Northwestern UniversityCompliant MechanismsME 381 Fall 2004 Compliant MechanismsCompliant Mechanisms Presented By: Ravi Agrawal, Binoy Shah,Ravi Agrawal, Binoy Shah, andand Eric ZimneyEric ZimneyNorthwestern UniversityCompliant MechanismsME 381 Fall 2004 OtlineOtline!"or#in$ %rincipal!&'vanta$es an' (isa'vanta$es!Compliance in MEM) 'evices!(esi$n an' Optimi*ation!&nalysis+ )tatic an' (ynamic!E,ample (evices!ConclsionNorthwestern UniversityCompliant MechanismsME 381 Fall 2004 "or#in$ %rinciple"or#in$ %rinciple!(e-lection o- -le,i.le mem.ers to store ener$y in the -orm o- strain ener$y !)train ener$y is same as elastic potential ener$y in in a sprin$!)ince pro'ct o- -orce an' 'isplacement is a constant/ 0here is tra'eo-- .etween -orce an' 'isplacement as shown in -i$ on le-t/ Compliant Mechanism: A flexible structure that elastically deforms without joints to produce a desired force or displacement. Northwestern UniversityCompliant MechanismsME 381 Fall 2004 Macro1scale E,amplesMacro1scale E,amplesNon-compliant crimp Non-compliant wiperCompliant crimp Compliant wiperNorthwestern UniversityCompliant MechanismsME 381 Fall 2004 2ene-its o- Compliant Mechanisms2ene-its o- Compliant Mechanisms&'vanta$es1/ No 3oints2/ No -riction or wear3/ Monolithic4/ No assem.ly4/ "or#s with pie*oelectric5 shape1memory alloy5 electro1thermal5 electrostatic5 -li' pressre5 an' electroma$netic actators(isa'vanta$es1/ )mall 'isplacements or -orces2/ 6imite' .y -ati$e5 hysteresis5 an' creep3/ (i--iclt to 'esi$nNorthwestern UniversityCompliant MechanismsME 381 Fall 2004 Compliance -or MEM)Compliance -or MEM)Featres 7mpactMonolithic an' %laner 1)ita.le -or micro-a.rication1No assem.ly 8a necessity -or MEM)91:e'ce' si*e1:e'ce' cost o- pro'ction3oint1less 1No -riction or wear1No l.rication nee'e')mall 'isplacements or -orces1 Use-l in achievin$ well controlle' -orce or motion at the micro scale/Compliant Actuator New designNon-Compliant Actuator - Old DesignNorthwestern UniversityCompliant MechanismsME 381 Fall 2004 (e-initions(e-initions!;eometric &'vanta$e+!Mechanical &'vanta$e+!6ocali*e'