Integrated navigation system based on GGI/GPS/INS

Abstract

The invention discloses an integrated navigation system based on GGI / GPS / INS. The system is composed of a sensor module, an integrated navigation resolving module and a real-time displaying module and is characterized in that the sensor module comprises an inertial sensor module and a GPS satellite signal receiver module, the integrated navigation resolving module comprises strapdown navigation module, a gravity gradient auxiliary module, an unequal-interval kalman filtering module and a position and speed correcting module, and the real-time displaying module is formed by a three-dimensional real-time display module. The integrated navigation system disclosed by the invention can improve locating precision, and the locating precision is hardly affected by environmental change.

Description

technical field [0001] The invention belongs to the technical field of integrated navigation, and in particular relates to an integrated navigation system based on GGI / GPS / INS. Background technique [0002] At present, the navigation system has penetrated into the daily life, and there are more and more fields where the system is applied. Our country has also invested a lot of manpower and material resources in research, and it has broad application prospects in aerospace, transportation, safety and fire protection and other fields. Existing navigation systems and integrated navigation systems generally have shortcomings such as large size, difficulty in integration, and poor accuracy. [0003] Traditionally used navigation systems (such as GPS navigation system, INS navigation system and astronomical navigation system, etc.) and integrated navigation systems (such as GPS / INS integrated navigation system, astronomical / INS integrated navigation, etc.) Positioning, when the e...

AI Technical Summary

Problems solved by technology

Existing navigation systems and integrated navigation systems generally have shortcomings such as large size, difficulty in integration, and poor accuracy. They are difficult to meet the development needs of micro-miniature systems, and do not meet the urgent needs of military equipment development.

[0003] Traditionally used navigation systems (such as GPS navigation system, INS navigation system and astronomical navigation system, etc.) and integrated navigation systems (such as GPS / INS integrated navigation system, astronomical / INS integrated navigation, etc.) Positioning, when the electromagnetic wave signal is weak or even absent, it is impossible to accurately locate objects, such as indoor positioning

At present, the commonly used indoor positioning technologies on the market include: infrared indoor positioning technology, ultrasonic indoor positioning technology, Bluetooth indoor positioning technology, Zig Bee indoor positioning technology, WiFi indoor positioning technology, ultra-wideband indoor positioning technology, etc., but these positioning methods are limited to other Due to technical reasons such as low precision and insufficient algorithm precision, precise positioning cannot be achieved

[0004] When the environment changes, the traditional positioning system cannot achieve accurate positioning, and the positioning error may be large or even impossible.

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