Spacecraft cluster only-ranging relative navigation method based on consistency filtering

Abstract

The invention discloses a spacecraft cluster only-ranging relative navigation method based on consistency filtering. According to the method, measurement sensors are not added to members of the spacecraft cluster, and related orbital maneuvers are not performed. Under the condition that the absolute orbit is unknown, only only-ranging relative navigation of the spacecraft cluster can be realized by constructing the consistency expansion Kalman filter only by relying on the lever arm effect of the communication receiver antenna which is installed to deviate from the spacecraft mass center and the geometric topological constraint between cluster members. The method comprises: performing evolution of a relative orbit by taking a relative orbit motion equation among members of a spacecraft cluster as a navigation state equation; taking relative distance information measured in a receiver TOA mode installed in a manner of deviating from the mass center of the spacecraft as a measurement quantity; introducing geometric topology information among the members of the cluster as a consistency constraint; and designing a consistency-based extended Kalman filter to finish only-ranging relativenavigation of the spacecraft cluster.

Description

technical field [0001] The invention belongs to the technical field of space autonomous relative navigation, and in particular relates to a distance-only relative navigation method for spacecraft clusters based on consistency filtering. Background technique [0002] In recent years, with the development of aerospace technology and the promotion of military and civilian needs, the mode of completely relying on a single large spacecraft to achieve a specific task has gradually shifted to the mode of relying on the coordination of multiple small and medium spacecraft clusters, such as the Earth Observation Space-based synthetic aperture radar, etc. Through the cluster mode, the weight and cost of a single launch can be reduced, and the system can continue to work when individual members fail, improving the reliability and stability of the entire system. [0003] The premise of swarm spacecraft to complete specific tasks is the maintenance and reconfiguration control of swarm c...

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Problems solved by technology

[0009] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for relative navigation of spacecraft clusters based on consistency filtering, which is reasonable in design, simple in operation, and capable of maneuvering in spacecraft without special orbits. Without the use of complex dynamics for orbit evolution and the addition of spaceborne data link antenna receivers, the spacecraft cluster can be realized only by relying on the lever-arm effect of the receiver's installation off the center of mass and the topology information of the cluster configuration. autonomous relative navigation

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