This paper presents a trailing edge flap actuation mechanism using a novel pre-stressed piezoelectric unimorph, PUMPS
(Piezoelectric Unimorph with Mechanically Pre-stressed Substrate). Experimental evaluation of actuation performance
such as force-displacement characteristics of PUMPS actuators showed that the performance of PUMPS satisfied the
requirements for trailing edge flap actuation. Subsequently, flap actuation mechanisms were designed and constructed
with several slot types in the flaps, and stacked PUMPS actuators were applied to the flap actuation mechanisms.
Experimental study of the test wing models with four flaps was accomplished, and the flap angle was achieved up to
±5.5° within 15Hz under maximum applicable voltage.
A possible approach to meet the increasing performance requirements of lightweight structures in various engineering
fields is the application of smart structures. One of the functions, which are required, is the observation of the structures'
shape. During operation, however, the monitoring of displacement fields is difficult. This paper discusses the
displacement field estimation of a dynamically excited plate using fiber Bragg grating strain sensors. Using a modal
approach, it is possible to derive a transformation matrix to estimate the displacement field using only a few strain
measurements. To reduce systematic estimation errors due to residual modes, a parameter study was performed and the
sensor location optimized using the condition number of the transformation matrix as an objective function. An
experiment with an optimized sensor configuration including 16 fiber Bragg grating strain sensors was performed to
verify the method and the simulation results.