Method for controlling horizontal position of carrier rocket returning body

Abstract

The invention relates to a carrier rocket return body horizontal position control method, which comprises the following steps of: before a sublevel enters a landing section, interpolating horizontal direction positions Xfscx and Zfscx and horizontal direction speeds Vxfscx and Vzfscx under a drop point coordinate system according to a standard trajectory; carrying out filtering processing on horizontal direction positions Xfs and Zfs and horizontal direction speeds Vxfs and Vzfs which are measured and output by the rocket navigation system; calculating an acceleration instruction controlled in the horizontal direction by using the measurement information Xfslb, Zfslb, Vxfslb and Vzfslb after filtering processing; calculating an attitude angle control instruction of the rocket according to the pitch direction acceleration instruction ay and the yaw direction acceleration instruction az of the sublevel; and by using the obtained pitch attitude angle instruction and the yaw attitude angle instruction psi cx, controlling the flight of the first sub-stage according to an attitude control method until the engine of the first sub-stage is landed and shut down. The method has the following predictable technical effects that the control instruction calculation amount is small, and the guidance loop stability and the engineering application value are high.

Description

technical field [0001] The present application relates to the technical field of recovery of liquid carrier rockets, in particular to a method for controlling the horizontal position of a carrier rocket return body. Background technique [0002] With the rapid development of commercial spaceflight, commercial launch vehicles are launched more and more times, which puts forward higher requirements on the launch cost of launch vehicles. [0003] Liquid carrier rocket recovery technology has become one of the main application directions at present. Using the first sub-stage of the rocket as a recycling body, recycling and using the first sub-stage of the rocket can effectively reduce the launch cost of the carrier rocket and promote the aerospace industry and its The rapid development of related industries. Generally, the recovery of liquid launch vehicles is mainly the recovery of the first sub-stage of the rocket. After the first sub-stage is separated from the other sub-st...

AI Technical Summary

Problems solved by technology

[0005] In order to improve the problems of the common horizontal position control method before landing of rockets, such as the large amount of control command calculation, the relatively low stab

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