• CN:11-2187/TH
  • ISSN:0577-6686

›› 2010, Vol. 46 ›› Issue (18): 36-40.

• 论文 • 上一篇    下一篇

精密离心机加速度载荷模型研究

吴付岗;王军   

  1. 中国工程物理研究院总体工程研究所
  • 发布日期:2010-09-20

Research on Acceleration Load Model of Precision Centrifuge

WU Fugang;WANG Jun   

  1. Institute of Systems Engineering, China Academy of Engineering Physics
  • Published:2010-09-20

摘要: 分析地球自转及地球引力对精密离心机上加速度计实际承受载荷的影响,得到加速度载荷中的地球自转修正量和地球引力修正量。在此基础上,将静止状态下被测加速度计工作轴向为本地重力加速度方向时的输出值作为基准值,调整转台转速使得旋转状态下加速度计输出值等于基准值,然后用修正的加速度载荷公式计算此状态下的工作半径,并将其作为半径基准对其他旋转状态下的动态工作半径进行测量,进而获得一个与静态工作半径和方位失准角无关的加速度载荷模型。该模型可消除由于加速度计质心位置无法精确定位所带来的静态工作半径和方位失准角测量误差问题,有效提高精密离心机的加速度载荷给定精度。

关键词: 补偿, 加速度载荷, 精密离心机

Abstract: The effects of earth’s rotation and G-force on actual acceleration load for an accelerometer mounted on the precision centrifuge are analyzed, and the corrections are obtained respectively. On the basis of which, the output voltage of the measured accelerometer on the rotating precision centrifuge is adjusted to the reference value which is the output voltage on condition that its operating axial direction is the same direction of g-force by making speed regulation, its operating radius is calculated by the corrected acceleration formula, and the dynamic operating radius on other rotating condition is measured based on it. At last, an acceleration load model irrelevant to static operating radius and azimuth misalignment is presented. The method is successful for reducing measurement error of operating radius and azimuth misalignment which is due to the inadequate positioning precision of the centroid of the accelerometer, and is effective to improve the given accuracy of acceleration load of precision centrifuge.

Key words: Acceleration load, Compensate, Precision centrifuge

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