|
PC-9 Deformation Analysis - DSTO
Photogrammetry was used used to perform a complex deformation measurement
of an entire PC-9 Aircraft. The work formed part of a 'Fatigue Test Simulator'
that simulates real flight scenarios. The array of actuators connected
to the aircraft simulate real flying conditions on the airframe. This
process allows DSTO to safely take the aircraft to, and beyond, its operational
limits. The airframe is routinely stripped down and assessed for damage
such as fatigue and cracking. This allows DSTO to isolate and combat problems
in the PC-9 well before they occur in the aircraft.
The measurement goal was to accurately quantify
the movement occurring in the airframe for a series of flight loadings.
The airframe was measured in 8 different states ranging from zero load
to maximum g loading using the V-STARS
S-System
For each state, a complex network of 100 images
determined the XYZ coordinates of 280 points to better then 0.15mm.
The measurement data was used to refine DSTO's
simulation models. Particular interest was paid to the amount of twist
occurring in the fuselage under a high g roll manoeuvre. As the airframe
ages the amount of fuselage twist increases.
|
