Gyro rotor mass center position accurate adjustment device and method based on ultrasonic antifriction effect

Abstract

The invention discloses a gyro rotor mass center position accurate adjustment device and method based on an ultrasonic antifriction effect, and belongs to the field of small displacement adjustment of precision machinery. An ultrasonic transducer is added between an adjusting screw and a gyro clamp; in the adjusting process, the ultrasonic transducer transmits ultrasonic vibration to the adjusting screw; and at the moment, the adjusting screw has already been screwed into a rotor adjusting screw hole, so that the ultrasonic vibration can be transmitted to a gyro rotor through transmission of the adjusting screw to realize ultrasonic vibration between rotor contact surfaces. Transverse vibration between the contact surfaces can reach the ultrasonic antifriction effect, and besides, through axial rotation of the adjusting screw, accurate adjustment of gyro rotor mass center position can be realized under the condition of smaller friction force. The device and method can effectively reduce the friction force between the rotor and bearing contact surfaces, thereby reducing creeping phenomenon and improving adjusting precision and efficiency; and the device and method can be widely applied to the small displacement accurate adjustment process.

Description

technical field [0001] The invention belongs to the field of micro-displacement adjustment of precision machinery, and relates to a device and method for precisely adjusting the centroid position of a gyro rotor based on the ultrasonic anti-friction effect. Background technique [0002] Gyroscopes play a key role in the detection of aircraft flight attitude and inertial guidance. The good performance of gyroscopes is crucial to the judgment of aircraft attitude. In order to ensure the measurement accuracy of the gyroscope, it is necessary to control the misalignment between the center of mass of the rotor and the axis of rotation within a certain range. Otherwise, when the rotor rotates at a high speed, the vibration of the gyroscope will be severe, and the measurement data error of the gyroscope will be large and the service life will be greatly increased. shorten. [0003] Most of the current gyro rotor dynamic balancing methods use manual adjustment. During the adjustmen...

AI Technical Summary

Problems solved by technology

The offset distance of the center of mass of the gyro rotor relative to the center of rotation generally ranges from a few microns to more than ten microns. The original solution uses a stepping motor to drive the adjustment screw into the threaded hole for adjusting the rotor, and adjust the center of mass of the rotor by pulling. The scheme realizes the automation of rotor adjustment to a certain extent, but the crawling phenomenon still exists

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