HOME >> BIOLOGY >> NEWS
Tomorrow's super robots may owe their mobility to a cockroachs legs today

hysiological Society (APS) August 24-28, 2002 at the Town & Country Hotel, San Diego, CA. To learn more about the conference and presentations, go to: http://www.the-aps.org/meetings/aps/san_diego/home.htm

Methodology

Relaxation and dynamic experiments were carried out on the hind leg of Blaberus discoidalis to aid in the selection of a material behavior model and to quantify measures of roach leg response. During testing, the coxa of the ablated metathoracic limb (hind limb) of the cockroach was epoxied to 3/8" acrylic such that the coxa-femur and femur-tibia joints were free to rotate. Cyanoacrylate was used to attach one end of a stainless steel pin to the distal tip of the tibia; dental impression compound was used to adhere the other end of the pin to the arm of a servo-motor system. The leg was then displaced with the Aurora system, which is based upon a high performance rotary moving coil motor supported by precision ball bearings. The results are that the total error in the force-displacement measurements to be less than four percent that of a viscoelastic solid.

Results

The results indicate that a cockroach leg excited in a direction orthogonal to the joint direction behaves similarly to a viscoelastic material. The exponential nature of the force relaxation curves suggests viscoelasticity. The hysteretic nature of the force-displacement curves indicates that there is energy loss due to the internal friction, which is a common characteristic for viscoelastic materials. The cockroach leg is subject to a combination of bending and torsion in the experiment. The overall effect can be modeled as a torsion spring with a moment arm. Additional assumptions for the model include: (1) the axis of rotation for the leg is constant during torsion and (2) the joint material can be approximated using a lumped-parameter element with uniformly distributed linear viscoelastic p
'"/>

Contact: Donna Krupa
djkrupa1@aol.com
703-967-2751
American Physiological Society
26-Aug-2002


Page: 1 2 3 4 5

Related biology news :

1. Sandia Decontamination Foam May Be Tomorrows Best First Response In A Chem-Bio Attack
2. Gene chips research in cotton could lead to superior variety
3. Flame retardants found on supermarket shelves
4. UCSD biologists develop super-endurance strain of mice
5. Birds show superior listening skills
6. Scientists question reports of massive ant supercolonies in California and Europe
7. Knock out rose receives Texas superstar and earthkind designation
8. Frog skin and supercomputers lead Penn chemists to designing better bacteria killers
9. A possible new form of supersolid matter
10. St. Jude ranked among top 500 supercomputer centers
11. Gene mutation leads to super-virulent strain of TB

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/28/2017)... PUNE, India , March 28, 2017 ... (Analog, IP, Biometrics), Hardware (Camera, Monitors, Servers, Storage Devices), ... Maintenance), Vertical, and Region - Global Forecast to 2022", ... 30.37 Billion in 2016 and is projected to reach ... 15.4% between 2017 and 2022. The base year considered ...
(Date:3/23/2017)... March 23, 2017 The report "Gesture Recognition and Touchless ... and Geography - Global Forecast to 2022", published by MarketsandMarkets, the market is ... of 29.63% between 2017 and 2022. Continue Reading ... ... ...
(Date:3/22/2017)... Vigilant Solutions , a vehicle location ... announced today the appointment of retired FBI special agent ... business development. Mr. Sheridan brings more than ... focus on the aviation transportation sector, to his new ... Sheridan served as the Aviation Liaison Agent Coordinator (ALAC) ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... 2017 , ... A recent survey conducted by the Weed Science Society of ... in 12 categories of broadleaf crops, fruits and vegetables, while common lambsquarters ranks as ... Canada participated in the 2016 survey, the second conducted by WSSA. A 2015 ...
(Date:5/23/2017)... ... May 23, 2017 , ... Genedata, ... 20th anniversary, marking the occasion with a strong presence at Bio-IT World Conference ... and further extends an invitation to all attendees to view posters on ...
(Date:5/23/2017)... ... May 22, 2017 , ... ... 2017 in San Diego, California, this August will feature high-level speakers on ... autonomous vehicles. , SPIE Optics and Photonics, the largest multidisciplinary optical sciences meeting ...
(Date:5/23/2017)... ... May 23, 2017 , ... Energetiq Technology, a world ... facility expansion to accommodate its rapid growth. , The renovations at the company’s ... of the existing areas. The expansion includes, a state-of-the-art engineering facility, and a ...
Breaking Biology Technology:
Cached News: