EXPERIMENTAL RESEARCH ON ACTIVE VIBRATION CONTROL OF PIPE BY INERTIAL ACTUATOR AND ADAPTIVE CONTROL

Vibration of pipe on ships and submarines is undesirable as it may induce noise and transmit it to the sea, as well as promote fatigue, even cause damage to pipe. The most significant part of its frequency spectrum is shaft frequency. It changes with pump’s rotation speed. Traditional vibration absorber cannot adjust automatically according to the change of vibration frequency and they can only achieve significant result in very narrow frequency range. To improve vibration absorber’s effect, active control technology is introduced. This paper reports experimental research on vibration suppressing of pipe by using inertial actuator. Firstly, present characteristics of vibration in pipe-pump system. Then, present the structure and parameters of inertial actuator, and explaining the control algorithm. It is mainly consist of frequency analysis algorithm and adaptive control algorithm. Control programs were executed on a digital signal processing system. Experiments were carried out on a closed pipe-pump system. Acceleration of with and without control was measured and recorded when the pump in the pipe system is working at different rotation frequency. The results revealed that inertial actuator can suppress the shaft vibration of pipe at both control point and foundation.