Stability, performance and power consumption of a centralised and decentralised active vibration control system

This paper presents simulations and experimental results on the stability, performance and power consumption of a Multiple Input Multiple Output (MIMO) Active Vibration Control (AVC) system comprising six inertial mass actuators (IMAs), when centralised and decentralised velocity feedback control architectures are implemented. The open-loop (OL) matrices for the centralised and decentralised systems are calculated and the AVC stability is assessed using the generalised Nyquist criterion for both control architectures. The control performance and the apparent power consumption of the AVC system IMAs are compared and discussed. Additionally, the percentage of reactive power is evaluated. Initial results show that both control architectures achieve similar control performances for simulations and measurements. However, the measured total apparent power as well as the reactive power consumption is higher than in simulations. Measurements show higher reactive power for the decentralised AVC.