Abstract
A conventional milking machine may damage cows'teats, because the suction mechanism is driven by a pneumatic pulsator at a constant frequency. It is known that in natural feeding of calves, a l/f fluctuation signal occurs. This paper describes the performence of a new linear pulsator used instead of a pneumatic pulsator in a milking machine.The linear pulsator is drivenby a cylindrical linear oscillatory actuator (LOA) that is compact and weight light, with external dimensions of φ25 × 35mm, a mass of 114 grams,and a maximum static thrust of 8.2 newtons. It can drive a real load at a frequency of 1 Hz and a voltageof 14 volts, with a stroke of ±2mm. The linear pulsator that contains the LOA is capable of operating with a I/f fluctuation signal, and can realize pressure pulsation a ranging from 41 to 71 beats per minute.
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