复合跟踪微分器在电容式位移传感器中的应用

针对从含噪原始信号中提取位置以及速度信息,经典跟踪微分器存在不能很好兼顾相位滞后和噪声放大问题、参数多,调试复杂等不足.在跟踪微分器等效线性分析基础上,提出复合形式跟踪微分器,用于电容式位移传感器位置信号跟踪以及速度信号估计,通过MATLAB\SIMULINK仿真以及实验平台测试,结果表明:在跟踪频率1 Hz、幅值1含噪声正弦信号中,复合跟踪微分器能光滑逼近原始位置信号,且能有效进行速度估计,相较于经典跟踪微分器,复合跟踪微分器跟踪相位滞后小0.03 rad,能更好兼顾跟踪信号相位滞后及速度信号噪声放大.

The application of composite differential tracker to capacitive position sensor

The general form of differential tracker cannot properly deal with the problems of signal tracking phase lag, noise amplification, many parameters and complicated debugging when obtaining position information and velocity signals from a capacitive position sensor containing random disturbances. Based on the equivalent linear analysis of differential trackers, a composite form of differential tracker was proposed for position signal tracking and velocity signal estimation of position capacitive sensors. The simulations and experimental tests of MATLAB \\ SIMULINK show that the composite differential tracker can approach the original smoothly and the position signal and the velocity signal can be effectively extracted. Compared with the general form differential tracker, the tracking signal phase lag and the speed signal noise can be better taken into account.