Design and implementation of digital closed-loop drive control system of a MEMS gyroscope

被引：1

作者：

Wang, Xiaolei ^{[1
,2
]}

Li, Hongsheng ^{[1
,2
]}

Yang, Bo ^{[1
,2
]}

机构：

[1] School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China

[2] Key Lab. of Micro-Inertial Instrument and Advanced Navigation Technology of Ministry of Education, Southeast University, Nanjing 210096, China

来源：

Journal of Southeast University (English Edition) | 2012年 / 28卷 / 01期

关键词：

Field programmable gate arrays (FPGA) - Gyroscopes - MEMS - Natural frequencies - Closed loop control systems - Locks (fasteners);

D O I：

10.3969/j.issn.1003-7985.2012.01.007

中图分类号：

学科分类号：

摘要：

In order to effectively control the working state of the gyroscope in drive mode, the drive characteristics of the micro electromechanical system (MEMS) gyroscope are analyzed in principle. A novel drive circuit for the MEMS gyroscope in digital closed-loop control is proposed, which utilizes a digital phase-locked loop (PLL) in frequency control and an automatic gain control (AGC) method in amplitude control. A digital processing circuit with a field programmable gate array (FPGA) is designed and the experiments are carried out. The results indicate that when the temperature changes, the drive frequency can automatically track the resonant frequency of gyroscope in drive mode and that of the oscillating amplitude holds at a set value. And at room temperature, the relative deviation of the drive frequency is 0.624×10-6 and the oscillating amplitude is 8.0×10-6, which are 0.094% and 18.39% of the analog control program, respectively. Therefore, the control solution of the digital PLL in frequency and the AGC in amplitude is feasible. © Copyright.

引用

页码：35 / 40