This paper addresses the development of an autonomousguidance, navigation and control system for a flatsolid circular parachute. This effort is a part of the AffordableGuided Airdrop System (AGAS) that integratesa low-cost guidance and control system intofielded cargo air delivery systems. The paper describesthe AGAS concept, its architecture and components. Itthen reviews the literature on circular parachute modelingand introduces a simplified model of a parachute.This model is used to develop and evaluate the performanceof a modified bang-bang control system tosteer the AGAS along a pre-specified trajectory towardsa desired landing point. The synthesis of the optimalcontrol strategy based on Pontryagin's principle of optimalityis also presented. The paper is intended to be asummary of the current state of AGAS development.The paper ends with the summary of the future plans inthis area.
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