A Miniature Autonomous Space-Time Determination Unit for Satellites

Abstract

The invention provides a miniature autonomous space and time determination unit for a satellite. The miniature autonomous space and time determination unit for the satellite comprises an MEMS gyro, an MEMS accelerometer, a dual-core processor, a miniature atomic clock, a GNSS radio frequency chip and a communication interface unit chip. According to the miniature autonomous space and time determination unit for the satellite of the invention, a navigation mode featuring the fusion of the information of a miniature autonomous space and time determination unit, a global satellite navigation system and a star sensor is realized, and the miniature autonomous space and time determination unit, the global navigation satellite system and the star sensor complement each other and jointly complete positioning, navigation and time synchronization and other functions; the orthogonal installation of the three-axis MEMS gyroscope and the three-axis accelerometer and the high integration of the terminal are realized, so that the vibration resistance of the terminal equipment is improved; a rigid-flex board technology is adopted, so that the three-dimensional assembly of the terminal can be realized; and as for a space environment, in order to reduce the influence of overheating, the significant heat source dual-core processor is quickly connected with a structure shell through a flexible heat-conducting sheet, so that rapid conduction and heat dissipation can be facilitated. The miniature autonomous space and time determination unit provided by the invention has the advantages of high precision, good real-time performance, high anti-impact capability and the like.

Description

technical field [0001] The invention relates to a miniature autonomous space-time determination unit for satellites, which belongs to the field of attitude control and timing. Background technique [0002] Autonomous space-time determination technology is the key technology for autonomous determination of time and space information. With the development of micro-nano satellite formation technology, the dependence on spatio-temporal information has surpassed any previous period, and when and where is one of the issues that people are most concerned about. Autonomous space-time determination technology serves the national economy, national security and military fields, and is a remarkable symbol of comprehensive national strength and international status. [0003] Global navigation satellite system (GNSS) is the most widely used technology for determining spatio-temporal information. Since the deployment of GPS in 1989, satellite navigation applications have become increasin...

AI Technical Summary

Problems solved by technology

However, GNSS is an active positioning technology, which has many disadvantages and is prone to problems such as signal interruption

The current inertial navigation and high-precision clock technologies generally have a series of usage restrictions such as large volume and weight, and high power consumption.

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