二阶线性时不变测量系统动态特性的补偿与动态不确定度评估  

Compensation of Dynamic Characteristics and Evaluation of Dynamic Uncertainty for a Measurement System Modeled by a Second-order Linear Time Invariant Model

作　　者：胡红波[1] 孙桥[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《计量学报》2013年第2期106-110,共5页Acta Metrologica Sinica

摘　　要：采用一种新的设计测量系统补偿滤波器的方法，根据校准得到的测量系统频率响应数据直接设计补偿滤波器，避免了系统辨识过程。通过接近实际测量条件的仿真实验表明，该方法能有效地提高测量系统的带宽，减小动态误差。同时，按照GUM推荐的不确定度评定准则，对整个动态测量过程，包括动态补偿以及滤波运算过程的不确定度进行了评估，得到了经过补偿后系统输出的被测量以及对应的动态不确定度曲线。A novel method is proposed for the design of the system compensation filter. The compensation filter is directly designed according to the frequency response data obtained by dynamic calibration, which avoiding the process of system identification. The whole process is illustrated by the realistic simulation and proved that the method can improve the dynamic characteristics effectively and reduce dynamic error. Furthermore, the uncertainty of the whole measurement process including dynamic compensation and filter process is evaluated under frame of the GUM uncertainty, and finally the output of the compensated system and its uncertainty are obtained.

关 键 词：计量学 动态误差 补偿滤波器 频域最小二乘法 动态不确定度 

分 类 号：TB936[一般工业技术—计量学]