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-dimensional structural waveguides. In this work, a polyvinylidene fluoride-PVDF distributed wave sensing scheme is reported which exploits the characterization of 1-dimensional structural motion in terms of traveling waves. Design and manufacture of a spatially convolving wave sensor is discussed. This spatially convolving wave sensor is then used on an experimental test beam to control structural vibration using a feedforward control law. Experimental results indicate that the sensor is capable of sensing directional wave propagation dynamics. In addition, active vibration suppression can be achieved over several modes of the structure using a feedforward control law.