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

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.

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 ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, the problem that the prior art cannot realize the high-precision proportional guidance of the detector in the non-equivalent non-parallel gravitational field, the present invention provides a non-parallel gravitational field depth sensor based on proportional guidance. A method for air impact control, the method comprising:

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