne helicopter landing platforms

The Shipborne Helicopter Landing Platform (SHLP) provides an effective solution for ensuring the safe landing of shipborne helicopters by compensating for ship motions induced by wind, waves, and currents. To address the stabilization control problem of the SHLP subject to compound disturbances caused by ship motions, dynamic uncertainties, and load perturbations, a preset-time robust adaptive stabilization control method is proposed. First, a novel barrier Lyapunov function is designed, which allows the convergence time for regulating the supporting surface of the SHLP to the desired horizontal position to be preset in advance. Then, an adaptive compound disturbance estimator is constructed to achieve online estimation of the compound disturbances acting on the SHLP. Finally, by integrating the backstepping design approach with a projection algorithm, a preset-time robust adaptive stabilization control law for the SHLP is developed. Numerical simulation results demonstrate the effectiveness and robustness of the proposed control method under compound disturbance conditions.