Research on Dynamic Balance Adjustment Method of Single Braced Frame Gyroscope Rotor

Xukui Hou,Ende Wang,Hui Cao,Kai Qi,Yalong Zhu,P Tandon,W Wisnoe,R Furutani

doi:10.1051/matecconf/201925602005

Xukui Hou, Ende Wang + Show 6 more

Open Access

https://doi.org/10.1051/matecconf/201925602005

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Abstract

The uneven mass distribution of gyro rotors results in vibration, rotation and drift of gyro rotors, which seriously affect the performance index and life of gyro rotors. However, because there is no rigid connection between the rotary shaft and the shell of the gyro rotor, the dynamic balancing machine can only balance the vibration component of the single braced frame gyroscope rotor, and can’t measure the gyro rotor’s rotation component. By analyzing the influence of uneven rotor mass distribution on the gyro rotor performance, a method of eliminating two rotational degrees of freedom of the gimbal in gyro rotor by mandrel is proposed, which makes the dynamic balancing machine directly measure the vibration component and the moving component of the gyroscope rotor, and simplifies the dynamic balancing debugging process.

Highlights

Due to the uneven distribution of material quality, machining dimension error, assembling gap and other reasons, it is impossible to ensure that the center of gravity of the gyroscope rotor coincides completely with the rotation center
Because of the deviation between the center of gravity of the rotor and the center of rotation, gyroscope rotor in the work will produce unbalanced force and unbalanced moment according to D'Alembert Principle[1]
The balance method of the coordinator gyro rotor is mainly to adjust the unbalance force of the rotor through the dynamic balancing machine[2], and to adjust the unbalance moment of the rotor depending on the optical system and the detector imaging results

Summary

Introduction

Due to the uneven distribution of material quality, machining dimension error, assembling gap and other reasons, it is impossible to ensure that the center of gravity of the gyroscope rotor coincides completely with the rotation center. Because of the deviation between the center of gravity of the rotor and the center of rotation, gyroscope rotor in the work will produce unbalanced force and unbalanced moment according to D'Alembert Principle[1]. The unbalanced moment will produce a forced nutation on the gyro rotor and affect the imaging quality of the optical system. The balance method of the coordinator gyro rotor is mainly to adjust the unbalance force of the rotor through the dynamic balancing machine[2], and to adjust the unbalance moment of the rotor depending on the optical system and the detector imaging results. By analyzing the unbalance force and unbalance moment of the rotor, a method of improving the balancing device is proposed to simplify the balancing process of the gyro rotor

Decomposition and synthesis of force

The effect of unbalanced moment M on gyro rotor

Adjustment method and result of gyro rotor dynamic balance

Adjustment of gyro drift amount

Conclusion