Negative-stiffness vibration isolation
A new kind of vibration isolator, which is base on negative-stiffness theory, is made out for nano manufacture. In this paper, vibration isolation theory is mentioned to further explain negative-stiffness, and then Euler Columns and another negative-stiffness structure are introduced. Furthermore, the stiffness expression is figured out. Finally, a negative-stiffness vibration isolator is made to prove the theory and experiments also shows that its nature frequency is 0.45Hz and can isolate 79% of vibration at 1.9Hz and 97% at 4.9 Hz.
Negative-stiffness vibration isolation improves reliability of nanoinstrumentation
Although low-frequency vibration isolation can be achieved by suspending nanoinstrumentation from a ceiling or using air tables, passive negative-stiffness vibration-isolation systems have become an economical choice for nanotechnology applications.
Negative-stiffness-mechanism vibration isolation systems
Negative-Stiffness-Mechanism (NSM) vibration isolation system offer a unique passive approach for achieving low vibration environments and isolation against sub-Hertz vibrations. 'Snap-through' or 'over-center' NSM devices are used to reduce the stiffness of elastic suspensions and create compact six-degree-of-freedom systems with low natural frequencies.