Unmatched Perturbation Accommodation for an Aerospace Launch Vehicle Autopilot Using Dynamic Sliding Manifolds

TL;DR

This paper introduces a dynamic sliding manifold approach to improve the robustness of launch vehicle autopilot control during atmospheric flight, effectively handling unmatched disturbances and outperforming conventional methods.

Contribution

It presents a novel dynamic sliding manifold technique for unmatched disturbance accommodation in aerospace launch vehicle autopilots.

Findings

Enhanced stability and robustness demonstrated in simulations.

Superior disturbance rejection compared to traditional sliding mode control.

Effective handling of unmatched perturbations during atmospheric flight.

Abstract

Sliding mode control of a launch vehicle during its atmospheric flight phase is studied in the presence of unmatched disturbances. Linear time-varying dynamics of the aerospace vehicle is converted into a systematic formula and then dynamic sliding manifold as an advanced method is used in order to overcome the limited capability of conventional sliding manifolds in minimizing the undesired effects of unmatched perturbations on the control system. At the end, simulation results are evaluated and the performance of two approaches are compared in terms of stability and robustness of the autopilot.