摘要
针对现有GMM-FBG电流传感器的磁滞非线性问题,在经典Preisach模型的基础上提出了一种改进的Preisach磁滞模型,给出了改进后的Preisach模型密度函数和模型分析方程,对频率依赖的模型参数进行辨识,提高了模型对动态磁滞曲线的预测精度;并运用改进后的模型对GMM-FBG电流传感器进行磁滞建模及实验验证。实验结果表明该模型能够较好的预测GMM-FBG工频电流传感器的磁滞非线性,模型的预测误差在3.6%以内,传感系统电流测量灵敏度可达到0.069 nm/A。
According to the hysteresis nonlinearity of GMM-FBG current sensor,the improved Preisach hysteresis model is proposed on the basis of classical Preisach model,whose density function and model analysis equation are proposed too,and the frequency dependent model parameters are identified,which is capable to improve the predictions accuracy of dynamic hysteresis curve.Hysteresis modeling and experimental verification are carried out using the improved model on GMM-FBG current sensor.The experimental results show that this model can better predict hysteresis nonlinearity of GMM-FBG current sensor in power frequency,the prediction error within 3.6%,sensing system current measurement sensitivity for 0.069 nm/A.
出处
《传感技术学报》
CAS
CSCD
北大核心
2013年第4期487-491,共5页
Chinese Journal of Sensors and Actuators
基金
河北省科学技术研究与发展计划科学支撑计划项目(12211703)
