Hi,

Try the following reference

An angle-based design approach for rectangular electrostatic torsion
actuators
Xiao, Z.; Wu, X.-T.; Peng, W.; Farmer, K.R.;
Microelectromechanical Systems, Journal of , Volume: 10 Issue: 4 , Dec 2001
Page(s): 561 -568

and try to contact the author for further information at xiao@adm.njit.edu

Regards

Ofir

-----Original Message-----
From: mems-talk-bounces+ofird=tx.technion.ac.il@memsnet.org
[mailto:mems-talk-bounces+ofird=tx.technion.ac.il@memsnet.org]On Behalf Of
sou zou
Sent: Monday, March 31, 2003 6:16 PM
To: mems-talk@memsnet.org
Subject: [mems-talk] torsioanal springs ?



Hi folks,

Looking for some torsional spring shapes to rotate some mirrors. In fact,
the only ideas in hand are related either to the thin straight beams or
folded springs (meanders). they are probably the only choices, but i didn't
find any technical documentation to optimise the folded spring (size, number
of meanders, eigenfrequency), which obviously would save a lot of time
rather than running FEM packages... Any advices would be greatly appreciated
fellas. By the way, I heard about roark's digitised formulas, does anyone
have them or could tell me if we could rely on them and under which
conditions...

Many thanks in anticipation

Sofiane



---------------------------------
Do You Yahoo!? -- Une adresse @yahoo.fr gratuite et en français !
Testez le nouveau Yahoo! Mail
_______________________________________________
MEMS-talk@memsnet.org mailing list: to unsubscribe or change your list
options, visit http://mail.mems-exchange.org/mailman/listinfo/mems-talk
Hosted by the MEMS Exchange, providers of MEMS processing services.
Visit us at http://www.memsnet.org/