Decentralised control using multiple velocity feedback loops with inertial actuators

Baumann, Oliver N. and Elliott, Stephen J. (2006) Decentralised control using multiple velocity feedback loops with inertial actuators. Proceedings of the Sixth International Symposium on Active Noise and Vibration Control, ACTIVE 2006, Adelaide, Australia. 18 - 19 Sep 2006. 13 pp .

Abstract

This paper presents simulations and experimental results of active structural control of a vibrating plate using multiple velocity feedback loops with inertial actuators. A time domain model of a plate with multiple collocated inertial actuators and velocity sensors is presented. A fixed gain, velocity feedback controller is designed by minimising the total kinetic energy of the plate subject to a control effort limit and this optimal controller is compared with the more simple case in which each local loop has an identical gain. The stability of the control system is then discussed in terms of the open loop frequency response and it is demonstrated that the gain margin of the control system decreases with increasing numbers of control loops. The design and construction of an experimental rig with twenty-four sensor and actuator pairs is discussed. The results obtained from experimentation are compared with those from simulations. Very good attenuations in the ten modes up to 200Hz are predicted and observed.

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