Centre for Analysis,

Scientific computing

and Applications

http://www.casa.tue.nl

surface fitting

data analysis

laser drilling

iterative solvers

software subcontracting

structural analysis

Recent and Current Projects

Surface Fitting

fairing of ship surfaces

Surface Fitting

bicubic spline approximation

closeness of fit vs. smoothness of fit

Data Analysis

Data Analysis

Laser Drilling

Removal by evaporation and melt ejection

2αdross

barrelling

recast layer

spatter

tapering

Front-Tracking

pool depth

radial direction

10 pulses

Phase Transition

Laser Drilling

Iterative Solvers

• structural analysis

• finite element simulation

• ill-conditioned stiffness matrix

• 2.000.000+ degrees of freedom

• ICC(0) + CG-variant/MinRes

Structural Analysis

composite materials

XY robot

For given spectrum:

measured spectrum height, sidewall angle, midCD, BARC thickness

Find shape parameters:

Such that:

- 0

measured spectrumcomputed spectrum

STARS Project

Minimize cost function

Define initial shape

Compute spectrum

Compare with measured spectrum

Update shape parameters

STARS Project

30mins → 4 secs (speed-up factor 500)

0th diffraction efficiency (TM polarization)

φ (azimuth)

θ

STARS Project

STARS Project

subsampling?

spectrum TE spectrum TM