A novel decentralized feedforward control strategy for a plate vibration without secondary path modeling using piezoelectric patch actuators

Here, a novel decentralized feedforward control strategy for a plate vibration without secondary path modeling was proposed. This control method did not need any structure information of a plate and it could be used to control the harmonic vibrations of a plate at its off-resonance frequencies. A theoretical model and a test system for active vibration control of a plate supported simply using piezoelectric patch actuators and accelerometers were built. The stability of the control method was analyzed theoretically and experimentally. Besides, a kind of internal modal filter (IMF) was proposed, with it a acceleration signal could be converted into a velocity one. This IMF could guarantee the collocated properties of transducer pairs. Both simulation and test results showed that the decentralized feedforward control strategy is effective.