[121] Active vibration control based on cost-effective microcontroller
A Zippo, F Pellicano and G Iarriccio
Università degli Studi di Modena e Reggio Emilia, Italy
In this paper, the active vibration control (AVC) problem is effectively treated covering all the aspects of a control problem. The structure under study is a honeycomb panel of carbon fibre. AVC is, in general, applied by means of costly devices and equipment, which could lead to a limitation for practical applications. A cost-effective and practical solution to AVC problems has been developed and tested using a micro-controller unit (MCU) from Texas Instruments. The control problem is studied by subjecting the plate to out-of-plane disturbance using an electrodynamic shaker, exciting the identified modes by experimental modal analysis. The sensor and actuator for the control problem is a piezo patch. Multiple analogue signal processing circuits were developed to scale and shift the signal at the input and output of the MCU. The control algorithm proposed is based on the positive position feedback (PPF) technique. A series of tests were performed using pure sine excitations at frequencies of interest. The result of the experiments revealed a velocity attenuation of 50% to 77% and power spectral density (PSD) attenuation of 5.8 to 12.8 dB, depending on the mode under study. Owing to the size and mass properties of the macro-fibre composite (MFC) patches, the control system is very much suitable for automobile and aerospace applications.
