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PhD thesis content presentation
Transcript of PhD thesis content presentation
Modelling of Static and Dynamic Behaviour
what parameters influence actuators' behaviour under static and dynamic operating condition?
Static Study: Experimental Results vs Models
Dynamic Study: Experimental Results vs Models
Experimental vs Models
Dynamic Model + PZT properties (dynamic conditions)
Static Model + PZT properties (static conditions)
Models: non-standard PZT properties
Models: Standard PZT properties
Experimental Results: no permanent displacement offset
Parameters influence an actuator's static performance:
1. The first parameter is its permanent displacement offset
2. The second parameter is its nonlinear response at high voltages
3. The third parameter is its linear response at low voltages
1. Actuator's displacements has a direct relationship to the bending coefficient (defined in this thesis)
2. Actuator's resonance frequency has a direct relationship to the "reduced bending stiffness" (defined in this thesis)
3. Reduction of piezoelectric material's compliance depends on actuator layup and it depends on internal stress inside a piezoelectric material.
4. Reduction of piezoelectric coefficient depends on internal stress inside a piezoelectric material.
Static: 3 parameters influence actuator's performance
displacement offsets, nonlinear response, linear response
piezoelectric material properties change in response to electric field and frequency
actuator's stiffness plays important role in displacement and resonance frequencies.
large bending coefficient --> large displacement
stiff actuator --> large resonance frequency