LaCoste Romberg ET型重力仪数字静电反馈系统的研制

摘要

介绍以计算机技术和采用数字比例积分微分控制器控制算法研制的数字式静电反馈系统的工作原理,并将该系统用于LaCoste & Romberg(LCR)ET20型重力仪的升级改造中.改造后LCR ET20重力仪的观测结果表明,该系统能解决模拟静电反馈系统中线性度不易调整和长期稳定度差等问题,并能提高重力仪的观测精度.%The principle of the digital electrostatic feedback system developed with computer technology and control algorithm of digital PID( Proportion Integral Derivative) control is systematically introduced. In addition, it is the first time in China that this new system is successfully used in the update of LaCoste & Romberg (LCR) ET20 gravimeter. The experimental results of the LCR ET20 gravimeter with the new system installed show that problems of analog electro-feedback system, such as the difficulty to adjust linearity and the worse long-term stability, are basically resolved. Moreover, the precision of gravimeter has increased.