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Inertia/gravity combined navigation semi-physical object simulating device

A technology of combined navigation and simulation device, applied in directions such as navigation through speed/acceleration measurement, can solve problems such as high cost, large size of gravity-assisted navigation system, complex structure, etc., achieve low cost, improve evaluation ability and demonstration effect, Experiment with quick results

Inactive Publication Date: 2009-05-06
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gravity-assisted navigation system developed by the United States is not only large in size and complex in structure, but also very expensive

Method used

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  • Inertia/gravity combined navigation semi-physical object simulating device
  • Inertia/gravity combined navigation semi-physical object simulating device
  • Inertia/gravity combined navigation semi-physical object simulating device

Examples

Experimental program
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Embodiment Construction

[0015] Inertial measurement unit 1 adopts 3 quartz flexible accelerometers, 3 fiber optic gyroscopes, AD conversion module, large-scale programmable logic gate array FPGA, floating point digital signal processor DSP, central processing unit MCU, I / O interface circuit and power supply, FPGA realizes the logic circuit of collecting gyroscope and accelerometer signal, dual-port RAM and DSP, the function of DSP is to read gyroscope and accelerometer data from FPGA, carry out digital signal processing, strapdown navigation solution, and The calculated navigation parameters are written into the FPGA, and the MCU communicates with the DSP through the dual-port RAM, and is responsible for data acquisition and other input and output tasks. Gravity meter simulator 2 is composed of high-precision accelerometer gravity sensor, PC104 computer, I / O interface circuit and power supply, which is equipped with global digital gravity anomaly map; digital gravity anomaly image 3 It is composed o...

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Abstract

The invention provides an inertia gravity combined navigation semi-physical simulator which is a device suitable for the theoretical method and engineering application research of an inertia / gravity combined navigation system. A path generator generates ideal data inputted to an inertia measuring unit, a gravimeter simulator, a Doppler log simulator, a deep sounding apparatus simulator and a combined navigation computer; wherein the gravimeter simulator comprises a gravity sensor, a chart of digital gravity anomaly, and a computer; the Doppler log simulator comprises a Doppler log and a computer; the deep sounding apparatus simulator comprises a deep sounding apparatus and a computer; the combined navigation computer is realized by an industrial computer, the synchronous control of the path generator, the inertia measuring unit, the gravimeter simulator, the Doppler log simulator and the deep sounding simulator is realized by a serial port, the transmission and receiving of information are performed on the inertia measuring unit, the gravimeter simulator, the Doppler log simulator and the deep sounding apparatus simulator, the combined navigation calculation and estimation analysis are performed, and the result is displayed through a terminal.

Description

technical field [0001] The invention is a combined navigation semi-physical simulation device, which is suitable for the theoretical method and engineering application research of the inertial / gravity combined navigation system. Background technique [0002] The development of today's society requires carrier navigation systems to be able to achieve high-precision, autonomous, all-weather, and silent navigation. For example, surface ships, ground vehicles, and aerial vehicles can navigate without relying on GPS, and underwater vehicles can float to the water surface and Realize long-term high-precision navigation without sending out signals, etc. In order to realize autonomous navigation, inertial navigation system is generally used, which can provide a variety of navigation information such as heading, speed, position and attitude in real time. However, the positioning error of the inertial navigation system will accumulate over time, and it needs to be corrected regularly...

Claims

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Application Information

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IPC IPC(8): G01C21/16
Inventor 蔡体菁
Owner SOUTHEAST UNIV
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