Aerospace vehicle re-entry guidance method capable of carrying out real-time analysis and construction

Abstract

The invention discloses an aerospace vehicle re-entry guidance method capable of carrying out real-time analysis and construction. The method comprises the following steps that: 1) after the trajectory dip angle of the vehicle is zero, determining the corridor upper bound and the corridor lower bound of vehicle energy-drag acceleration; 2) generating a vehicle energy and drag acceleration characteristic profile; 3) correcting the vehicle energy and drag acceleration characteristic profile, and obtaining the correction amount of the vehicle energy and drag acceleration characteristic profile; 4) analyzing and constructing a re-entry guidance model; and 5) determining a vehicle dip angle instruction, and finishing vehicle re-entry guidance work. The guidance method disclosed by the inventionhas the advantages of being good in adaptive ability, high in accuracy, simple in calculation and easy in engineering implementation.

Description

technical field [0001] The invention relates to an aerospace vehicle reentry guidance method with real-time analytical structure, belongs to the technical field of guidance control, and is particularly suitable for the guidance of the reentry section of aerospace vehicles, reusable vehicles and hypersonic vehicles. Background technique [0002] An aerospace vehicle (Aerospace Vehicle, ASV) is a new type of aircraft that can work in both the aviation field and the aerospace field. It combines aviation technology and aerospace technology. The aerospace vehicle can take off horizontally like an ordinary aircraft, fly in the atmosphere at hypersonic speed, and can be directly accelerated into the earth orbit to become a space vehicle. After returning to the atmosphere, it will land at the airport like an airplane. [0003] The reentry stage is an important stage in the return and landing process of the aerospace vehicle, and it is an important guarantee for the safe return and s...

AI Technical Summary

Problems solved by technology

The standard ballistic reentry guidance method based on the drag acceleration profile adopted by the space shuttle is difficult to get rid of the inherent defects of poor robustness and adaptability

In order to meet the demanding requirements of the new generation of aerospace vehicles for autonomy, accuracy, safety and reliability, countries around the world have carried out a large number of research and verification of new lift-type re-entry guidance methods, and the typical one is the improved acceleration re-entry guidance method. However, this method uses a resistance acceleration profile composed of three linear curves, which limits the re-entry flight capability of the aircraft. At the same time, because the three curves are discontinuous, it is not conducive to the aircraft to track the reference resistance profile. In addition, the search algorithm used is more expensive. machine time

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