For these applications, a collision device is
mounted on the base sled, accommodating a
honeycomb to be provided by the customer,
which serves as impactor for the penetration test.
Additional masses can be mounted on the sled for
making up the desired total mass. This sled is
accelerated to the desired speed
by the actuator of the catapult rig
A second sled carries the structure-undergoing test
and is positioned on the guideway with its brakes
applied (with a braking pressure of around 140
bar). The test allows penetration depths (specimen
deformation) up to 700 mm. For measurement
purposes the test specimen (i.e. the door
structure) and the dummy,
which is mounted on a seat, are equipped
with acceleration sensors.
The velocity of the impacting sled can be chosen
at random up to a maximum velocity of 60 km/h.
The sled changing station enables convenient
changeover from one sled to the next, in
applications where multiple sleds are used for a
variety of applications.
Side Impact Simulation
The side impact simulation system developed by
IST with servo-hydraulically controlled sled brake
enables the simulation of the acceleration time
histories of side impacts without the sled losing
contact with the catapult piston of the catapult
Low Speed Rear End
For this application IST is offering a simulation
package enabling highest signal reproduction
accuracy, even with low accelerations. On the
hydraulics side, a servo block with electrically
controlled changeover module is mounted on the
driver cylinder of the four-stage servo valve. The
servo block carries two-servo valve combinations
that are activated automatically depending on the
test selected on the test PC (low speed rear,
frontal/rear end crash, side impact or pitching
test). At the same time all system parameters
associated with this test type are loaded.
This application simulates the pitching
movement of the vehicle during a frontal crash.
Up until now, the simulation o