液压系统中油箱温度信号的小波消噪处理

The temperature signals of tank in hydraulic system de-noised by wavelet transform

为高精度对液压系统进行状态监测、在线自动控制,要通过传感器获取液压系统工作时的油箱温度数据,并对含噪的油箱温度信号进行消噪处理。针对不同小波基处理信号时的效果不同,探讨了正交小波基和具有线性相位的双正交小波基对不同噪声水平信号的消噪效果,得出选择小波基的一般方案,并选用双正交小波基对油箱温度信号的消噪处理。

In order to carries on the condition monitor or the online automatic controls more precise,through the sensor to get the temperature data of the tank in hydraulic system and to carry on the denoising of the noised temperature signals.In view of the different wavelet base has the different de-noising effect,has discussed the orthogonal wavelet base and the linear phase biorthogonal wavelet base to the different noise level signal,has obtained two wavelet base's general selection scheme,has selected the biorthogonal wavelet base to the temperature signal de-noising processing.