强激光与粒子束2011，Vol.23Issue(12)：3431-3436,6.DOI:10.3788/HPLPB20112312.3431
电磁脉冲测试系统的非线性辨识建模与性能补偿
Nonlinear identification modeling and compensating of electromagnetic pulse measurement system
摘要
Abstract
A method of Hammerstein model direct identification under step-like signal excitation is proposed to build a non-linear model of the pulse voltage measurement system in continuous domain. With the dynamic calibration data in time-domain, the system's Hammerstein model with a four-order polynomial nonlinear element and a three-order linear element in continuous domain is established. The measured results verify the validity of the model. Then a compensation element to improve the sensor' s dynamic performance is designed, which includes a dynamic linear compensator and a static nonlinear corrector. After compensa-tion, the lower cut-off frequency of the system widens from dozens of kHz to DC, and the response time of the system shortens form μs level to ns level. The feasibility of the compensation design is also verified by the reconstruction result of measured pulse.关键词
电磁脉冲/系统辨识/连续域/准阶跃信号/Hammerstein模型/动态补偿Key words
electromagnetic pulse/ system identification/ continuous-domain/ step-like signal/ Hammerstein model/ dynamic compensation分类
信息技术与安全科学引用本文复制引用
刘卫东,刘尚合,毕军建,胡小锋..电磁脉冲测试系统的非线性辨识建模与性能补偿[J].强激光与粒子束,2011,23(12):3431-3436,6.基金项目
国家自然科学基金项目(10927506) （10927506）
国家自然科学基金青年基金项目(61001050) （61001050）
