SPATIALLY CONVOLVING WAVE SENSORS FOR STRUCTURAL CONTROL - PART II - EXPERIMENTAL-VERIFICATION USING PVDF SENSORS

This paper attempts to confirm experimentally, an approach for sensing actual disturbance information which can propagate along one-dimensio nal structural waveguides. In this work, a polyvinylidene fluoride-PVD F distributed wave sensing scheme is reported which exploits the chara cterization of 1-dimensional structural motion in terms of traveling w aves. Design and manufacture of a spatially convolving wave sensor is discussed. This spatially convolving wave sensor is then used on an ex perimental test beam to control structural vibration using a feedforwa rd control law. Experimental results indicate that the sensor is capab le of sensing directional wave propagation dynamics. In addition, acti ve vibration suppression can be achieved over several modes of the str ucture using a feedforward control law.