Gas Damping Coefficient Research for MEMS Comb Linear Vibration Gyroscope

TL;DR

This paper investigates how air pressure affects the gas damping coefficient and quality factor of MEMS comb linear vibration gyroscopes, impacting their dynamic bandwidth and output characteristics.

Contribution

It analyzes the relationship between air pressure and the gyroscope's output, frequency distribution, and quality factor, providing insights into pressure effects on MEMS gyroscope performance.

Findings

Air pressure significantly influences the gas damping coefficient.

Changes in air pressure affect the quality factor and bandwidth.

The study clarifies the relationship between pressure and output phase/amplitude.

Abstract

Silicon-MEMS gyroscope is an important part of MEMS (Micro Electrical Mechanical System). There are some disturb ignored in traditional gyroscope that must be evaluated newly because of its smaller size (reach the level of micron). In these disturb, the air pressure largely influences the performance of MEMS gyroscope. Different air pressure causes different gas damping coefficient for the MEMS comb linear vibration gyroscope and different gas damping coefficient influences the quality factor of the gyroscope directive. The quality factor influences the dynamic working bandwidth of the MEMS comb linear vibration gyroscope, so it is influences the output characteristic of the MEMS comb linear vibration gyroscope. The paper shows the relationship between the air pressure and the output amplified and phase of the detecting axis through analyzing the air pressure influence on the MEMS comb linear vibration gyroscope. It discusses the influence on the frequency distribute and quality factor of the MEMS comb linear vibration gyroscope for different air pressure.