centripetal/mechanical governors by aaron zhou id#: 20193983 objective: to convey an understanding...
TRANSCRIPT
Centripetal/Mechanical Governors
By Aaron ZhouID#: 20193983
Objective: To convey an understanding of the basic concept of centripetal governors
What Is It?
• A centripetal governor is a mechanical feedback device for maintaining a particular revolution rate of a machine.
“Negative feedback is a type of feedback, during which a system responds so as to reverse the direction of change. Since this
process tends to keep things constant, it is stabilize and attempts to maintain homeostasis. When a change of variable occurs within a stable negative feedback control system, the system will attempt
to establish equilibrium” - www.wikipedia.org
• Common applications…
• Extends life, gives engine a load, prevents overspeeding and engine failure.
James Watt (1736-1819)
Picture taken from http://www.katharinen.ingolstadt.de/physiker/watt.gif
• Scottish engineer and inventor
• Interest in steam engines
• Work on steam engines and improvements to older models at University of Glasgow
• The Watt Governor
How It Works
•Governor uses 2 methods
-Butterfly valve
-Totally fuel air mixture cut-off
•Maintain a near constant speed whatever the load or fuel supply conditions
Picture taken from :
http://en.wikipedia.org/wiki/Linkage_(mechanical)
Demonstation
•System at rest
•Begins to rotate•Governor at work
•Equilibrium established
Pictures taken from:
www.physics.montana.edu/ demonstrations/video/...
DissectionWhy Is It Made Of Plastic?• Metal is a conductor, cuts magnetic flux of the materials within engine
• Metals prone to creep and crack propagation
•Absorbs shock from engine resonant vibrations
References
• www.wikipedia.org• www.howstuffworks.com• http://www.absoluteastronomy.com/
encyclopedia/c/ce/centrifugal_force.htm