Home > News > 'Negative stiffness' used to damp vibrations
April 19th, 2007
'Negative stiffness' used to damp vibrations
Angstrom-level accuracy is needed to stabilize platforms used in applications like microelectromechanical system testing, nanoscale metrology and semiconductor fabrication tools. One company is developing products based on a mechanism called negative stiffness to cancel vibrations.
"The U.S. Air Force couldn't find a place quiet enough to test their next-generation acceleratometers and gyros," said David Platus, CEO of Minus K Technology Inc. (Inglewood, Calif.). "That got me thinking about a negative stiffness mechanism to cancel out vibrations."
Since the 1960s, the best way to isolate precise instruments like atomic-force and scanning-tunneling microscopes along with fab tools from vibration was passive air tables that support weight on a cushion of air. A recent alternative is using active electronic feedback to send cancelling forces that damp out oscillations in springs.
Researchers create vaccine for dust-mite allergies Main Page Content: Vaccine reduced lung inflammation to allergens in lab and animal tests July 22nd, 2014
Organometallics welcomes new editor-in-chief: Paul Chirik, Ph.D. July 22nd, 2014
NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014
Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014
EPFL Research on the use of AFM based nanoscale IR spectroscopy for the study of single amyloid molecules wins poster competition at Swiss Physics Society meeting July 22nd, 2014
The Hiden EQP Plasma Diagnostic with on-board MCA July 22nd, 2014
Nanometrics Announces Upcoming Investor Events July 22nd, 2014
Bruker Awarded Fourth PeakForce Tapping Patent: AFM Mode Uniquely Combines Highest Resolution Imaging and Material Property Mapping July 22nd, 2014