Booster navigation and positioning solving method applicable to high-dynamic rolling reentry

Abstract

The invention provides a booster navigation and positioning solving method applicable to high-dynamic rolling reentry. The booster navigation and positioning solving method comprises the following steps: (1) establishing a high-dynamic attitude solving equation according to an optimized three-subsample equivalent rotating vector method; (2) establishing a speed and position navigation solving model of a boosting returning section according to the high-dynamic attitude solving equation established by step (1); (3) establishing an error model of an MEMS (Micro-electromechanical Systems) inertialdevice; identifying errors of the MEMS inertial device according to the speed and position navigation solving model of the boosting returning section of step (2) and boosting reentry actual measurement data, so as to obtain a revised MEMS inertial device output result; and (4) substituting the revised MEMS inertial device output result obtained by step (3) into the speed and position navigation solving model of the boosting returning section of step (2) to realize navigation and positioning solving of a boosting reentry process. The algorithm has the advantages of high solving precision, short calculation period, capability of being adaptive to large-attitude maneuvering and the like, and can provide accurate navigation position information for a booster reentry section.

Description

technical field [0001] The invention relates to a navigation positioning solution method for a booster suitable for high dynamic rollover reentry, and belongs to the technical field of navigation guidance and control. Background technique [0002] All major aerospace countries and private aerospace companies in the world are actively carrying out the development and flight verification of reusable launch vehicles. With breakthroughs in key technologies such as rocket recovery structure, power, and control, development and flight risks and economic costs have been greatly reduced. The recovery and reuse of launch vehicles can not only greatly reduce launch costs, but also effectively control the flight debris to avoid loss of life and property. The booster of a traditional launch vehicle falls to the ground uncontrollably after the work is over, and the wreckage weighing several tons falls from the air to the ground with great destructive force. It is urgent to solve the pro...

AI Technical Summary

Problems solved by technology

[0004] During the fall of the booster, the attitude changes drastically, and the maximum angular velocity reaches 400° / s. Under the condition of high-speed rotation, the measurement error of the MEMS inertial device is further amplified, which seriously affects the accuracy of the navigation solution. The existing navigation The calculation algorithm is no longer suitable for this kind of high dynamic reentry vehicle

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