Project ObjectivesScientific objectives To study guided waves in composite blades and determine the optimal frequency and location of the transducers for exciting wave modes and focusing the propagation. To investigate the effects of low frequency vibrations in wind turbine blades and determine the maximum forces that the shakers can safely induce in the structure. To determine the effects of the low frequency vibrations on the fatigue performance of the blades and the blade dynamics. Technological objectives To optimise COTS high power transducers for use in the de-icing system to deliver at least 1 W/cm2, three times higher than previous attempts. To develop new controllable low frequency shakers for use on blades that can deliver acceleration of at least 30g. Objectives To deliver pulser-receiver electronics for the ultrasonic transducers that can operate at -40oC. To integrate the above mentioned subsystems along with a market ready ice detection system into a complete prototype system. Operational To validate the DeICE-UT technology to different ice formation conditions for a composite test sample. To demonstrate the system installed on a sample blade part of dimensions a few metres in length and width that will demonstrate the long range effects of the ultrasonic de-icing system in a wind tunnel.