6-Inch Horizontal HYGETM system is designed to simulate
the effects of a collision in an acceleration rather than deceleration
mode. The 6-Inch Horizontal HYGETM system consists
of a thrust piston with an acceleration stroke of approximately
24” (0.61 m). The system is capable of producing a family
of acceleration wave forms with a nominal 40 ms rise time, using
a standard metering pin. It is capable of a variety of metering
pins that can produce a range of acceleration wave forms. This
system design provides extremely repeatable and reproducible acceleration
pulses, enabling accurate simulation and modeling of crash conditions
in non-destructive fashion. The system has proven its repeatability
over time. HYGETM systems over 40 years old routinely
demonstrate repeatability of better than +/- 2%.
The test specimen is mounted to a carriage that is approximately
30 inches (0.76 m) wide by 24 inches (0.6 m) long and weighs approximately
165 lb (75 kg). This is attached to a rail system ~40 feet (12
m) long that has a spacing of 24 inches (0.6 m). Pneumatic brakes
are mounted on the carriage. The maximum test specimen weight
is 1,000 lb (455 kg). Additional rail sections and different carriage
sizes are available.
The HYGETM system offers precise control of pulse
shape, excellent test repeatability and universal acceptance within
the automobile manufacturing community.
Systems are in use worldwide for a variety of automotive and
aircraft safety testing applications. Some typical applications
include the testing of components such as seats, seat belts, door
lathes, windshields, transmission, engine, fuel tank mounts, body
- Proven Accuracy capable of simulating actual crash pulses
to within +/-2%.
- Reproducibility pulses can be accurately reproduced.
- Versatility-- Can perform a variety of velocity and acceleration
- Mechanically Simple only 2 moving parts.
The 6-Inch Horizontal HYGETM system consists of four
- The Actuator, including Load and Set Cylinders and the Thrust
- The Rail System and Carriage.
- The Pneumatic System, which provides pressurized gas for firing
- The Control Center containing hardware to pressurize and fire
By changing to a different metering pin design, various pulse
shapes can be produced. Low speeds and accelerations can be achieved
The actuator consists of two stainless steel cylinders each with
a 6-inch bore. This is mounted to the face of a reinforced concrete
foundation block. Adding or removing adjusts the volume of the
Set Cylinder. The pulse control is done with a metering pin; the
purpose of the metering pin is to throttle the amount of energy
transferred to the carriage at any given time during firing, thereby
determining the shape of the acceleration pulse. A particular
component, in a particular crash situation, will have a waveform
determined by modeling or by actual crash tests. Each metering
pin is machined to produce the desired pulse shape for a given
specimen and set of crash conditions. In addition, aspects of
the waveform can be varied through changes in the Set cylinder
volume and the gas pressures in each cylinder prior to firing.
A metering pin, with the capability of producing a nominal 40
ms half-sine pulse, is provided as standard.
HYGETM , INC. offers a metering
pin design program, which enables the engineer to
enter the characteristics of the desired waveform and automatically
generate the required metering pin profile.
Rail System and Carriage
The rail sections are precision ground on the top, bottom
and inside edge to provide guidance for the specimen carriage.
Each rail section includes the necessary anchor bolts, bolt positioning
template for locating the bolts in the concrete foundation, the
necessary nuts and washers.
A sturdy specimen carriage has a flat top with tapped mounting
holes and the sides for equipment/specimen mounting. The carriage
has pneumatic brakes on board which operate on the rail to stop
The primary energy source is an air cooled compressor, this is
connected to a 10 gallon (38 L) accumulator tank.
The control system allows the operator to input
the following parameters:
- Set Pressure
- Load Pressure
- Trigger Pressure
- Brake Pressure
The operator is led through the process in the proper sequence
and prevents loading of incorrect, unsafe, or out of sequence
parameters. Interlocks are hard wired to minimize errors.
The actual firing control can be performed manually from the
panel. The operator loads the trigger pressure, disengages the
lock yokes and begins the countdown sequencing to firing.
The 6-Inch HYGETM is capable of producing a wide
variety of shock pulses. A standard half sine wave metering pin
is supplied with the system. The pulse may be modified by adjusting
the HYGETM systems firing parameters. For example,
lower pressures will have a direct bearing on the velocity at
the end of the stroke.
- Max. Load Pressure: 2,000PSI (138 bar)/3000
PSI (207 bar)
- Max Set Pressure: 500 psig (34.5 bar)
- Maximum force: 40,000 lb (178 K newtons)/
56,000 lb f. ( 249 K newtons)
- Load Cylinder: 54 inch (1.37 m) x 6
inches (152 mm) diameter bore
- Set Cylinder: 54 inch (1.37 m) x 6
inches (152 mm) diameter bore
- Maximum stroke length: 24 inches (0.6
- Maximum Acceleration: 64G (627.6 m/s2)**
Maximum payload: 1,000 lb. (455 kg) Specimen**
- 115/230 VAC, 50/60 Hz, 1500 watts for control system.
|Air (3,000 PSI Option)
- Air Compressor 17 CFM (481 l/m) with 5,000 PSI (207
bar) tank farm
|*System can be configured for operation with
Compressed gas tanks (Nitrogen) at max operating pressure
of 2,000 PSI or High pressure compressor ( 3,000 PSI)
** At 2,000 PSI operation
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