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CPCI bus-based rotary strapdown system hardware platform and navigation calculation method therefor

A hardware platform, a technology for navigation and calculation, applied in navigation calculation tools and other directions, can solve the problems of low calculation frequency and poor anti-interference ability, and achieve the effect of high acquisition rate, enhanced anti-interference ability, and compact structure

Inactive Publication Date: 2013-09-04
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 system resolution frequency and poor anti-interference ability of the hardware platform of the cu

Method used

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  • CPCI bus-based rotary strapdown system hardware platform and navigation calculation method therefor
  • CPCI bus-based rotary strapdown system hardware platform and navigation calculation method therefor
  • CPCI bus-based rotary strapdown system hardware platform and navigation calculation method therefor

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specific Embodiment approach 1

[0031] Specific implementation mode one: combine figure 1 with figure 2 Describe this embodiment, the rotary strapdown system hardware platform based on CPCI bus described in this embodiment,

[0032] It includes fiber optic gyroscope signal and accelerometer signal acquisition module 1, signal fusion expansion board 2 and navigation calculation module 3;

[0033] Described signal fusion expansion board 2 comprises FPGA circuit 2-1, CPCI bridge chip 2-2 and CPCI bus interface circuit 2-9,

[0034] Optical fiber gyro signal and accelerometer signal acquisition module 1, used for collecting three-way gyro signals and three-way accelerometer signals, and sending the collected three-way gyro signals and three-way accelerometer signals to FPGA circuit 2-1;

[0035] The CPCI bridge chip 2-2 is used to realize the data exchange between the FPGA circuit 2-1 and the navigation solution module 3;

[0036] The CPCI bus interface circuit 2-9 is used to realize the conversion of the th...

specific Embodiment approach 2

[0046] Specific implementation mode two: combination figure 2 Describe this embodiment, this embodiment is the further limitation of the rotary strapdown system hardware platform based on CPCI bus described in specific embodiment one,

[0047] The signal fusion expansion board 2 also includes UART12-6, UART22-7, SDRAM2-3, configuration chip 2-4 and EEPROM2-5;

[0048] UART12-6 is used to realize the data communication between the FPGA circuit 2-1 and the rotary mechanism of the rotary strapdown system;

[0049] UART22-7, used to realize data communication between FPGA circuit 2-1 and GPS and DVL circuit of rotary strapdown system;

[0050] SDRAM2-3 is used to provide buffer space for all data received by FPGA circuit 2-1;

[0051] Configure chips 2-4 for storing configuration data;

[0052] EEPROM2-5 is used for storing configuration information of the CPCI bridge chip 2-2.

[0053] The FPGA circuit 2-1 completes the conversion of the data rate through the SDRAM 2-3, real...

specific Embodiment approach 3

[0058] Specific implementation mode three: combination image 3 Describe this embodiment, this embodiment is the further limitation of the rotary strapdown system hardware platform based on CPCI bus described in specific embodiment two,

[0059] The FPGA circuit 2-1 is embedded with an internal signal source detection point 2-1-1, a signal receiver, a dual-port RAM 2-1-3, a FIFO buffer module 2-1-6, a data control module 2-1-5, SDRAM controller 2-1-4, CPCI controller 2-1-10, rotating mechanism signal control module 2-1-9, combined navigation information interface module 2-1-8 and PLL module 2-1-7;

[0060] Internal signal source detection point 2-1-1, used to provide test signal output for external equipment;

[0061] The signal receiver is used to receive three-way gyroscope signals and three-way accelerometer signals;

[0062] Dual-port RAM2-1-3, used to convert the 8-bit data width of the received three-way gyro signal and three-way accelerometer signal into a 32-bit data...

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Abstract

The invention discloses a CPCI bus-based rotary strapdown system hardware platform and a navigation calculation method therefor, and relates to a hardware platform. The CPCI bus-based rotary strapdown system hardware platform solves the problem that the existing strapdown system hardware platform has low system calculation frequency and poor anti-interference capability. A signal fusion expansion board is used for high-speed transmission of three gyroscope signals and three accelerometer signals acquired by a fiber-optic gyroscope signal and accelerometer signal acquisition module, for control and feedback of positions of a rotary mechanism, for reception of integrated navigation information from outside, for fusion of the signals to eliminate the high-frequency noise influence on the signals, and for transmission of the fused three gyroscope signals and the three accelerometer signals to an FIFO buffer area of a CPCI bridge chip. A navigation calculation module accesses the FIFO buffer area of the CPCI bridge chip by a CPCI bus interface, carries out algorithmic error compensation and navigation calculation of the signals and outputs navigation signals. The CPCI bus-based rotary strapdown system hardware platform is used for a fiber-optic gyroscope rotary strapdown navigation system.

Description

technical field [0001] The invention relates to a hardware platform, in particular to a CPCI bus-based rotary strapdown system hardware platform and a navigation solution method thereof. Background technique [0002] The difference between the rotary strapdown system and the traditional strapdown system is that the inertial device of the system is fixedly connected to the carrier through the rotating mechanism instead of directly fixedly connected to the carrier. By adding a rotation and control mechanism outside the inertial element or IMU (Inertial Measurement Unit), and then use the rotation to modulate the influence of the inertial element drift on the navigation performance, so as to achieve the purpose of high-precision navigation. [0003] The CPCI bus is a high-performance industrial bus proposed by Ziatech in 1994. The CPCI bus is a combination of the PCI electrical protocol standard and the mature European-style plug-in card industrial assembly technology. Its elec...

Claims

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Application Information

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IPC IPC(8): G01C21/20
Inventor 高伟王国臣夏秀玮吴磊于强李海军张润峰
Owner HARBIN ENG UNIV
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