Performance Enhancement of Compact High Order Sliding Mode Controller for Post LOC Autonomous Recovery of Flight Vehicles using Optimal Control Modification

摘要

Most In - flight upset flight regimes for aeronautical and aerospace vehicles are difficult to mitigate not just because of their strange natures but also because of their dependency to the type of flight vehicles. Most well known reconfiguration strategies and manned attempt techniques are solely based on design assumptions and also guesses that often don't addressed those require critical upset flight regimes.These flight regimes are highly nonlinear and are subject to the degeneracy of inputs - outputs coupling of embedded flight control laws inducing failure to fully maintain flying vehicles within their flyable protected envelope or get back after critical events are detected. Previous work had focus on the derivation of the compact In - flight autonomous recovery control law using variable structure control technique that constraints these flying vehicles once off nominal flight envelope to get back to their protected envelope while in these paper, we center our attention to its performance analysis and enhancement using intelligent control approach. Throughout the process, an adaptation control law is embedded to improve its estimation dynamic necessary to improve its overall performance and feasibility for real time implementation. The improved design is embedded to a Generic Transport Model(GTM) model for illustration of post LOC autonomous flight recovery regime.