[1]刘润,蔡体菁,丁昊.高精度石英挠性加速度计闭环系统的设计与分析[J].东南大学学报(自然科学版),2010,40(2):311-315.[doi:10.3969/j.issn.1001-0505.2010.02.018]
 Liu Run,Cai Tijing,Ding Hao.Design and analysis of closed-loop system of high resolution flexure pendulum accelerometer[J].Journal of Southeast University (Natural Science Edition),2010,40(2):311-315.[doi:10.3969/j.issn.1001-0505.2010.02.018]
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高精度石英挠性加速度计闭环系统的设计与分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第2期
页码:
311-315
栏目:
其他
出版日期:
2010-03-20

文章信息/Info

Title:
Design and analysis of closed-loop system of high resolution flexure pendulum accelerometer
作者:
刘润123 蔡体菁12 丁昊12
1 东南大学微惯性仪表与先进导航技术教育部重点实验室,南京 210096; 2 东南大学仪器科学与工程学院,南京 210096; 3 南京航空航天大学工程训练中心,南京 210016
Author(s):
Liu Run123 Cai Tijing12 Ding Hao12
1 Laboratory of Micro Inertial Instrument and Advanced Navigation Technology of Ministry of Education, Southeast University,Nanjing 210096, China
2 School of Instrument Science and Engineering, Southeast University, Nanjing 21009
关键词:
石英挠性加速度计 分辨率 重力梯度
Keywords:
quartz-flexure accelerometer resolution gravity gradiometer
分类号:
V411;U666.1
DOI:
10.3969/j.issn.1001-0505.2010.02.018
摘要:
探讨了石英挠性加速度计的分辨率影响因素,提出了一种对现有石英挠性加速度计的改进设计.根据重力梯度测量对加速度计分辨率的要求,推导出摆片的固有频率,然后使用有限元方法重新设计加速度计的摆片结构.另外,为了降低加速度计的机械热噪声,对表头抽真空,通过加入比例-微分环节对加速度计的控制回路进行阻尼补偿.计算出系统的开环传递函数,并对其进行动态性能仿真分析.分析结果表明:加速度计系统通过在系统前向通道添加比例微分环节能够补偿系统的阻尼,消除加速度计在固有频率处的振荡,使加速度计闭环后处于临界阻尼状态并保持系统的稳定性.改进后加速度计的系统带宽为515Hz,响应时间为3.7ms,分辨率达到10-10g,能够满足高精度测量的需要.
Abstract:
The influential factors on the resolution of quartz-flexure accelerometer are analyzed. Modification design of the accelerometer is brought forward. The resonant frequency of pendulum is obtained according to the demand of accelerometer resolution in gravity gradient measurement. Then the structure of pendulum is redesigned by the finite element method. The mechanical Brownian noise is reduced greatly by evacuating the accelerometer. The damping of the accelerometer is increased by adding a damping compensator in the control loop. The open-loop transfer function is deduced and the dynamic performance is simulated. The analysis results show that differential factor can be put in series to compensate air damping which makes the accelerometer in a critical-damping state. Oscillation at resonant frequency of pendulum can be eliminated and the control system can keep stabilization. All these make the accelerometer optimized, the bandwidth and response time being 515Hz and 3.7ms, respectively. The resolution can reach 10-10g, which can meet the requirements of high resolution measurement.

参考文献/References:

[1] Jekeli Christopher.Airborne gradiometry error analysis[J].Surveys in Geophysics,2006,27(2):257-275.[2] Dransfield M H,Lee B J.The FALCON airborne gravity gradiometer survey systems[C] //Proc Australia Soc of Exploration Geophys-PESA Airborne Gravity Workshop. Sydney,Australia,2004,18:15-20.
[3] Lee J B.FALCON gravity gradiometer technology [EB/OL].(2001)[2009-03-18].http://www.publish.csiro.au/paper/EG01247.htm.
[4] John B,James B.Accelerometer and rate sensor package for gravity gradiometer instrument:WO/2006/073946A1[P].2006-07-13.
[5] 杨功流,刘洋希,李晓平.重力梯度仪加速度计控制回路分析和设计[J].中国惯性技术学报,2009,17(2):145-147.
  Yang Gongliu,Liu Yangxi,Li Xiaoping.Analysis and design on control loops of gravity gradiometer accelerometer[J].Journal of Chinese Inertial Technology, 2009,17(2):145-147.(in Chinese)
[6] Metzger E H.Development experience of gravity gradiometer system[C] //IEEE PLANS 82.Atlantic City,NJ,USA,1982:323-332.
[7] Aaltonen L,Rahikkala P,Saukoski M,et al.High resolution analog interface for micromachined capacitive accelerometer[C] //18th European Conference on Circuit Theory and Design. Seville,Spain,2007:96-99.
[8] Levinzon F A.Noise of piezoelectric accelerometer with integral FET amplifier[J].IEEE Sensors Journal, 2005,5(6):1235-1242.
[9] Mohd-Yasin F,Nagel D J,Korman C E,et al.Low frequency noise measurement of three-axis surface micro-machined silicon capacitive accelerometer[C] //International Semiconductor Device Research Symposium. College Park,MD,USA,2007:1-2.
[10] Liu Minjie,Zhang Gang,Dong Jingxin,et al.Interface circuit for capacitive microaccelerometer[C] //51st Midwest Symposium on Circuits and Systems. Knoxville,TN,USA,2008:654-657.
[11] Lotters J C,Olthuis W,Veltink P H,et al.A sensitive differential capacitance to voltage converter for sensor applications[J].Instrumentation and Measurement,1999,48(1):89-96.
[12] Kollar M,Michaeli L.Noise consideration for micromachined digital accelerometers[C] //Instrumentation and Measurement Technology Conference. Sorrento,Italy,2006:507-512.
[13] Stuart W D,Tapson J.Simple force balance accelerometer/seismometer based on a tuning fork displacement sensor[J].Review of Scientific Instruments, 2004,75(9):3045-3049.

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备注/Memo

备注/Memo:
作者简介: 刘润(1973—),男,博士生; 蔡体菁(联系人),男,博士,教授,博士生导师,caitij@seu.edu.cn.
基金项目: 国家高技术研究发展计划(863计划)资助项目(2006AA12Z302).
引文格式: 刘润,蔡体菁,丁昊.高精度石英挠性加速度计闭环系统的设计与分析[J].东南大学学报:自然科学版,2010,40(2):311-315. [doi:10.3969/j.issn.1001-0505.2010.02.018]
更新日期/Last Update: 2010-03-20