摘要
介绍基于双离心机的线加速度计动态校准方法，在分析双离心机原理的基础上，对各加速度分量进行合成，建立了基于双离心机的正弦加速度数学模型．阐述了线加速度计动态校准装置的组成和校准过程，分析了校准装置所产生的正弦加速度的幅值测量不确定度和相位测量不确定度．介绍了实验数据的处理方法三参数正弦波拟合算法，并在正弦加速度幅值为200m／s^2、角频率范围为0．1～10 Hz的条件下进行了实验验证，给出了相应的实验曲线图．线加速度计动态校准装置具有产生大g值正弦加速度的优点，正弦加速度幅值可达700m／s^2．
A dynamic calibration method for linear accelerometers based on double centrifuge was introduced. Each acceleration source was synthesized on the basis of analyzing the theory of double centrifuge, and the mathematical model of sine acceleration based on the double centrifuge was established. The device for dynamic calibration of linear accelerometers and the process of calibration were described. The amplitude measurement uncertainty and the phase measurement uncertainty of sine acceleration generated by the device were evaluated. The three-parameter sine-curve-fitted algorithm was used for data processing. Some experiments were finished and the relevant experiment curves were given when the sine acceleration amplitude was equal to 200 m/s^2 and the angular frequency range was from 0. 1 Hz to 10 Hz. The device for the dynamic calibration of linear accelerometer has the advantage of generating large amplitude sine acceleration, and the largest amplitude can reach 700 m/s^2.
出处
《测试技术学报》
2009年第4期283-287,共5页
Journal of Test and Measurement Technology
关键词
双离心机
正弦加速度
线加速度计
动态校准
曲线拟合
double centrifuge
sine acceleration
linear accelerometer
dynamic calibration
curve-fit
