Giant dragonfly, jellyfish make waves

Festo, a manufacturer of pneumatic and electromechanical systems, components and controls for automation, had an attention-grabbing giant dragonfly and jellyfish on display at the Pack Expo in Chicago. See the video to watch the dragonfly in flight!

11/20/2014


Giant dragonflies, 290 million years ago, had a similar wingspan, just over 2 ft (63 cm). This Festo Bionic dragonfly was 90% 3D printed. It weighs about 6.2 oz (175 g) including 8 servo motors, one for flapping and one for direction on each of the four wFesto, a manufacturer of pneumatic and electromechanical systems, components and controls for automation, displayed an attention-grabbing giant dragonfly and jellyfish. The dragonfly uses the Festo BionicOpter design, an ultra-lightweight flying object that can fly in all directions and perform complex in-flight maneuvers. The BionicOpter can move each of its four wings independently, which allows it to mimic the movement and flight of a helicopter, plane, and glider. It can even fly backwards.

3D printed components

This unique way of flying is made possible by the ultra-lightweight construction (some 90% of the dragonfly is 3D printed) and the integration of components such as sensors, actuators, and mechanical components. (See photo caption for more information.) Furthermore, open- and closed-loop control systems are installed in a tiny space and adapted to one another. The flapping frequency, amplitude, and angle of incidence are controlled by software and electronics.

Mechanics of flying

The principles of ultra-lightweight construction are applied throughout the flying object. With a wingspan of just over 2 ft (63 cm) and a body length of 44 cm, the model dragonfly weighs just 6.2 oz (175 g). The wings consist of a carbon-fiber frame with a thin foil covering. Intelligent kinematics corrects any vibrations during flight and ensures flight stability. To stabilize the flying object, data on the position and the twisting of the wings is continuously recorded and evaluated in real time while in flight. 

Into the sea

AquaJelly is the other mechanical creature that was demonstrated in a large water tank in the booth. Instead of flying this jellyfish swims and swarms. It has eight tentacles and housed in the center of its watertight laser-sintered body is an electric motor powered by two lithium-ion batteries.

Festo doesn't offer the remote-controlled dragon from or autonomous robotic jellyfish for sale, but hopes to learn from the engineering used, and apply those technologies to its commercially available products. A gripper demonstrated with a robotic elephant trunk (shown previously) is available for sale, for instance.

- Edited by Eric R. Eissler, associate editor, CFE Media, Control Engineering, eeissler@cfemedia.com.

ONLINE

www.festo.com/bionic

ONLINE extra

See related Festo bionic developments including a kangaroo and bird and other product developments at Pack Expo 2014 in Chicago.

Festo is a CSIA member as of 3/5/2015



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