Quality trimming method for hemispherical harmonic oscillator

Abstract

The invention discloses a mass trimming method for a hemispherical harmonic oscillator, which comprises the following steps of: confirming a main shaft and a frequency difference delta f of the hemispherical harmonic oscillator which needs to be subjected to mass trimming through a sweep frequency test, and confirming a required theoretical removal mass delta m total through simulation calculation; weighing the mass m0 of the harmonic oscillator; clamping the outer support rod of the harmonic oscillator on a rotatable operation table; roughly repairing the quality of the harmonic oscillator; carrying out fine trimming on the quality of the harmonic oscillator; the masses of the first direction, the second direction, the third direction and the fourth direction corresponding to the low-frequency axis of the harmonic oscillator are trimmed, so that the actual trimming removal amounts of all the directions are all the actual trimming removal amounts, and the harmonic oscillator is taken down, cleaned and then dried; and measuring the frequency difference of the harmonic oscillator until the frequency difference reaches a set target value. The method is friendly to human and environment, does not need to be matched with expensive equipment, reduces the production cost, is simple and flexible to operate, short in trimming period and high in efficiency, does not affect the quality factor of the harmonic oscillator, gives consideration to the trimming precision, and can effectively reduce the frequency difference of the harmonic oscillator.

Description

technical field

[0001] The invention relates to the technical field of vibrating gyroscopes, in particular to a method for adjusting the quality of a hemispherical harmonic oscillator. Background technique

[0002] As everyone knows, the hemispherical resonant gyroscope is a new type of solid vibration gyroscope based on the Coriolis vibration principle. It has many advantages such as a small number of parts, high precision, and long life. It is a research hotspot in the field of inertial devices at home and abroad. The hemispherical resonator is one of the core devices of the hemispherical resonator gyroscope, which is generally processed by fused silica with high quality factor. Theoretically, the higher the isotropy and symmetry of the hemispherical harmonic oscillator, the better the key indicators such as gyro stability and repeatability. However, affected by factors such as material inhomogeneity and processing technology, there is inevitably a deviation between the a...

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