Quartic polynomial guidance method for accurate vertical soft landing of VTOL carrier rocket substage landing phase

Abstract

The invention brings forward a quartic polynomial guidance method for accurate vertical soft landing of VTOL carrier rocket substage landing phase, belonging to technical field of guidance and control. A fourth-order polynomial guidance method for accurate vertical soft landing of a substage landing section of a vertical take-off and landing carrier rocket belongs to the technical field of guidance and control. In this method, the vector rocket motor is used as the actuator, and the guidance commands of high precision vertical soft landing in the rocket landing phase are obtained by using thequartic polynomial method, which is based on the substage states output from the on-board navigation system and the preset landing point positions of the target landing field. The accurate vertical soft landing guidance method for VTOL carrier rocket substage landing section can realize the accurate vertical soft landing of rocket substage.

Description

technical field [0001] The invention relates to a quaternary polynomial guidance method for precise vertical soft landing of a sub-stage landing section of a vertical take-off and landing carrier rocket, and belongs to the technical field of guidance and control. Background technique [0002] The cost of the launch vehicle is mainly concentrated in the rocket body, engine and equipment on the rocket. The fuel quality cost of the rocket is relatively low. Since the launch vehicle in service in my country can only be used once, the rocket body is discarded after launch, which also leads to The current rocket launch costs remain high. Therefore, the development of vertical take-off and landing carrier rockets, the vertical recovery of carrier rocket sub-stages, and reuse after maintenance can greatly reduce the launch cost of carrier rockets. The final stage of recovery of the vertical take-off and landing launch vehicle sub-stage (that is, the vertical landing stage) needs to ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low precision of the vertical soft landing of the sub-stage of the existing vertical take-off and landing carrier rocket in the final stage of return and landing, and to provide a vertical take-off and landing vehicle with a vector rocket motor (which can swing in all directions) as the executive mechanism. The technical scheme adopted for the precise vertical soft landing quaternary polynomial guidance method in the landing stage of the launch vehicle sub-stage is as follows:

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