All-day optical navigation method and device based on combination of fixed star and satellite

Abstract

The invention discloses an all-time optical navigation method and device based on the combination of a fixed star and a satellite, and the method comprises the steps: observing the fixed star through a star sensor in a first preset time period, and obtaining a first optimal attitude matrix; observing a satellite by using an infrared optical sensor to obtain a first satellite observation equation; constructing a first index function through elevation information obtained by coupling prior information and a barometer; obtaining a first optimal longitude and latitude; in a second preset time period, observing the sun by using a sun sensor to obtain a sun observation vector; establishing an angle constraint equation of a sun observation unit vector and a satellite observation unit vector; constructing a second index function according to elevation information obtained by coupling prior information and a barometer to obtain a second optimal longitude and latitude; and obtaining a second optimal attitude matrix according to the satellite observation vector of the satellite observation equation and the sun observation vector. According to the invention, high-precision all-time navigation in a satellite radio denial environment is realized, and the problem that radio is disturbed and deceived is effectively solved.

Description

Technical field [0001] The present invention relates to the field of navigation technology and aerospace technology, in particular to a full-day optical navigation method and apparatus based on the combination of stars and satellites. Background [0002] China Aerospace Science and Technology Group's "Rainbow" solar drone, the United States Facebook's "Aquila" solar drone, Europe's Airbus "God of the West Wind" solar drone and other long-endurance solar drones, can continue to fly in the atmosphere for several months, flight altitude of up to 20 kilometers, is a revolutionary aircraft, can be used as a "high-altitude pseudo-satellite", in the regional reconnaissance, environmental monitoring, search and tracking, information collection, broadband communications, There are broad application prospects in the fields of spatio-temporal Internet of Things services and the emergency provision of external communication services in the event of major disasters. The existing long-enduran...

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Problems solved by technology

[0005] For this reason, the object of the present invention is to solve the high-precision all-time navigation problem under the satellite radio rejection environment, and proposes a kind of all-time optical navigation method based on the combination of stars and satellites

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