| 摘要 |
An improved system for detecting and controlling vibration of a wound roll in a winding machine includes a programmable controller to which the line speed of a web, diameter of the wound roll and vibration of the wound roll feedback is provided. The programmable controller computes the wound roll rotational frequency from the line speed and diameter feedback and uses this information to filter the vibration feedback so that the components of the vibration due solely to the rotation of the wound roll are isolated. The isolated vibration components are provided to a level detector which decelerates the winding machine when a predetermined vibration level is reached. In one embodiment, the rotational frequency is used to calculate coefficients for a band pass filter which filters the vibration feedback. In a second embodiment, a Fast Fourier Transform analysis is performed upon the vibration feedback and the rotational frequency is used as a pointer to identify the amplitude of the component due to the rotation of the wound roll. |
