信号输入通道的逆向建模及其在提高智能仪表测量精度中的应用

The inverse modeling of a signal input channel and its application to the improvement of an intelligent instrument for its accuracy

本文采用时变系数多项式即静态非线性函数对信号输入通道进行逆向建模。借此模型 ,克服零点漂移及增益漂移对检测精度的影响 ,补偿信号输入通道的非线性 ,实现了数据的规范化处理。将此模型用于数字控制器的设计 ,取得了预期的效果。

This paper describes the development of the inverse modeling of a signal input channel by using a polynomial with time varying coefficients.Based on this model both zero and gain drifts of the input channel can be corrected and its nonlinearity can be offset.Furthermore,the data normalization can also be done.This model has been applied to the design of a digital controller,yielding an expected result.