Three-Dimensional Performance Evaluation of Hemispherical Coriolis Vibratory Gyroscopes.

Area of Science:

• Mechanical Engineering
• Sensor Technology
• Physics

Background:

• Coriolis vibratory gyroscopes (CVGs) are advanced position detection devices.
• CVGs utilize a vibrating structure and the Coriolis effect, replacing traditional spinning rotors.
• Key features include vibrating proof mass and elastic suspension designs.

Purpose of the Study:

• To review oscillation patterns and characteristics of gyroscopic reaction to Coriolis force in CVGs.
• To examine dynamic relations and performance improvement strategies through parameter changes.
• To present a general equation for parameter impact on operating mode frequencies.

Main Methods:

• Review of operational principles of Coriolis vibratory gyroscopes.
• Analysis of dynamic relations and phase relations.
• Examination of capacitive versus piezoelectric excitation technologies.
• Application of two-dimensional finite element analysis for optimal performance evaluation.

Main Results:

• Oscillation patterns and gyroscopic reaction characteristics are detailed.
• The impact of parameter changes on performance is analyzed.
• A general equation is presented to explain parameter effects on operating mode frequencies.
• Differences between capacitive and piezoelectric excitation technologies are highlighted.

Conclusions:

• CVGs offer significant advantages over traditional gyroscopes for position detection.
• Understanding parameter impacts is crucial for optimizing CVG performance.
• Advanced analysis, including finite element methods, is necessary for modern CVG design.