Non-parallel gravitational field deep space impact control method and system based on proportional guidance

A proportional guidance and control method technology, applied in the aerospace field, can solve problems such as the inability to achieve high-precision proportional guidance of detectors, and achieve the effects of reducing fuel consumption, high control efficiency, and improving control accuracy

CN111674573BActive Publication Date: 2020-11-10BEIJING INST OF CONTROL & ELECTRONICS TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-11-10

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Abstract

The invention belongs to the technical field of aerospace, particularly relates to non-parallel gravitational field deep space impact control method and system based on proportional guidance, and aimsto solve the problem that high-precision proportional guidance of a detector in a non-equivalent non-parallel gravitational field cannot be realized in the prior art. The method comprises the steps of: acquiring a sight vector sequence of a target celestial body relative to a detector; calculating the current line-of-sight angular velocity of the target celestial body relative to the detector through numerical differentiation and filtering; constructing a relative kinetic model of the target celestial body and the detector in the non-equivalent non-parallel gravitational field; setting the positions and speeds of the detector and the target celestial body as initial values of the model, and obtaining a required sight line angular speed through integration; and calculating a to-be-accelerated speed vector by combining the relative position vector of the detector and the target celestial body according to the difference between the current sight line angular speed and the required sightline angular speed, and controlling the detector. The method is suitable for a non-equivalent non-parallel gravitational field environment, guarantees the guide precision and the guide efficiency ofthe detector, and reduces the fuel consumption.
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Description

technical field

[0001] The invention belongs to the field of aerospace technology, and in particular relates to a control method and system for deep-space impact of a non-parallel gravitational field based on proportional guidance. Background technique

[0002] In the field of deep space autonomous navigation, optical autonomous navigation systems have gained widespread attention due to their advantages in high technology maturity, small volume and weight, and low cost. The optical autonomous navigation system obtains the corresponding line-of-sight vector by identifying the image plane position of the image formed by the target celestial body, and obtains the sequence line-of-sight angle deviation through the sequence of images measured multiple times, and then obtains the estimated value of the position and speed of the detector through the filter estimation algorithm .

[0003] Proportional guidance technology is a traditional guidance method, which has been widely used ...

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Embodiment Construction

[0043] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, not to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

[0044] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0045] The invention provides a non-parallel gravitational field deep-space impact control method based on proportional guidance. The method is based on the measurement information of the optical autonomous navigation system, combined with the idea of ​​setting the line-of-sight angu...