Multi-sensor combined navigation system for aviation

Abstract

The invention relates to a multi-sensor combined navigation system for aviation, and the system comprises an MSINS unit, a GPS unit, a magnetic compass unit, a liquid crystal display unit, a data transmission interface unit, a combined navigation computer, a data storage unit and a power supply device. The MSINS unit is used for acquiring signals of an accelerometer and a gyroscope, carrying out filtration and amplification and sending the signals to a DSP for carrying out algorithm processing; a GPS module is used for outputting longitude, latitude, altitude and velocity values of X, Y and Z axes based on a geocentric coordinate system measured by the GPS; the magnetic compass unit is used for outputting three-dimensional attitude information measured by a three-axis magnetic compass; the combined navigation computer is used for receiving signals outputted by an inertial measurement unit, the GPS module and the magnetic compass, applying the federated Kalman filtering algorithm to carry out fusion treatment on data and obtaining combined navigation data; and the data storage unit is used for saving original data and result data. The system has the advantages of small volume, low cost, high reliability and high precision.

Description

Technical field: [0001] The invention relates to an integrated navigation and positioning system, in particular to an aviation multi-sensor integrated navigation system. Background technique: [0002] Since the 1990s, with the emergence and rapid development of micro / nano technology, MEMS (Micro Electromechanical System, MEMS for short) technology developed from semiconductor integrated circuit (IC) technology has gradually matured. This technology can be used to make a variety of micro sensors that can be sensitive and detect mechanical, magnetic, thermal, chemical and biomass. These sensors have small volume and energy consumption, can realize many new functions, and are convenient for mass production. And precise production, low cost per piece, easy to form large-scale and multi-functional arrays. The micro inertial measurement combination includes a micro gyroscope and a micro accelerometer, which is the successful application of MEMS technology in the field of inertial...

AI Technical Summary

Problems solved by technology

However, the disadvantage of GPS is that its autonomy is poor, it is easy to be interfered, and the frequency of data update is low. When used alone, it is difficult to meet the requirements of high-speed and real-time navigation.

Although the accuracy has been greatly improved, due to the altimeter and magnetic compass (composed of a one-dimensional magnetic compass and a two-dimensional magnetic compass), the cost and system instability sources have also increased, and the system volume is relatively large

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