一种提高电动振动台低频控制精度的方法  

A METHOD FOR IMPROVING LOW FREQUENCY CONTROL PRECISION OF ELECTRICAL VIBRATION TABLE

作　　者：李宁[1] 那文波[1] 柒丽娟[1] 王宏亮 

机构地区：[1]中国计量学院 [2]北京军区66440部队

出　　处：《计算机应用与软件》2010年第9期178-180,共3页Computer Applications and Software

摘　　要：介绍小波多分辨分析及其原理,提出一种提高电动振动台低频控制精度的综合算法。电动振动台在通过加速度传感器时得到的信号含有一定的噪声,导致振动控制精度不高。先用小波包将噪声去除,再进一步采取多分辨分析对信号进行分解,从而提高电动振动台在进行随机振动时的低频精度。Wavelet multi-resolution analysis and its principle were introduced, and a kind of integrated algorithm for improving low-frequency control precision of the electrical vibration table was proposed. The signal of electrical vibration table gained when passing the acceleration sensor contains a certain amount of noise, this leads to the result of low control precision. In the integrated algorithm, the noise was firstly elim- inated by the wavelet packet,and then the denoised signal was further decomposed by multi-resolution analysis, thereby the low frequency pre- cision of electrical vibration table when vibrating randomly was improved.

关 键 词：随机振动 小波分析 小波包 低频 多分辨率 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]