Positioning estimation method for spacecraft

Abstract

The invention discloses a positioning estimation method for a spacecraft, first, obtain an initial position and an initial speed of the spacecraft to be observed at a zero hour in an active segment by using the Beidou satellite; Second, build a simplified motion equation of the spacecraft to be observed in the active segment under a basic coordinate system, wherein the simplified motion equation of the spacecraft to be observed is solved, and a non-linear differential equation model which can determine an estimated position of the spacecraft to be observed is then built; at last, carry out solving on the built non-linear differential equation model by using an MATLAB software to obtain the estimated positions of the spacecraft to be observed at all time points in the active segment for positioning estimation. The positioning estimation method for spacecraft can realize the positioning estimation of the spacecraft in the active segment more accurately, reliably and independently and can provide a better basis for judging the positions and flight purposes of the spacecraft to be observed. This method is simple and practicable and has very strong practicability.

Description

technical field [0001] The invention relates to the technical field of aircraft position estimation, in particular to a space vehicle position estimation method. Background technique [0002] Spacecraft refers to all kinds of aircraft that basically operate in accordance with the laws of celestial mechanics in the space outside the earth's atmosphere. Some countries will launch special-purpose space vehicles, such as ballistic missiles and reconnaissance satellites. It is of great strategic significance to carry out positioning estimation, monitoring and rapid response to hostile space vehicles launched by other countries. [0003] For the traditional space vehicle positioning estimation method, in the process of detecting and obtaining the initial position and initial velocity of the space vehicle to be observed at time zero of the rocket-propelled active stage, traditional detection methods generally use infrared optical detectors for detection Acquisition, but it only r...

AI Technical Summary

Problems solved by technology

[0003] For the traditional space vehicle positioning estimation method, in the process of detecting and obtaining the initial position and initial velocity of the space vehicle to be observed at time zero of the rocket-propelled active stage, traditional detection methods generally use infrared optical detectors for detection Acquisition, but it only receives the infrared radiation information of the target, it can be oriented but not ranging, and it is susceptible to climate influence and cloud interference, and its reliability is not good enough

In addition, traditional space vehicle positioning estimation methods still have shortcomings such as the need for coordinate transformation, too many variables to be determined, complex calculations, and insufficient estimation accuracy.

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