Science

Caterpillar robots may transport loads in future

Press Trust of India London | Updated on January 17, 2018 Published on August 21, 2016

Scientists develop an automaton that can climb slopes, squeeze through narrow slits

Scientists have developed a tiny bio-inspired soft robot capable of mimicking caterpillar gaits in natural scale, that can climb slopes, squeeze through narrow slits and transport loads.

The 15-millimetre long soft robot harvests energy from green light and is controlled by spatially modulated laser beam.

Researchers at the University of Warsaw in Poland used liquid crystal elastomer technology to develop the robot.

For decades scientists have been trying to build robots mimicking different modes of locomotion found in nature. Most of these designs have rigid skeletons and joints driven by electric or pneumatic actuators.

Previous attempts

However, a vast number of creatures navigate their habitats using soft bodies. Earthworms, snails and larval insects can effectively move in complex environments using different strategies.

Previous attempts to create soft robots were limited to larger scale (typically tens of centimetres), mainly due to difficulties in power management and remote control.

Liquid crystalline elastomers (LCEs) are smart materials that can exhibit large shape change under illumination with visible light.

With the recently developed techniques, it is possible to pattern these soft materials into arbitrary three dimensional forms with a pre-defined actuation performance.

The light-induced deformation allows a monolithic LCE structure to perform complex actions without numerous discrete actuators. Researchers, including those from European Laboratory for Non-Linear Spectroscopy (LENS) in Italy and Cambridge University (UK), developed a natural-scale soft caterpillar robot with an opto-mechanical liquid crystalline elastomer monolithic design.

Published on August 21, 2016
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