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High-precision laser gyroscope single-shaft rotating inertial navigation system

A technology of inertial navigation system and laser gyro, which is applied in the field of high-precision laser gyro single-axis rotation system, can solve the problems that it is difficult to make a high-precision inertial navigation system, and achieve the effects of improving accuracy, reducing impact, and simple structure

Inactive Publication Date: 2010-05-05
龙兴武 +4
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Problems solved by technology

However, due to the limitation of the performance of the existing laser gyro, it is difficult to make a high-precision inertial navigation system that can be used for a long time with the conventional strap-down scheme.

Method used

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  • High-precision laser gyroscope single-shaft rotating inertial navigation system
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  • High-precision laser gyroscope single-shaft rotating inertial navigation system

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Embodiment Construction

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

[0015] Such as figure 1 with figure 2 As shown, the inertial measurement unit (IMU) is installed on a single-axis turntable. The IMU consists of three orthogonally installed laser gyroscopes and three orthogonally installed accelerometers. The single-axis turntable can periodically reciprocate around the axis. The laser gyroscope and accelerometer in the IMU are sensitive to the angular rate and acceleration of the inertial space, and output to the navigation computer to calculate the posture, velocity and position information of the IMU after error compensation. Using the pre-calibrated horizontal attitude of the IMU relative to the carrier and the angular position output by the turntable, the attitude information of the carrier is determined.

[0016] In order to obtain a long-term, high-precision laser gyro single-axis rotating inertial navigation system, the following tas...

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Abstract

The invention relate to a high-precision laser gyroscope single-shaft rotating inertial navigation system which comprises an inertial measuring unit, a single-shaft rotating platform, a circuit box, a UPS power supply, a display control device, and the like, wherein the inertial measuring unit 1 is installed on the single-shaft rotating platform 2 and carries out shock absorption by a shock absorber 3. The periodic rotation of the single-shaft rotating platform is used for modulating literal drift of an inertial device in the inertial measuring unit and improving the posture, speed and position precision of the inertial navigation system. The system concretely comprises precise installation and calibration of the inertial measuring unit, the selection of a single-shaft rotating way, precise multiposition initial alignment, the error analysis, modeling and temperature compensation of the inertial navigation system and the inertial device and a navigation algorithm of a single-shaft rotating strapdown inertial navigation system. The invention can provide a real-time, complete and high-precision navigation posture and speed and position information for a carrier (warship) for a long time and improve the comprehensive combat capability of the carrier.

Description

Technical field [0001] The invention is a high-precision laser gyro single-axis rotation system applied to long-term inertial navigation, and belongs to the field of inertial navigation. Background technique [0002] The laser strap-down inertial navigation system directly fixes the inertial device on the carrier. The laser gyroscope and accelerometer respectively measure the three rotational angular velocities and three linear velocities along the carrier coordinate system. The velocity, position, and position of the carrier are calculated. Various navigation information such as heading and horizontal attitude. The system does not need to rely on any external information to obtain the navigation parameters. It is a completely autonomous navigation system. It has the characteristics of small size, light weight, low cost, high reliability, and good concealment. It has become a transportation in the aviation, aerospace and navigation fields. The main navigation method of the carri...

Claims

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Application Information

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IPC IPC(8): G01C21/18G01C21/20
Inventor 龙兴武汤建勋王宇张鹏飞于旭东
Owner 龙兴武
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