Purpose

A high-precision gyroscope is an important tool for accurate positioning, and the amplitude stability and frequency tracking ability of the drive control system are important and necessary conditions to ensure the precision of micro-electro-mechanical systems (MEMS) gyroscopes. To improve the precision of MEMS gyroscopes, this paper proposes a method to improve the amplitude stability and frequency tracking ability of a drive control system.

Design/methodology/approach

A frequency tracking loop and an amplitude control loop are proposed to improve the frequency tracking ability and amplitude stability of the drive control system for a MEMS gyroscopes. The frequency tracking loop mainly includes a phase detector, a frequency detector and a loop filter. And, the amplitude control loop mainly includes an amplitude detector, a low-pass filter and an amplitude control module. The simulation studies on the frequency tracking loop, amplitude control loop and drive control system composed of these two loops are implemented. The corresponding digital drive control algorithm is realized by the Verilog hardware description language, which is downloaded to the application-specific integrated circuits (ASIC) platform to verify the performances of the proposed method.

Findings

The simulation experiments in Matlab/Simulink and tests on the ASIC platform verify that the designed drive control system can keep the amplitude stable and track the driving frequency in real time with high precision.

Originality/value

This study shows a way to design and realize a drive control system for MEMS gyroscopes to improve their tracking ability. It is helpful for improving the precision of MEMS gyroscopes.

中文翻译：

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一种提高MEMS陀螺仪驱动控制跟踪能力的方法

目的

高精度陀螺仪是精确定位的重要工具，驱动控制系统的振幅稳定性和频率跟踪能力是确保微机电系统（MEMS）陀螺仪精度的重要且必要的条件。为了提高MEMS陀螺仪的精度，本文提出了一种提高驱动控制系统的幅度稳定性和频率跟踪能力的方法。

设计/方法/方法

提出了一种频率跟踪环路和幅度控制环路，以提高MEMS陀螺仪驱动控制系统的频率跟踪能力和幅度稳定性。频率跟踪环路主要包括鉴相器，频率检测器和环路滤波器。并且，振幅控制回路主要包括振幅检测器，低通滤波器和振幅控制模块。对频率跟踪回路，振幅控制回路和由这两个回路组成的驱动控制系统进行了仿真研究。相应的数字驱动控制算法是通过Verilog硬件描述语言实现的，该语言被下载到专用集成电路（ASIC）平台以验证所提出方法的性能。

发现

在Matlab / Simulink中进行的仿真实验以及在ASIC平台上的测试证明，所设计的驱动控制系统可以保持振幅稳定，并可以高精度实时跟踪驱动频率。

创意/价值

这项研究展示了一种设计和实现MEMS陀螺仪驱动控制系统的方法，以提高其跟踪能力。这有助于提高MEMS陀螺仪的精度。