基于有效幅值的电磁兼容预测模型

为了对某探测系统不同工况下的电磁兼容性进行准确、快捷的预测,提出了基于有效幅值的电磁兼容预测模型.首先,根据该探测系统的工作原理定义了有效幅值,并利用配谐电路和带通滤波电路的幅频响应给出了有效幅值的计算方法.然后,用高度为敏感度阈值的平面去切割有效幅值的三维曲面,得到电磁兼容的分界线.最后,利用电磁测量传感器对辐射干扰进行直接测量,由辐射干扰的频率和幅度所决定的坐标,判断是否电磁兼容.实验验证了该预测模型的准确率为97.4％.

Electromagnetic compatibility prediction model based on effective amplitude

Aiming to predict the electromagnetic compatibility (EMC) of a detection system on different working status correctly and quickly,the EMC prediction model based on effective amplitude is put forward.Firstly,according to the working principle of detection system,effective amplitude is defined,and the computation method of effective amplitude is given by amplitude-frequency response of matching circuit and bandpass filter circuit.Then,the three dimensional surface of effective amplitude is incised by the plane at the height of sensitivity,and the EMC boundary is obtained.Lastly,radiated interference is measured by electromagnetic measuring sensors.The conclusion that the detection system is electromagnetic compatible or not can be drawn with the help of the coordinate,which is decided by frequency and amplitude of radiated interference.Accuracy rate of the prediction model is 98.6 ％ by experiment.