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June 21, 2000 2000 ASEE Annnual Conference
A Technology Approach to Magnetic Levitation
Steven Barker and Ron Matusiak
Buffalo State College
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June 21, 2000 2000 ASEE Annnual Conference
Presentation Outline
Introduction to Buffalo & EET Program at BSC Why Maglev AGAIN? Maglev Summary in Pictures Critical Components Maglev Tuning - ET Approach Control Systems II Course -
Centered around the Maglev project Other Diagrams of Possible Interest
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June 21, 2000 2000 ASEE Annnual Conference
Introduction to Buffalo, Local Industry, Education, Engineering Technology
Buffalo Population: city ~0.3M, region ~1M Industry: automotive, chemical, food, aerospace,
computer support, numerious small manufacturing Education: 4 CCs, 15 colleges, 4 universities, 2
commercial colleges Buffalo State College: Engineering Technology,
Diversity, Control Systems Outstanding Lab Technician
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June 21, 2000 2000 ASEE Annnual Conference
Why Maglev AGAIN?
Demonstration for control system courses Desire to share inexpensive design with others Project-centered Controls II course for EET Demonstration for college open house Demonstration for high school recruitment
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June 21, 2000 2000 ASEE Annnual Conference
Maglev Summary In Pictures
Hardware-Overview Picture Close-Up Picture (Ball, IR LED & Detector) Control-Circuit Picture Control-Circuit Diagram Component-List Table
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Por
tabl
e M
agle
v S
yste
m
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June 21, 2000 2000 ASEE Annnual ConferenceClose-Up View
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Control-Circuit Picture
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Control-Circuit Diagram
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Com
pone
nt-L
ist T
able
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June 21, 2000 2000 ASEE Annnual Conference
Critical Components
Electromagnet Derivative gain Short leads 10k Hz sensor signal isolation Diode across the electromagnet
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June 21, 2000 2000 ASEE Annnual Conference
Maglev Tuning - ET Approach
Sanity Check: voltage_D & air gap & current_I Derivative gain (K_D): turn off Proportional gain (K_P): Increase Until ... K_D: Increase slowly (May also have to
simultaneously trim K_P.) Air gap: about 1/2 cm Electromagnet current: about 300 ma.
Did not overheat. Ambient light still has some effect.
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June 21, 2000 2000 ASEE Annnual Conference
Control Systems II Centered Around The Maglev Project
Lectures on classical frequency responses - Bode Plots (3 weeks)
Students build, test, and tune the maglev system (4 weeks)
Students build MATLAB Simulink model of the maglev system (4 weeks)
Lectures on frequency response stability (3 weeks) Review and traditional final exam on frequency
responses (1 week).
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June 21, 2000 2000 ASEE Annnual Conference
Other Diagrams Of Possible Interest
A Student's Simulink Model Measuring Magnetic Force vs I and Z Frequency Response of the Derivative Block Measuring the Air Gap Digital Control Various Electromagnets Possible Laboratory Experiments
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Simulink Model
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Mea
suri
ng M
agne
tic
For
cevs
Cur
rent
and
Air
Gap
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June 21, 2000 2000 ASEE Annnual Conference
Mea
suri
ng th
e A
ir G
ap
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Fre
quen
cy R
espo
nse
of D
eriv
ativ
e B
lock
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Digital Control of Maglev System
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June 21, 2000 2000 ASEE Annnual Conference
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June 21, 2000 2000 ASEE Annnual Conference