High-precision uniaxial rotation attitude measuring system based on laser gyro

A laser gyroscope and measurement system technology, applied in the field of inertial navigation, can solve problems such as the inability to eliminate attitude jumps, system attitude errors, and difficulty in making high-precision attitude measurement systems, so as to achieve high reliability, eliminate attitude errors, and improve accuracy. The effect of quasi-precision

Inactive Publication Date: 2010-05-05
龙兴武 +5
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Problems solved by technology

The error of the inertial device will cause the system attitude error to increase with time, and the deformation of the shock absorber will cause the attitude jump of the system under violent movement. This attitude jump cannot be eliminated through the compensation of the software algorithm.
Therefore, for the existing laser gyro strapdown inertial navigation system, it is difficult to make a high-precision attitude measurement system that can be used for a long time by using a conventional strapdown scheme.

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  • High-precision uniaxial rotation attitude measuring system based on laser gyro
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  • High-precision uniaxial rotation attitude measuring system based on laser gyro

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] Such as figure 1 , 2 , 3, three laser gyroscopes and three accelerometers are installed orthogonally on the bracket of the inertial measurement unit (IMU), and the bracket is mounted on the single-axis precision mechanical turntable through standard fastening screws, and the single-axis precision mechanical turntable rotates around the axis To periodic reciprocating rotation. The laser gyroscope and accelerometer in the IMU are sensitive to the angular rate and acceleration of the inertial space, and after error compensation, they are output to the navigation computer to calculate the attitude information of the IMU. The attitude information of the carrier is accurately determined by using the horizontal attitude of the IMU relative to the carrier calibrated in advance and the angular position output by the turntable.

[0016] In order to obtain a h...

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Abstract

The invention discloses a high-precision uniaxial rotation attitude measuring system based on a laser gyro, consisting of two parts including an inertia measurement unit A and a uniaxial precise machine turntable B. In the inertia measurement unit A, a laser gyro and a quartz accelerometer are fully and rigidly coupled with a bracket, the inertia measurement device A is fixed on the uniaxial precise machine turntable B by a standard fastening bolt, the relative attitude between the inertia measurement device A and the uniaxial precise machine turntable B is precisely calibrated, and the precision and the synchronism of a solving attitude of the inertia measurement device A are guaranteed. The constant drift of an inertia device in the inertia measurement unit is modulated by the periodic rotation of the uniaxial precise machine turntable, thus the alignment precision and the navigation attitude precision of the attitude measuring system are improved. The invention can provide a carrier (a ship) with real-time and complete high-precision attitude information for a long time and improve the comprehensive combat capability of the carrier.

Description

technical field [0001] The invention is a high-precision single-axis rotation attitude measurement system applied to long-time inertial navigation, which belongs to the field of inertial navigation. Background technique [0002] Laser strapdown inertial navigation technology is an important development direction of inertial navigation technology in recent years. Inertial technology is an engineering technology that uses the principle of inertial navigation or other related principles to independently measure and control the angular motion and linear motion parameters of objects. It is the general term for inertial navigation guidance, inertial measurement and inertial sensor technology. The laser strapdown inertial navigation system fixes the inertial device directly on the carrier, and the laser gyroscope and accelerometer respectively measure three rotational angular velocities and three linear velocities along the carrier coordinate system, and calculate the speed, positi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16
Inventor 龙兴武汤建勋王宇张鹏飞于旭东魏国
Owner 龙兴武
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