1. ENSC 494 Design of a Micro-Machined Bistable Switch Group MISS: Maria Trinh Ian Foulds Sam Hu Steve Liao

2. Introduction Bistable Switch A mechanical device that provides two stable states with a single actuation State 2State 1 State 2 Actuation

3. Motivation Needed for: Optical Switching Micro-Transmission Current Solution : Monostable Switches High Power Consumption Heat Dissipation

4. Inspiration Extension Ladder Simple Linear Actuation Implements well MUMPs in technology

5. Implementation Cantilever Beams Hook Step Actuator Rod Pull Rail Guide

6. Animations

7. Calculations F Beam Bending Dynamics –model: cantilever beam with end load –box spring:

8. Design Details A B C D E F G H I J K L M

9. Final Design

10. Future Research F 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

11. Questions? F Check out the website: F http://www.sfu.ca/~shua