﻿ 石英挠性加速度计表头行为模型研究 Study of Behavior Model of Quartz Flexible Accelerometer Header

Journal of Electrical Engineering
Vol.04 No.01(2016), Article ID:17280,9 pages
10.12677/JEE.2016.41011

Study of Behavior Model of Quartz Flexible Accelerometer Header

Meixue Shang, Huiyong He, Lijun Tang, Peng Zhao, Yu Gang, Pengyi Zhou, Yongjian Wang

School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha Hunan

Received: Mar. 9th, 2016; accepted: Mar. 23rd, 2016; published: Mar. 31st, 2016

ABSTRACT

For cumbersome tuning of quartz flexible accelerometer PID parameters, complex building of readout circuit’s new program verification platform and other issues, analysis of the quartz flexible accelerometer meter works and mathematical model was carried out, and accelerometers header behavioral model was designed. We set up the appropriate verification platform, compared the open loop step response of the resulting header behavior model with the actual header, and verified the correctness of the behavior of the model. A joint simulation was done combining the behavioral model with the read-out circuit header, to realize the closed loop of header model and readout circuit, and the influence of different PID parameters on the closed-loop dynamic response characteristics such as system accommodation time, and −3dB bandwidth of particular PID parameters of the system were analyzed. The header behavior model can be used to study the meter readout circuit design, setting PID parameter of the readout circuit and analyze the performance index of the readout circuit and other aspects.

Keywords:Quartz Flex Accelerometer, Model Design, Readout Circuit

1. 引言

2. 石英挠性加速度计表头原理

(2-1)

(2-2)

Figure 1. Structure of quartz flexible accelerometer header

(2-3)

(2-4)

(2-5)

(2-6)

(2-7)

3. 表头行为模型的建立

3.1. 激励和外部参数输入部分

3.2. 系统响应特性部分

(3-1)

3.3. 输出执行部分

Figure 2. Principle analysis chart of accelerometer adding acceleration

Figure 3. Behavioral model quartz flexible accelerometer header

(a) (b) (c)

Figure 4. Model of analog quartz flexible accelerometer meter. (a) Model of input and system response; (b) Model of the system response; (c) Model of the analog differential capacitor module

(3-2)

(3-3)

(3-4)

(3-5)

，且，当Uqfa的值增加时，C1的值是减小的，C2的值是增加的；并且可求得，即和值为定值，符合实际表头的特性。

3.4. 表头的整体模型

(3-6)

4. 模型的验证

Figure 5. Behavioral model of header

Figure 6. Experiment of header open loop step response

Figure 7. Circuit of header model validation

Figure 8. Simulation charts of header model validation circuit

5. 模型的应用

Figure 9. Constituted closed loop readout circuit of accelerometer meter model

(a) (b)

Figure 10. Simulation of constituted closed loop readout circuit of accelerometer meter model

(a) 10 Hz (b) 70 Hz(c) 110 Hz

Figure 11. Bandwidth test

Figure 12. Eight roll gravitational field experiments

6. 结语

Study of Behavior Model of Quartz Flexible Accelerometer Header[J]. 电气工程, 2016, 04(01): 81-89. http://dx.doi.org/10.12677/JEE.2016.41011

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