作者：李玲玲1, 范锦彪1,2, 王燕1,2
作者单位：1. 中北大学电子测试技术重点实验室, 山西 太原 030051;
2. 中北大学计算机与控制工程学院, 山西 太原 030051
关键词：信号处理;刚体过载;低通滤波;侵彻
摘要：
针对实测侵彻混凝土数据进行刚体过载提取时,没有明确研究其具体的滤波方法,提出一种适合实时提取刚体过载的滤波方法。根据侵彻加速度信号的特征构造理想侵彻信号,分析常用的巴特沃斯、切比雪夫I、椭圆形、贝塞尔滤波器对理想侵彻加速度信号滤波之后的峰值误差与积分误差,提出将7阶切比雪夫I滤波器与FRR方法相结合的滤波方法,并在侵彻素混凝土的实测试验数据中进行验证。用此滤波方法对实测数据进行处理,得到的弹体刚体过载的一次积分与二次积分与实测数据的一次积分速度和实测侵彻深度的相对误差分别小于5%和10%,滤波前后积分速度保持非常好的一致性。
Filtering method for real-time extraction of rigid body overload in penetration process
LI Lingling1, FAN Jinbiao1,2, WANG Yan1,2
1. National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China;
2. Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education, North University of China, Taiyuan 030051, China
Abstract: Up to now, no specific filtering methods have been reported from the studies at home and abroad on real-time acquisition of rigid body overload in penetration of concrete data. This paper proposed a most suitable filtering method for real-time extraction of rigid body overload in concrete penetration. An ideal penetration signal was constructed according to the characteristics of penetration acceleration signal. The peak error and integral error were obtained after the ideal signal was filtered via Butterworth, Chebyshev I, Oval and Bessel filters. The filtering method of combining 7-order Chebyshev-I filters and FRR method were put forward and validated through the measured test data of penetrated plain concrete. The data was furthered analyzed through the combined filtering method to acquire a first and second integration of rigid body overload, and the relative errors of which with the first integral of the measured data and the measured penetration depth were less than 5% and 10% respectively. The integral velocities before and after the filtering keep a good consistency.
Keywords: signal processing;rigid body overload;low-pass filter;penetration
2015, 41(11): 106-109,113 收稿日期: 2015-05-21;收到修改稿日期: 2015-06-19
基金项目:
作者简介: 李玲玲(1992-),女,山西长治市人,硕士研究生,专业方向为测试计量技术与仪器。
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