Multi-stage health state acquisition method for low-orbit remote sensing satellite navigation positioning system

Abstract

The invention provides a multi-stage health state acquisition method for a low-orbit remote sensing satellite navigation positioning system. The multi-level health management comprises: equipment-level health management and system-level health management; wherein the equipment-level health management comprises equipment operation health management and equipment function health management; the system-level health management comprises: a navigation positioning system operation health management and navigation positioning system function health management. The implementation body of the system-level health management comprises a satellite-borne computer, an orbit control subsystem and a payload subsystem, wherein information interaction exists between the satellite-borne computer and a navigation and positioning system in a low-orbit remote sensing satellite. The invention provides a multistage health management method for a low-orbit remote sensing satellite navigation positioning system. Compared with single-level health management, the management means are more diverse, the health state is more comprehensively reflected, the limitation of fault handling in single-level health management is solved, and on-orbit autonomous safe operation of the low-orbit remote sensing satellite can be more powerfully guaranteed.

Description

technical field [0001] The invention relates to a health management method of an on-board navigation and positioning system, in particular to a multi-level health management method of a low-orbit remote sensing satellite on-board navigation and positioning system. Background technique [0002] Low-orbit remote sensing satellites are widely used in surveying and mapping, resource investigation, environmental monitoring and other fields. High-precision satellite time, in-orbit position, speed and related derivative information help to improve the quality of image data acquired by payloads. Therefore, my country's current The low-orbit remote sensing satellites developed are generally equipped with on-board navigation and positioning systems to provide the above-mentioned satellite time and orbit-related information. The on-orbit navigation and positioning system is in a high-speed calculation state for a long time, and the space environment in which the low-orbit remote sensing...

AI Technical Summary

Problems solved by technology

[0004] However, limited by the orbital height and the ground measurement and control station, the controllable arc section of the ground for low-orbit remote sensing satellites is very limited.

On the one hand, the ground may not be able to monitor the non-persistent faults that occur outside the arc; on the other hand, relying entirely on the ground to conduct uplink command control after a series of analysis and diagnosis to identify the fault, the timeliness is poor, causing a delay in fault repair and long-term Optimum realization of time-affected remote sensing satellite functions

[0005] The existing technology only provides a single-level monitoring method for certain types of faults in the spaceborne navigation and positioning system, and does not involve the multi-level health status information monitoring and health management of low-orbit remote sensing satellites for the entire operation process of the navigation and positioning system. At present, there are also No patent yet covers this multi-level health management method

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