Controllable vibration damping device for mechanically dithered laser gyroscope inertial navigation system and method

Abstract

The invention relates to a controllable vibration damping device for a mechanically dithered laser gyroscope inertial navigation system and a vibration damping method, and belongs to the field of inertial navigation. The controllable vibration damping device comprises an inertial sensor mounting frame, an S-shaped folding beam vibration damping device, a folding beam vibration damping device mounting seat and a mounting base. The controllable vibration damping device has the following technical effects that an inertial sensor assembly can be decoupled in the radial translation and swing directions, the complex vibration response of the inertial sensor assembly in a resonance area is reduced, and the vibration isolation performance of the inertial sensor assembly is improved; deformation of a damper is measured, controlled and eliminated in real time, and errors caused by the damper between the inertial sensor assembly and a carrier are further reduced; and deformation of the S-shaped folding beam vibration damping device is input into the mechanically dithered laser gyroscope inertial navigation system in real time and is integrated with an angular velocity and an acceleration signal, measured by an inertial device, of the inertial sensor assembly, so that high-precision real-time attitude and position output of the carrier is obtained.

Description

technical field [0001] The invention relates to a controllable vibration reduction device and a vibration reduction method for a machine-shaking laser gyro inertial navigation system, belonging to the field of inertial navigation. Background technique [0002] Due to the characteristics of high precision, small size, high reliability, and low temperature sensitivity, laser gyroscopes are increasingly becoming the preferred angular rate sensors in inertial navigation systems. In order to eliminate the inherent "lock-up error" of the laser gyroscope, the machine-dithered laser gyroscope uses mechanical dithering components to keep the angular rate sensitive to the laser gyroscope away from the locked-up area through periodic shaking. However, it is unavoidable that the shaking of the mechanical shaking parts of the machine-shaking laser gyro will have an adverse effect on other sensitive components in the inertial navigation system; Inertial sensors (such as accelerometers) i...

AI Technical Summary

Problems solved by technology

The eight-point suspension installation method used in Document 3 uses a passive vibration damping device. The vibration damper is a rubber damper, and its consistency is difficult to ensure, and the vibration damping of the damper is a nonlinear low-pass filter. poor adaptability to complex application environments with a large dynamic range, and it is difficult to meet the requirements of the inertial navigation system for real-time motion attitude measurement

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