Europe South Asia Asia Pacific Americas Middle East Africa BBC Homepage World Service Education

Front Page



UK Politics







Talking Point

In Depth

On Air

Low Graphics

Monday, June 28, 1999 Published at 07:30 GMT 08:30 UK


Muscular robots planned for Mars

The recent Pathfinder Mars explorer was restricted by wheels

Robots with legs powered by artificial muscles are being developed to explore Mars.

Professor Kumar Ramohalli of the University of Arizona: Robots based on animals and humans
A prototype of the machine - called a Birod (Biomorphic Robot with Distributed power) - has been built at the University of Arizona.

It moves using wires and springs which contract like muscles when electricity is passed through them.

The Birods would be able to move across terrain restrictive to wheeled robots, and carry up to 17,000 times their own weight.

Four legs good

The prototype is a box supported by two legs with stabilising wheels at the back. The working models, however, would have four legs to enable them to step over obstacles.

Professor Kumar Ramohalli, head of the Birod programme, said: "We are trying to imitate biological systems.

"Birods are much simpler than robots you have seen in the past."

The lack of complex machinery makes the Birod light and reliable - ideal for space missions. They are also less likely to have their workings damaged by dust, and take up less space and payload weight on spacecraft.

Cat-like machine

Prof Ramohalli said: "Everything doesn't depend on central control, so if one leg stops working everything doesn't jam up and freeze. Birods can limp along on the other legs."

The Birod would be able to take "cat naps", the professor said, able to rest and regain energy before springing to life when action was called for.

"Robots with this kind of capability can hop over an obstacle, turn over a rock, or crush a mineral sample. These are things that today's robots can't do."

Advanced options | Search tips

Back to top | BBC News Home | BBC Homepage | ©

Sci/Tech Contents

Relevant Stories

27 May 99 | Sci/Tech
Mars in sharper focus

17 Feb 99 | Sci/Tech
Robot fire fighter unveiled

18 Jun 98 | Sci/Tech
Mars in 3D

11 Mar 98 | Sci/Tech
Nasa kisses Pathfinder goodbye

Internet Links


NASA Marsweb

Mars Pathfinder

University of Arizona

The BBC is not responsible for the content of external internet sites.

In this section

World's smallest transistor

Scientists join forces to study Arctic ozone

Mathematicians crack big puzzle

From Business
The growing threat of internet fraud

Who watches the pilots?

From Health
Cold 'cure' comes one step closer