Study on the Mechanism of Energy Dissipation in Hemispherical Resonator Gyroscope

Area of Science:

• Mechanical Engineering
• Aerospace Engineering
• Physics

Background:

• Hemispherical resonator gyroscopes (HRGs) are vital for spacecraft inertial navigation.
• Understanding energy dissipation is key to improving HRG accuracy and longevity.
• Quality defects in the resonator shell can significantly impact gyroscope performance.

Purpose of the Study:

• To establish a mechanical analysis model for HRG energy dissipation.
• To investigate the impact of resonator shell quality defects on gyroscope performance.
• To experimentally verify the theoretical model of energy transfer and dissipation.

Main Methods:

• Developed a mechanical analysis model of the HRG head and resonator shell.
• Analyzed unbalanced forces and energy transfer paths due to quality defects.
• Conducted circumferential quality factor tests on assembled and unassembled HRGs.

Main Results:

• Identified specific energy dissipation mechanisms within the HRG.
• Quantified the influence of resonator shell defects on the gyroscope's quality factor.
• Demonstrated consistency between the theoretical model and experimental observations.

Conclusions:

• The established model accurately describes energy dissipation in HRGs with quality defects.
• Experimental results validate the theoretical analysis of defect-induced energy loss.
• Findings provide insights for enhancing HRG design and manufacturing to minimize performance degradation.