ACTIVE VIBRATION CONTROL OF A PAPER （一篇论文的振动主动控制问题）.pdfVIP

6th International DAAAM Baltic Conference INDUSTRIAL ENGINEERING 24-26 April 2008, Tallinn, Estonia ACTIVE VIBRATION CONTROL OF A PAPER MACHINE ROLL Juhanko.J; Porkka, E.; Kuosmanen, P.; Valkonen, A; Järviluoma, M. Abstract: In process machines unexpected the main reasons for the second harmonic vibration behaviour may cause severe response at critical frequency which often problems when passing the resonance restricts the running speed of a paper frequencies. In paper machines it is often machine [2]. By using active vibration impossible to avoid sub-critical rotation control better runnability, less quality speeds because of great number of variation of paper and increased life time different type of rolls and continuously of roll covers and bearings could be changing process parameters. Uneven achieved. moment of inertia of the rotor and second harmonic of rotational error motion of the 2. EXPERIMENTAL SETUP bearings are the main reasons for the second harmonic response at critical In this research a servohydraulic device frequency which often restricts the running was built for active vibration control of speed of a paper machine. By using active large-scale rotors. The test rotor was 5 vibration control better runnability, less meter long paper machine roll, which was quality variation of paper and increased supported by standard roller bearings. The life time of roll covers and bearings could device was a rigid frame with three be achieved. servohydraulic cylin