Accurate control rocket recovery cable system based on unscented Kalman filter

A traceless Kalman, precise control technology, applied in the aerospace field, can solve problems such as limiting the development of the landing leg vertical recovery scheme, and achieve the effect of reducing mass and technical difficulty, strong energy absorption capacity, and reducing maximum overload

Pending Publication Date: 2022-07-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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AI Technical Summary

Problems solved by technology

Strict requirements on landing status and high technical difficulties in software and hardware have resulted in more than 90% of Falcon 9 first-level recovery failures occurring in the landing section, which also limits the development of research on landing leg vertical recovery schemes in my country. Therefore, it is necessary to propose independent innovations my country's rocket recovery program promotes the development of reusable space delivery systems

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  • Accurate control rocket recovery cable system based on unscented Kalman filter
  • Accurate control rocket recovery cable system based on unscented Kalman filter
  • Accurate control rocket recovery cable system based on unscented Kalman filter

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Embodiment Construction

[0269] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0270] like figure 1 , The precise control rocket recovery cable system based on unscented Kalman filter includes four parts: ground recovery cable device 1, landing rocket 2, following capture control system 3 and hydraulic buffer device 4. like figure 2 As shown, the whole recovery process is divided into an active follow-up capture stage and a passive deceleration buffer stage.

[0271] like image 3 As shown, the ground recovery cable device is built on four vertical rigid supports 1.1, and four smooth straight slide rails 1.2 are respectively connected to two adjacent supports 1.1, and a square recovery area is constructed in the oxy surface at a certain height from the ground. Put a slider 1.3 on each smooth guide rail 1.2, the slider can only slide along the guide rail, and the sliding range is the length of the entire guide rail, so the captur...

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Abstract

The invention aims to provide a precise control rocket recovery cable system based on an unscented Kalman filter, and the system is suitable for capturing, decelerating and buffering various types of reusable rockets in a landing stage, and can ensure the safety and stability of a rocket recovery landing process in a non-ideal landing state. According to the system, a recovery cable is woven into a capturing frame, and the capturing frame is driven by a motor to actively follow and capture a landing rocket, so that the landing point deviation range and the landing attitude angle deviation range of the rocket are expanded; the technical requirements for the on-rocket navigation guidance control system are reduced, and the system can recover different landing rockets by adjusting the size of the capturing cable frame and the capability of the deceleration buffer system. The system has the advantages of being simple in structure, easy to implement, good in universality and low in technical difficulty, the success rate of rocket recovery is increased, and robust recovery is achieved.

Description

technical field [0001] The invention relates to a precise control rocket recovery cable system based on an unscented Kalman filter, belonging to the field of aerospace. Background technique [0002] Recycling and reusing rockets can greatly reduce the cost of launching rockets and exploring space. Since the 1950s, astronauts at home and abroad have gradually taken rocket recovery technology as a research hotspot and explored a variety of rocket recovery schemes. After SpaceX's Falcon 9 successfully recovered the first stage of the rocket and reused it, the landing leg vertical recovery scheme has become the main recovery method for most space agencies. However, the success of this method of recovery requires the rocket to reach the landing platform strictly in a vertical attitude, with zero lateral velocity and zero vertical velocity. In order to meet this requirement, the rocket's software and hardware supporting facilities need to meet: the rocket's engine needs to have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G5/00
CPCB64G5/00
Inventor 张欢宋晓东孙志成
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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