Angular observation of joints of geckos moving on horizontal and vertical surfaces

Nov 19, 2008

New research shows that gecko's joints rotated more quickly the greater the speed, and the swinging scope of forelimbs stayed nearly at 59 degrees when swinging forward. The lifting angle of forelimbs was always positive to keep the center of mass close to the surface when moving up vertical surfaces. Alternative gaits had little effect on the swing angle of hind limbs of the geckos moving on both horizontal and vertical surfaces.

Scholars in the Institute of Bio-inspired Structure and Surface Engineering (IBSS), Nanjing University of Aeronautics and Astronautics (NUAA) used a three-dimensional locomotion video-recording and measuring system to observe and measure the angular rotation of joints in gecko's limbs when they were running on horizontal floor and climbing on vertical wall. This work helps us to understand gecko's locomotion from the view point of angle change of joints and to provide a direct reference to plan the gait of gecko-robots.

This research was published in Chinese Science Bulletin, Volume 53, Issue 22, 2008 and was performed by Li Hongkai, Dai Zhendong, Shi Aiju, Zhang Hao, Sun Jiurong.

Geckos have excellent locomotion abilities to move on various surfaces. The ability is highly desired by the robot moving in unstructured environments, especially legged robots. But the stability, agility, robustness, environmental adaptability, and energy efficiency of modern robots lag far behind that of correspondent animals. This research provides an insight into how geckos coordinate the joint angles on limbs and meet the requirements of moving on various surfaces.

The angular observation was performed to describe the difference between the locomotion on horizontal and vertical surfaces. The data collected from huge video recording and long vapid processing reveal the spatio-temporal rotation trajectory, extrema, ranges of each joint in forelimb and hind limb, the phase diagram of limb angles. Results of the experiments provide a direct intuitionistic presentation about the gait of gecko moving on horizontal and vertical surfaces with different speed.

Source: Science in China Press

Explore further: Restored streams take 25 years or longer to recover

Related Stories

Analyzing ocean mixing reveals insight on climate

Jun 24, 2015

Scientists at Los Alamos National Laboratory have developed a computer model that clarifies the complex processes driving ocean mixing in the vast eddies that swirl across hundreds of miles of open ocean.

Inventor Jake Dyson has LED light with cooling solution

Jun 10, 2015

Jake Dyson, son of Dyson founder James, has staked out his corner in the engineering innovation world with a focus on LED solutions, the Jake Dyson Light. He has in turn been doing a rethink on the characteristics ...

Sudden draining of glacial lakes explained

Jun 03, 2015

In 2008 scientists from Woods Hole Oceanographic Institution (WHOI) and the University of Washington documented for the first time how the icy bottoms of lakes atop the Greenland Ice Sheet can crack open ...

A folding drone that's ready for takeoff in a snap

May 20, 2015

Thanks to the power of its rotors, this fold-up quadrotor extends its articulated arms and takes off in a fraction of a second. This prototype will be viewed by specialists on May 25 at the International ...

Mapping lunar landscapes in panorama

May 15, 2015

The Camera Pointing System (CPS) is a sophisticated tool capable of controlling a camera's movement with precision as well as protecting the camera under extreme conditions.

Recommended for you

Restored streams take 25 years or longer to recover

just added

New research has found that the number of plant species growing just next to restored streams can take up to 25 years to increase above those channelized during the timber floating era. This is according ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.