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(a) Perspective view of our system—W: wing, E: elastomer, Ma: additional mass, S: support, U: wind; (b) lateral view—PA: point of attack of elastomer, CM: centre of mass, LE: leading edge; (c) typical time behaviour of CM coordinates (xCM : black circles, yCM : black triangles) and α (open circles).
Series of images taken from different movies. The time separation between images is 0.025 s. Two white stripes mark the end of the wing. The cartoons illustrate the position of CM (square) and PA (circle) (enhanced online). [URL: http://dx.doi.org/10.1063/1.4729936.1] [URL: http://dx.doi.org/10.1063/1.4729936.2] [URL: http://dx.doi.org/10.1063/1.4729936.3] [URL: http://dx.doi.org/10.1063/1.4729936.4]10.1063/1.4729936.110.1063/1.4729936.210.1063/1.4729936.310.1063/1.4729936.4
Different regions in the parameter space PA–CM. The insets report the centre of mass trajectory for selected configurations.
Left: CM trajectory experimental (cross) and calculated by 2D simulation (circle); Right: simulated (continuous line) and experimental (dotted line) angular displacement. In this configuration PA = 0.15 and CM = 0.15.
Oscilloscope trace of the acquired signal.
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