Autonomous navigation semi-physical simulation test system based on biconical infrared and star sensors

Abstract

The invention relates to an autonomous navigation semi-physical simulation test system based on biconical infrared and star sensors. The biconical infrared earth sensor is used for observing a dual-string-width earth simulator, the star sensor is used for observing a dynamic fixed star simulator, and a measurement signal is sent to a navigation computer; an attitude orbit simulator is used for calculating a satellite attitude orbit and sending the satellite reference orbit attitude data to a control computer; the control computer, according to the reference attitude orbit data, generates a string-width control instruction to control the string width of the earth simulator and an inertial quaternion instruction to control a star map of the dynamic fixed star simulator to change; and the navigation computer, according to the measurement signal, performs navigation filtering calculation to obtain a satellite position estimation value and a speed estimation value, and compares the satellite position estimation value and the speed estimation value with the reference data to obtain navigation accuracy. According to the autonomous navigation semi-physical simulation test system based on the biconical infrared and star sensors provided by the invention, the semi-physical simulation verification test for real measurement data of a hardware in a loop based on the biconical infrared and star sensors is realized, and the performance of the full-autonomous navigation system for a satellite can be effectively verified on the ground.

Description

technical field [0001] The invention relates to an autonomous navigation simulation test system, in particular to a semi-physical simulation test system for autonomous navigation based on bicone infrared and star sensors, belonging to the technical field of autonomous navigation. Background technique [0002] Autonomous navigation technology means that the satellite can determine the position and velocity of the satellite in real time only by on-orbit measurement equipment without relying on the support of the ground system, also known as autonomous orbit determination. For satellite systems, autonomous navigation is beneficial to reduce the dependence of satellites on the ground and improve the survivability of the system. For example, in wartime, when the ground measurement and control station is destroyed and interfered by the enemy, the orbit can still be determined and maintained. This is of great significance for military satellites. In addition, autonomous navigation...

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Problems solved by technology

In China, a lot of research has been done on satellite autonomous navigation technology based on infrared earth information, such as "Infrared Earth Sensor Measurement Value Correction Algorithm and...

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