基于参数辨识的一种动态补偿数字滤波器  

Dynamic compensated digital filter based on parameter identification

作　　者：毛建东[1] 李娟[2] 

机构地区：[1]西北第二民族学院电子与信息工程系,宁夏银川750021 [2]西北第二民族学院设计艺术系,宁夏银川750021

出　　处：《传感器技术》2004年第10期82-83,86,共3页Journal of Transducer Technology

摘　　要：提出了一种能明显改善系统动态性能的动态补偿数字滤波器。分析了动态补偿数字滤波器的基本原理。为了使动态补偿滤波器始终工作在最佳参数状态下,且更具有通用性,结合参数辨识,利用基于Householder变换的自适应最小二乘法对传感器的动态性能进行在线补偿,其特点是数值稳定性好、估计精度高。试验表明:对动态品质较差的双孔悬臂梁式压力传感器进行在线补偿,可以使其动态性能得以较好的改善。A dynamic compensated digital filter is presented for improving dynamic performance.The basic principle of dynamic compensated digital filter is analyzed.In order to make the dynamic compensated digital filter work in a state of the optimum parameter all the time and have the more common use,the parameter identification methord is combined and adaptive least square method based on the Householder transformation is use to make dynamic performance of the transducer be compensated on-line, characteristic of the method is good value stability and high estimation accuracy.Experimentation proves after the double-hole-cantalever girder-pressure transducer which has the bad dynamic performance is compensated on-line,the dynamic performance can be improved.

关 键 词：动态补偿 参数辨识 Householder变换 自适应最小二乘法 数字滤波器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN713.7[自动化与计算机技术—控制科学与工程]