Vertical returning trajectory design method for carrier rocket

Abstract

The invention provides a vertical returning trajectory design method for a sub-stage of a carrier rocket. The method comprises: according to flight characteristics of a sub-stage of a carrier rocket, determining a vertical returning launching point or each sub-flight-phase of a vertical returning preset target position, using a three-freedom-degree kinetic model of a sub-stage vertical returning process on an earth spherical model, to generate a vertical returning ballistic trajectory, wherein each sub-flight-phase from sub-stage separation to sub-stage landing includes a posture alignment stage, a deceleration turning stage, a gliding stage, a power deceleration stage, a pneumatic deceleration stage, a vertical dropping stage, or a gliding posture alignment stage, a power deceleration stage, a deceleration stage, and a vertical dropping stage, the kinetic model being determined by flight speed, a trajectory inclination angle, a trajectory rotation angle, speed and position components in a launching coordinate system, an attack angle, a sideslip angle, and a variable thrust factor. The invention also provides a vertical returning trajectory design method for a carrier rocket booster stage and a carrier rocket. The vertical returning trajectory design methods are simple in operation and easy in engineering implementation. Track indexes of each obtained sub-flight-phase satisfy constraint requirements of heat flux peak, dynamic pressure, flight overload, and terminal positions.

Description

technical field [0001] The invention relates to a method for designing a vertical return trajectory of a carrier rocket, which belongs to the field of trajectory design. Background technique [0002] Vertical return is a sub-level recovery technology proposed to solve the problem of launch vehicle reuse. The vertical return technology means that after the rocket sub-stage completes the task separation, it will fly back to the landing field autonomously according to the set trajectory through its own control system and power plant, and land slowly and stably at the designated position of the landing field with a vertical rocket body attitude. . [0003] The vertical return ballistic design technology is to ensure that the sub-stage of the launch vehicle can safely return to the launch site for recovery after separation. According to the characteristics of the flight mission in the return segment, and on the basis of fully considering the special requirements of the vertical...

AI Technical Summary

Problems solved by technology

[0005] Although the Blue Origin company of the United States has announced a system and method for maritime recovery of a carrier rocket sub-stage, the patent number is US8678321, but it has not announced a specific trajectory design method for the return segment, and only announced a return to the predetermined target position The return segment ballistic mission profile

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