Cross adjustment method for reentry flight process of suborbital vehicle

Abstract

The invention discloses a cross adjustment method for reentry flight process of a suborbital vehicle. The method comprises the following steps: dividing suborbital reentry flight into a plurality of time periods, and establishing and utilizing a homomorphic prediction model for suborbital reentry flight so as to obtain time values of the time periods; by virtue of iteration of the homomorphic prediction model, obtaining design attack angle values which enables normal acceleration for vehicle reentry to fluctuate near a normal acceleration constraint value within the time periods; maintaining the normal acceleration for reentry flight of the suborbital vehicle to fluctuate near the normal acceleration constraint value in a dynamic balancing segment composed of the time periods so that the suborbital vehicle reaches the maximum velocity attenuation under normal acceleration restriction within the time periods, and obtaining the earliest cross adjustment time; and adding a velocity heeling angle after the earliest cross adjustment time so as to achieve the purpose of improving the capability for cross adjustment of suborbital reentry flight.

Description

technical field [0001] The invention relates to the technical field of guidance and control, in particular to a lateral adjustment method during the reentry flight of a suborbital vehicle. Background technique [0002] As the product of the organic combination of aviation and spaceflight, suborbital vehicles have the application advantages of providing regional coverage, emergency delivery and rapid response. Its active area—near space—is not only a threat to spacecraft, but also restricts aviation. It has become a new hotspot in the field of aerospace research and a growth point of strategic high technology. [0003] Aircraft reentry flight refers to the flight process of a spacecraft or aircraft re-entering the earth's atmosphere from the outside or edge of the earth's atmosphere until it lands. [0004] The re-entry flight process of the suborbital vehicle and the re-entry flight of the space shuttle have both similarities and different characteristics. The difference i...

AI Technical Summary

Problems solved by technology

[0008] The inventor found during the research process that in the existing method of lateral adjustment of the aircraft, when the lift direction is changed, the lift component in the vertical direction is reduced, which will make the aircraft fall faster, resulting in an increase in the normal overload

However, due to the large normal overload of suborbital vehicles, the existing lateral adjustment method is not suitable for suborbital vehicles

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