Development of a Payload Derived Position Acquisition System for Parachute Recovery Systems
NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL AND ASTRONAUTICAL ENGINEERING
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For parachute recovery systems PRS there is a requirement, for testing and operational use, to know the entire trajectory of the PRS. For testing, the trajectory is required to understand the opening characteristics and the flight performance of the PRS. For operational use, the trajectory information is utilized in real-time for the guidance and control of precision systems. Currently, there are certain limitations in how these trajectories are generated. The paper advocates the development of a Payload Derived Position Acquisition System PDPAS to overcome these problems. The PDPAS is an instrumentation set and software algorithm that is to be installed onto PRS in order to estimate PRS state vector parameters in real-time for testing and operational use. Ideally it needs to be done without continuous use of the Differential Global Positioning System receiver and should produce a six degree-of-freedom solution for the PRSs trajectory from aircraft exit to ground impact. The paper discusses the details of developed algorithms, results of computer simulations and processing of real drop data.
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