Environmental Engineering Reference
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of plane acceleration and can be used for so-called collocated control as discussed
above. The sensor array measures the structural response of the blade. However,
fl ow measurement devices could be considered in the future.
Also, the actuator design was updated. The Thunder TM actuator was placed at
the suction side instead of the center of the profi le to form a hard. In addition, stiff
dissected foam was used to fi ll the remainder of the profi le. High modulus foam
was used to prevent the indentation under the dynamic pressure during operation.
The dissected foam was covered with a thin layer of soft polyether foam, which in
turn was covered with a polypropylene skin (see Fig. 24).
Wind tunnel experiments with the 'smart' rotor are scheduled for Fall 2009.
Figure 23: Photo of the fi nished scaled 'smart' rotor blade with two actuator slots
in the tip.
Figure 24: Design of the enhanced actuator for the rotating experiments with the
'smart' rotor.
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