Method for quickly determining spatial relative state under complex disturbance

Abstract

The invention discloses a method for quickly determining a spatial relative state under complex disturbance. The method comprises the steps of performing dimension expansion by selecting a dynamic state variable for describing the spatial relative motion, expressing a motion process and measurement as a nonlinear equation, and expressing the complex spatial disturbance as unconventional noise; performing upper bound estimation of a covariance matrix on recursion errors caused by inaccuracy of a kinetic model; and estimating and eliminating disturbance information contained in a measured valueby adopting an adaptive recursive optimization method so as to obtain spatial relative state information. According to the method, online real-time estimation can be performed on system process noisein the condition of spatial disturbance, and a result is transmitted to a relative state determination step for quick calculation.

Description

technical field

[0001] The invention relates to a technology in the field of satellite control, in particular to a method for quickly determining the relative state of space under complex disturbances. Background technique

[0002] Space missions such as satellite formation flight are mainly used in fields such as earth observation, precise positioning, astronomical observation, and electronic reconnaissance. These applications have high requirements for the accuracy of determining the relative state of space. In actual operation, the satellite will be affected by various complex interference forces such as the earth's non-spherical gravity, third-body gravity, solar light pressure, and atmospheric resistance. Under the influence of interference, the relative orbits of satellites flying in formation will change. Although these disturbance forces are very small compared with the gravitational force at the center of the earth, the long-term effect can still cause the satellite...

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