摘要
文章介绍了脉冲电磁场电流信号测控技术中的两个关键部分:信号采样分析和幅值输出控制的方法。在对方波频谱进行数学分析的基础上,结合硬件条件选择恢复波形的采样频率。通过对采样点的处理,给出了计算方波幅值和频率的方法。为了克服感抗与电流频率之间的耦合,利用反馈的方式对电流幅值进行控制。实验证明,以上方法能够达到较高的精度和有效的控制。
In this paper, signal sampling and analysis together with amplitude control method, which are two key parts of the measurement and control system in pulsed electro-magnetic field generator, are discussed. Based on the analysis of spectrum of pulsed wave, the sampling frequency is selected according to the performance of hardware. Then the calculation method of wave parameters is introduced. As the inductance resistance is related to current frequency, the amplitude is controlled by feedback. Experiments show that the system can achieve a satisfying precision and an effective control.
出处
《计算机测量与控制》
CSCD
2004年第10期987-989,共3页
Computer Measurement &Control
基金
中国科学院知识创新工程重大交叉学科前沿项目资助课题(KJCX1-09-02)
