II. How To Use ATILA

5.1 L-Shape USM (3)
PROBLEM TYPE VIEW RESULTS


PROBLEM - L-Shape USM

2 Legs: 8 mm L x 2 mm W x 1 mm t
Corner: 2 mm x 2 mm x 1 mm t (PZT4)
Clamped at two leg ends

 


  • Learn the ultrasonic motor principle - Generate an elliptical locus
  • Learn how to apply sine & cosine voltages simultaneously

PROBLEM TYPE

Data -> Problem data -> 3D, Harmonic, Click both Compute Stress and Include Losses

FREQUENCY

Data -> Harmonic -> Interval 2 (35000-100000 Hz)

CALCULATION

Calculate -> Calculate window -> Start

POST PROCESS/VIEW RESULTS

Click for Opening the Post Calculation (Flavia) Domain
Click Admittance/Impedance Result
Admittance Peak Points : 61000 Hz and 825 Hz -> This peak corresponds to the First and Second Resonance Modes
Admittance Curve
View Animation - Vibration Mode at a Particular Frequency
View results -> Default Analysis/Step -> Harmonic-Magnitude -> Set a Frequency
(Peak Point : 41000 Hz for Resonance Mode)
Double Click Loading frequency: 61000 Hz Harmonic Case -> Click OK (Single Click and Wait for a while!)
Set Deformation -> Displacement
View results -> Deformation -> Displacement
Other parameter than Displacement
Set Results View -> View results -> Contour Fill -> Electric Potential or Von Mises Stress
After setting both “Results view” and “Deformation” -> Click to see the Animation
61000 Hz - Resonance
82500 Hz - Resonance

When we drive this actuator at the intermediate frequency of these two resonances (70 kHz), we obtain the superposed elliptical locus at the tip. This is used as a linear ultrasonic motors

70000 Hz - Resonance