期刊论文

Calibration and simulation of fully digital closed-loop quartz flexible accelerometer system

中文

电子测试

1000-8519

2020

6

20-23

10.16520/j.cnki.1000-8519.2020.06.005

本校为第一机构

针对石英挠性加速度计模拟伺服方案存在精度损失问题。采用全数字闭环的检测方法,提出一种以传递函数校正的控制方案,通过引入积分环节和补偿校正装置消除系统的一阶静态误差,以获得足够的相位裕度。同时对校正装置进行离散化处理,建立了离散域数字闭环系统模型。基于此模型进行仿真与研究,校正后系统超调量在19%,-3dB带宽在1417Hz左右。离散域与连续域阶跃曲线特性基本相同,仿真结果与理论基本一致。验证了数字闭环系统校正方法的正确性和可行性。

There is a problem of accuracy loss for the analog servo solution of quartz flexible accelerometer.A fully digital closed-loop detection method is adopted,and a control scheme corrected by the transfer function is proposed.The first-order static error of the system is eliminated through the integration link and the compensation correction device,and a sufficient phase margin is obtained.At the same time,the correction device is discretized,and a digital closed-loop system model in the discrete domain is established.Based on this model for simulation and research,the overshoot of the system aft...