Meemee Chu Joanna Ortiz Sevanne Calle Wilbaldo Acevedo...
28
Meemee Chu Joanna Ortiz Sevanne Calle Wilbaldo Acevedo Mentor: Lily Li Advisor: Professor Kimberly Turner
Transcript of Meemee Chu Joanna Ortiz Sevanne Calle Wilbaldo Acevedo...
Meemee Chu Joanna Ortiz Sevanne Calle
Wilbaldo Acevedo
Mentor: Lily Li Advisor: Professor Kimberly Turner
Micro-cantilevers are oscillators
Microcantilever
1/5 mm
𝜔𝑛 =𝑘𝑚
Natural frequency of a mechanical oscillator
𝜔𝑛 Frequency
Ampl
itude
𝜔′𝑛 =𝑘
(𝑚 + ∆𝑚) 𝜔𝑛 =
𝑘𝑚
Microcantilever
o Study idealized model
o Learning the mechanical properties of a micro-cantilever
200 μm
450x20x2 μm
o Using MATLAB to analyze data
Computer
Computer
Function Generator
Computer
Function Generator
Device
Piezoelectric material
Microscope
Computer
Function Generator
Device
Piezoelectric material
Microscope
Laser Vibrometer
Computer
Function Generator
Device
Piezoelectric material
Microscope
Laser Vibrometer
Computer
Function Generator
Device
Piezoelectric material
Microscope
Laser Vibrometer Spectrum
Analyzer
Computer
Function Generator
Device
Piezoelectric material
Linear Response of the System
V
Power vs. Frequency
Linear and Nonlinear Response
V
Power vs. Frequency
Linear Response
1 V
Power vs. Frequency
Nonlinear Response
10 V
Power vs. Frequency
Results
The harder the driving force the larger the amplitude response
Results
A maximum driving force exists around 3V to maintain a linear response Power vs. Frequency
Results
Hysteresis exist for nonlinear response Power vs. Frequency
Oscillating into our Future Further the studying of the micro-cantilever system
and its coating material Ultimately improving and obtaining new technology
𝜔′𝑛 =𝑘
(𝑚 + ∆𝑚)
Frequency Shift with added mass
Thank You
Mentor Lily Li Professor Turner Faculty and Peers Resident Assistants
Jack Kent Cooke Foundation YOU!
Success and Difficulties
This week… we learned The mechanical properties of oscillators The experiment set up Matlab and Comsol
