High-precision laser gyroscope inertia measurement system for POS

Abstract

The invention discloses a high-precision laser gyroscope inertia measurement system for a POS, which comprises three laser gyroscopes, three quartz accelerometers, an IMU structure, a supporting frame, absorbers, an I / F signal conditioning circuit, an acquiring and resolving computer, a secondary power supply, a shell, a front panel, a bottom panel and a connecting plug. Both three laser gyroscopes and the three quartz accelerometers are assembled on the IMU structure orthographically, and the IMU structure are assembled in the inner cavity of the supporting frame through eight absorbers on two sides. The secondary power supply is mounted on the upper frame of the supporting frame by bolts, and the I / F signal conditioning circuit and the acquiring and resolving computer are mounted in grooves in the left and right side walls of the supporting frame by bolts. The shell is mounted on the outside of the supporting frame by bolts, the front panel and the bottom panel are mounted on the front surface and the lower surface of the supporting frame by bolts respectively; and the connecting plug is mounted on the front panel by bolts. In the invention, the integration and vibration resistance of the system are improved and the system is applicable to high-precision inertia measurement systems.

Description

technical field [0001] The invention belongs to the technical field of inertia and relates to a high-precision POS laser gyro inertial measurement system, which can be applied to POS (Position and Orientation System, position and attitude measurement system), and can also be applied to inertial navigation, inertial / GPS (Global Position System , Global Positioning System) integrated navigation system. Background technique [0002] For high-resolution aerial remote sensing systems, in addition to high-resolution remote sensing payloads, the main factor restricting the imaging resolution of remote sensing systems is high-precision POS. High-precision POS provides high-precision position and attitude references for remote sensing loads, and provides precise orientation for inertial stabilization platforms. Whether for high-resolution optical payload optical cameras or airborne three-dimensional imaging lidars, high-precision POS is the key to improving imaging resolution, and h...

AI Technical Summary

Problems solved by technology

Due to the poor bias stability and repeatability of the small dynamic tuning gyroscopes used, the precision of the small dynamic tuning gyro inertial measurement systems developed by the above two companies is low, and there is no potential for greatly improving the accuracy, and this series of inertial measurement systems No vibration damping device is designed, and they do not have the ability to resist the harsh external vibration environment

[0004] NORTHROP GRUMMAN of the United States and IGI of Germany have developed high-precision fiber optic gyroscope inertial measurement systems for POS, and their system products have been successfully applied to LMK2000, RMK-TOP and other aerial camera systems, but these two types of products do not have vibration reduction devices. , does not have the ability to resist the harsh external vibration environment

In addition, foreign countries have imposed an embargo on high-precision POS laser gyro inertial measurement systems and related technology blockades to China, so there is no relevant technical information

[0005] Domestically, the POS inertial measurement system technology started relatively late, but some progress has been made. The POS flexible gyro inertial measurement system and the fiber optic gyro inertial measurement system have been developed, but there is no high-precision POS laser gyroscope in China at present. Research reports on inertial measurement systems, only the laser gyro inertial measurement system used in navigation, guidance and control systems, but the relevant literature is all about the theoretical method of the laser gyro inertial measurement system, and there is no information on structural design

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