Walking patterns of spiders, crabs inspire robot locomotion

March 27th, 2011 - 1:52 pm ICT by ANI  

London, Mar 27 (ANI): European researchers have said that the walking patterns of crabs, lobsters and spiders walk are helping to inspire novel ways to get robots moving around.

Closer study of the neural networks controlling the legs of invertebrates has revealed the rhythmic nerve impulses that govern gait. These have been adapted into modular control elements that can be transferred into robots to help mimic natural movement.

Researchers have already put the control systems into a robot worm.

Fernando Herrero, one of the Spanish researchers, said that the rhythmic impulses are known as central pattern generators (CPGs), and are among the best known of all neural circuits.

CPGs allow the body to automate certain repetitive tasks, such as chewing or walking. Although the activity requires some initial input to get started, the repetitive motion effectively runs on autopilot.

One reason that CPGs are so well understood is that the relative simplicity of invertebrate neural systems, compared with those of mammals, makes it much easier to map how their nerves interconnect.

This access, said Herrero, has allowed researchers to understand the ways in which CPGs generate the rhythmic impulses that help a spider or crab scuttle around.

Research is also allowing the impulses and rhythms to be recorded and used to generate control sequences for a robot’s artificial limbs.

Traditionally, said Herrero, robot makers get their creations moving by defining a series of rules that dictates what the legs of that machine should do to get about.

“CPGs autonomously generate rhythms without specifying any rule and thus can deal better with unexpected situations,” the BBC quoted him as saying.

The research has been described in the journal Bioinspiration and Biomimetics. (ANI)

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