基于MBN检测的励磁控制及波形校正  

Excitation Field Strength Control and Waveform Distortion Correction Based on MBN Testing

作　　者：狄静宇 何存富[1] 刘秀成[1] 李永春 DI Jing-yu;HE Cun-fu;LIU Xiu-cheng;LEE Yung-chun(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Department of Mechanical Engineering,Cheng Kung University,Tainan 70101,China)

机构地区：[1]北京工业大学材料与制造学部,北京100124 [2]台湾成功大学机械工程学系,中国台湾台南70101

出　　处：《仪表技术与传感器》2021年第9期92-98,共7页Instrument Technique and Sensor

基　　金：国家自然科学基金资助项目(11527801)。

摘　　要：在MBN无损检测中,励磁强度和波形会受到多种因素影响。基于MBN检测标准化及不同MBN检测系统结果直接对比的需求;从系统设计角度,基于MATLAB/Simulink进行PID负反馈控制系统设计;对MBN检测进行励磁强度稳定控制和波形畸变校正,并且实施了计算机动态仿真实验。MBN检测系统为一阶系统,设定输入和输出信号确定系统参数;在输出端设定谐波分量来模拟波形畸变,进行励磁波形畸变校正;设定励磁强度增大到初始值1.4倍和减小到0.6倍,进行励磁强度稳定控制。仿真结果表明:应用PID控制器可以有效抑制高次谐波降低波形畸变率,并且可对励磁强度进行无静态误差的稳定控制。For MBN nondestructive testing,excitation field strength and waveform are affected by many factors.Based on the requirements of standardization of MBN detection and direct comparison of results of different MBN detection systems,from system design perspective,the negative feedback PID control system based on MATLAB/Simulink was designed.The excitation field strength on MBN testing was stably controlled and the waveform distortion was corrected,then the computer dynamic simulation was carried out.The MBN testing system was a first-order system,by setting the input and output signal,the system parameters were determined.The harmonic components were set to simulate distortion at output,then the waveform distortion correction was performed.By setting the excitation intensity to increase to 1.4 times of initial and decrease to 0.6 times,then the intensity stable control was implemented.The simulation results show that the PID controller can suppress higher harmonics,reduce distortion effectively,and the excitation intensity can be stabilized without static error.

关 键 词：MBN检测 波形畸变校正 励磁控制 PID控制器 检测标准化 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TH878[自动化与计算机技术—计算机科学与技术]