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Fiber-optic gyroscope strapdown inertial navigation computer based on DSP (Digital Signal Processor) and navigation calculating method thereof

A strapdown inertial navigation and fiber optic gyro technology, applied in the field of inertial navigation computers, can solve the problems of low navigation calculation efficiency and complex structure, and achieve the effects of low power consumption, strong computing power, and fast acquisition speed

Inactive Publication Date: 2013-09-25
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low navigation solution efficiency and complex structure of the current strapdown system inertial navigation computer. The present invention provides a navigation solution method of a fiber optic gyro strapdown inertial navigation computer based on DSP

Method used

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  • Fiber-optic gyroscope strapdown inertial navigation computer based on DSP (Digital Signal Processor) and navigation calculating method thereof
  • Fiber-optic gyroscope strapdown inertial navigation computer based on DSP (Digital Signal Processor) and navigation calculating method thereof
  • Fiber-optic gyroscope strapdown inertial navigation computer based on DSP (Digital Signal Processor) and navigation calculating method thereof

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specific Embodiment approach 1

[0025] Specific implementation mode one: combine figure 1 Describe this embodiment, the fiber optic gyroscope strapdown inertial navigation computer based on DSP described in this embodiment,

[0026] It includes FPGA data acquisition module 1, DSP module 2, storage module 3 and communication module 4;

[0027] The DSP module 2 is connected with the FPGA data acquisition module 1 through the EMIFB interface, the storage signal input and output terminals of the storage module 3 are connected with the storage signal input and output terminals of the DSP module 2, and the communication signal input and output terminals of the communication module 4 communicate with the DSP module 2 Signal input and output connections;

[0028] The DSP module 2 is realized by using the chip TMS320C6713.

[0029] The FPGA data acquisition module is mainly composed of FPGA and its configuration circuit, and completes the acquisition of three-way gyroscope and three-way accelerometer navigation dat...

specific Embodiment approach 2

[0037] Specific embodiment two: this embodiment is a further limitation of the fiber optic gyroscope strapdown inertial navigation computer based on DSP described in specific embodiment one, and the storage module 3 includes an SD card circuit, an EEPROM circuit and a NAND Flash circuit;

[0038] The SD card circuit is used to store system data,

[0039] The EEPROM circuit is used to store solution-related data,

[0040] NAND Flash circuit is used to store control program data.

specific Embodiment approach 3

[0041]Specific embodiment three: this embodiment is a further limitation of the DSP-based fiber optic gyro strapdown inertial navigation computer described in specific embodiment one, and the communication module 4 includes a serial-to-parallel conversion module, a first RS485 / 422 bus and a second Two RS485 / 422 bus;

[0042] The GPS / log of the fiber optic gyro strapdown inertial navigation exchange data with the serial-to-parallel conversion module through the second RS485 / 422 bus;

[0043] The upper computer of the fiber optic gyro strapdown inertial navigation exchange data with the serial-to-parallel conversion module through the first RS485 / 422 bus;

[0044] The navigation solution signal input and output terminals of the serial-to-parallel conversion module are connected with the navigation solution signal input and output terminals of the DSP module 2;

[0045] The acquisition control signal output end of the serial-to-parallel conversion module is connected with the ac...

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Abstract

The invention discloses a fiber-optic gyroscope strapdown inertial navigation computer based on a DSP (Digital Signal Processor) and a navigation calculating method thereof and relates to an inertial navigation computer of a strapdown system which aims at solving the problems that a conventional inertial navigation computer of the strapdown system is low in navigation calculating efficiency and complicated in structure. A hardware platform of the inertial navigation system which takes a chip TMS320C6713 as a core and an FPGA (Field Programmable Gate Array) as assistance can be used for completing data acquisition, data processing and data communication tasks. The calculating method disclosed by the invention can be used for calibrating a misalignment angle between a real navigation coordinate system and a calculated navigation coordinate system and compensating to obtain an initial strapdown matrix; by adopting a quaternion method, according to angular velocity information and acceleration information, quaternion can be corrected in real time and normalized, and then velocity and location information of a carrier can be obtained by calculating the posture through the obtained strapdown matrix. The fiber-optic gyroscope strapdown inertial navigation computer based on the DSP and the navigation calculating method are applicable to the fiber-optic gyroscope strapdown inertial navigation system.

Description

technical field [0001] The invention relates to a strapdown system inertial navigation computer, in particular to a DSP-based optical fiber gyro strapdown inertial navigation computer and a navigation solution method thereof. Background technique [0002] With the rapid development of microelectronics technology and the increasing demand for digital signal processing applications, DSP controllers have emerged as the times require. It is a microcontroller dedicated to processing digital signal processing algorithms. The application of DSP in the strapdown inertial navigation system can give full play to the high-speed data processing, data storage, data transmission and other capabilities of DSP, so as to complete digital filtering, navigation calculation, data communication and other tasks, so that the navigation system can be better developed. The performance of the system can be further improved, the stability of the system can be enhanced, the power consumption of the sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
Inventor 周广涛陶晨斌王国臣吴磊郭善强张润峰李海军
Owner HARBIN ENG UNIV
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