| 摘要 |
An improved system for detecting and controlling vibration of a wound roll (18) includes a programmable controller (50) to which the line speed of a web, diameter of the wound roll and vibration of the wound roll feedback is provided. The wound roll rotational frequency from the line speed and diameter feedback is computed and used to filter the vibration feedback so the components of the vibration due solely to the rotation of the wound roll are isolated. These components are provided to a level detector (84, ll6) which decelerates the winding machine when a predetermined vibration level is reached. The rotational frequency may be used to calculate coefficients for a band pass filter (80) which filters vibration feedback. Alternatively, a Fast Fourier Transform analysis may be performed upon the vibration feedback and the rotational frequency used as a pointer to identify the amplitude of the component due to the rotation of the wound roll. |
