数值微分的测试系统参数估计

Parameter estimation of measurement systems based on numerical differentiation

根据动态校准实验结果建立测试系统的动态数学模型来研究测试系统的动态性能,是检测技术的一个重要内容.采用数值微分方法直接对测试系统的结构参数进行估计,可以直接得到测试系统的结构参数,具有简单明了的特点.计算结果表明,即使在测量数据中混有一定水平的随机干扰,只要合理选择参数,也能得到较高准确度的估计结果,说明该方法是一种行之有效的建模方法.

Dynamic modeling of measurement systems is an important aspect in the field of instrument techniques. Numerical differentiation is applied to estimate the structural parameters of measurement systems. Experimental results show that dynamic modeling by numerical differentiation is effective even if there is noise of definite magnitude in the measurement data.