Active vibration control of an inertial actuator subject to broadband excitation

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Camperi, S.^1 ; Ghanchi-Tehrani, M.^1 ; Zilletti, M.^1 ; Elliott, S.J.^1

Institute of Sound and Vibration Research, University of Southampton, Southampton

SO17 1BJ, United Kingdom^1

关键词: Active vibration controls;    Broadband excitation;    Dynamic equations;    Engineering applications;    Inertial actuators;    Random disturbances;    Time-domain simulations;    Velocity feedback;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012038/pdf
DOI  :  10.1088/1742-6596/744/1/012038

来源: IOP

【 摘 要 】

Active vibration control has been widely used in many engineering applications in order to minimise vibrations in structures, when subjected to broadband random disturbances. Feedback control in the form of velocity feedback is considered in this paper, which generates a damping force proportional to the velocity. The control gain is tuned in such a way to minimise the kinetic energy of the system. In this paper, an inertial actuator excited by a random voltage is considered and an active control is implemented. The dynamic equations of the system are derived and the response is obtained with and without control. The stability of the system is analysed using the Nyquist plot. The response of the actuator is obtained from time domain simulations using Matlab. The effect of the control gains are also investigated on the responses. Energy analysis shows how the energy in the system decreases by increasing the feedback gain up to a stability limit.