一种对磁电式速度传感器进行动态补偿的新方法

在已知磁电式速度传感器传递函数的情况下,采用优化技术设计了动态数字滤波器。在不改变传感器高频特性的情况下,扩展了传感器的低频工作范围。该设计方法基于系统辨识,一切算法都在时间域内完成,可全部借助于计算机进行处理。实践证明,采用该方法可以有效地改善传感器及其它测量系统的动念特性。文中的模型定阶准则是在设计磁电式速度传感器的动态补偿数字滤波器时,采用其它准则都不易实现的情况下提出来的,具有一定的通用性。最后,计算了一个设计实例。

A new methed of dynamic compensation for electro-magnetic velocity transducers

This paper presents a new method of dynamic compensation for electro-magnetic velocity transducers by adopting optimum design on the condition of transfer function of transducer being given. This method extends the working range in low frequency section. The proposed design method is based on system identification in time domain and can be completed with computer calculation. Experimental results show that this method can well improve the dynamic property of transducers as well as other measurement systems. The adopted criterion for determining orders of the model is not only suitable for the electro-magnetic velocity transducer, but also possesses a commonly used meaning. Finally, a real design example is presented.