Transcript ENSC 494 Design of a Micro-Machined Bistable Switch Group MISS: M

ENSC 494
Design of a Micro-Machined Bistable Switch
Group MISS:
Maria Trinh
Ian Foulds
Sam Hu
Steve Liao
Introduction
Bistable Switch
•A mechanical device that provides two stable
states with a single actuation
State 1
State 1
State 2
Actuation
State 2
Motivation
Needed for:
•Optical Switching
•Micro-Transmission
Current Solution:
•Monostable Switches
•High Power Consumption
•Heat Dissipation
Inspiration
Extension Ladder
• Simple
• Linear Actuation
• Implements well MUMPs in technology
Implementation
Step
Rail
Guide
Hook
Actuator
Rod
Cantilever
Beams
Pull
Animations
Calculations
 Beam
Bending Dynamics
– model: cantilever beam with end load
w  h3
I 
12
– box spring:
K
96  E  I
N  L3
Design Details
A
B
C
D
K
F
H
G
E
I
J
M
L
A
12.00
B
36.00
C
50.00
D
82.00
E
120.00
F
2.00
H
49.00
I
30.00
J
70.00
K
86.00
L
120.00
M
2.00
G
75.00
Final Design
Future Research
 Shrink
–
–
–
–
–
–
design:
develop smaller hub and hook
look into torsional springs
aim for shorter actuation trajectory
eliminate the need for stepper motors
simplify design
lower energy consumption
Questions?
 Check
out the website:
 http://www.sfu.ca/~shua