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Laser gyroscope strapdown inertia navigation system output conversion device based on reusable IP core

A laser gyroscope and strapdown inertial navigation technology, which is used in measurement devices, navigation through velocity/acceleration measurement, instruments, etc., can solve the problem of inability to eliminate random quantities of jitter amplitudes, simplify complexity, and filter out high-frequency noise. , the effect of improving the flexibility of configuration

Inactive Publication Date: 2010-06-02
HARBIN ENG UNIV
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Problems solved by technology

[0006] For the two-frequency machine-jittered laser gyroscope, due to the existence of mechanical jitter, the high-frequency vibration caused by the jitter in the original data output by the laser gyroscope must be compensated. The usual method is full-cycle counting or digital filtering. In order to eliminate dynamic locking errors, The method of injecting random jitter amplitude is generally used in machine shake gyroscopes. After adding random jitter amplitude, the whole cycle sampling cannot eliminate the random amount of jitter amplitude.

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  • Laser gyroscope strapdown inertia navigation system output conversion device based on reusable IP core
  • Laser gyroscope strapdown inertia navigation system output conversion device based on reusable IP core
  • Laser gyroscope strapdown inertia navigation system output conversion device based on reusable IP core

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Embodiment Construction

[0027] The present invention is the output conversion device of the laser gyro strapdown inertial navigation system based on reusable IP core, carries out the collection of laser gyro output signal by this method, and the whole output conversion device is completed by a slice of FPGA, utilizes in the present invention The IP core that can be reused to realize the filter is the key of the entire output conversion device. The hardware circuit is designed, and finally the specific experimental simulation is carried out, and the experimental data are analyzed. The output conversion device of the entire laser gyro includes two parts: reversible counting and digital filtering. The two beams of signals output by the laser gyro are reversibly counted by the reversible counting unit, sent to the register for storage, and then sampled at 1KHz and sent to the constructed FIR digital filter. After the IP core is successfully filtered, down-sampling is performed to make its sampling frequen...

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Abstract

The invention relates to a laser gyroscope strapdown inertia navigation system output conversion device based on a reusable IP core. Navigation information output by a laser gyroscope is input into a field programmable gate array (FGPA), information output by the FGPA is input into a navigation resolving module for resolution, wherein the FGPA consists of an output conversion module and an FIR IP core filtering module and is configured by a configuration circuit, and a power supply circuit supplies power for the FGPA. The device greatly simplifies the complexity and improves the flexibility of the configuration.

Description

(1) Technical field [0001] The invention relates to an output conversion device of a laser gyro strapdown inertial navigation system based on a reusable IP core. (2) Background technology [0002] With the continuous development of high technology, especially the rapid development of photoelectric inertial technology and digital computer technology, the performance of gyroscope and accelerometer has been continuously improved, and the strapdown inertial navigation system has also been widely used and researched. Among them, due to the many excellent characteristics of the laser gyro, the laser gyro strapdown inertial navigation system has the characteristics of being suitable for high dynamic environments, low cost, good reliability, and high performance-price ratio. It is widely used in military and civilian applications. mainstream direction. [0003] The strapdown inertial navigation system can generally be divided into inertial instrument components, instrument electron...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/18G01C25/00
Inventor 高伟孙佳柴永利徐博于强陈世同周广涛高洪涛吴磊王慧
Owner HARBIN ENG UNIV
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