ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

The problems about extracting cleaning signals in the heavy noise and its hardware implementation were discussed. The Butterworth filter was proposed to distinguish the vibration noise and the grain signals. The lowest order of filter to meet performance was determined according to its transition region width and stop-band attenuation. An 8-order Butterworth filter used VCVS topology structure as basic units was constructed by class-bind method. Analogue simulation of the high order filter was proceeding on EWB and refining test was proceeding on the combine. Experimental results was well coincided with simulation results and showed good filtering property in extracting grain signals in the heavy noise of combine.