Environmental Engineering Reference
In-Depth Information
Fig. 13.3
Experimental
setup
Figure
13.3
shows the overall experimental setup, whereas Fig.
13.4
includes a
detail of the base to better understand how the smart base restraint has been
realized. Such figures also report the type and position of all the transducers
adopted, whereas further details are given in the following sections. Some pho-
tographs of the setup are given in Fig.
13.5
.
13.3.1 Electronic Equipment and Transducers
The electronic equipment adopted for the experimental activity on the wind tur-
bine model can be formally distinguished into two parts: conventional tools for
structural laboratory tests and an extra-equipment properly required for SA control
by means of two MR dampers.
The position of the transducers belonging to the first group is shown in
Figs.
13.3
and
13.4
. The horizontal displacements of the shaking table were
measured through a laser transducer supported by a steel stick (WayCon laser,
model LAS-T-500, range of measure 50-550 mm). The same kind of laser
transducer was located at 2/3 of total height of the tower and fixed to an external
wood stick to measure the absolute horizontal displacement of that section. The
axial displacements of springs were measured by a third laser transducer attached
on the steel plate where one of the 2 springs (the one closer to the actuator) is
installed (WayCon laser, model LAS-T-250, range of measure 50-300 mm).
Rotation of the base and axial displacements of MR dampers have been calculated
