闭环光纤电流传感器高阶动态模型及仿真

为研究光纤电流传感器脉冲电流测量能力,建立了传感器离散域高阶动态模型,并基于Simulink对传感器阶跃响应及频率响应特性进行仿真分析.结果表明:增大前向增益可提高传感器的响应速度和带宽,但过大的前向增益将会使系统超调振荡;滑动平均滤波器对超调振荡有明显的抑制作用,但同时也会降低系统的响应速度和测量带宽.搭建了频率响应...

High-order Dynamic Model and Simulation of Closed-loop Fiber-optic Current Sensor

In order to study the pulse current measurement capability of the fiber-optic current sensor, a high-order dynamic model of the sensor in the discrete domain was established, and the step response and frequency response characteristics of the sensor were simulated and analyzed based on Simulink. The results show that increasing the forward gain can improve the sensors response speed and the bandwidth, but too large forward gain will cause the system to overshoot the oscillation, the moving average filter will obviously suppress the overshoot oscillation, but it will also reduce the systems response speed and measurement bandwidth. Finally, a frequency response test platform was built, and the frequency response characteristics of the sensor were tested under different forward gains and filter orders, the non-reciprocal step phase difference was introduced based on the phase modulation principle of the sensor, and the equivalent test of the step response was achieved. The test results of frequency response characteristics and step response characteristics are in good agreement with the simulation results, which proves the accuracy of the model.