Environmental Testing

Pyroshock Testing

SRS SHAKER SHOCK

SRS Shock tests are specified in the Frequency Domain in terms of acceleration (G) vs. frequency (Hz) and typically are associated with high-g environments caused by severe impacts, explosive events, etc. SRS (shock response spectrum) transient shocks incorporate a broad range of frequencies into the test pulse which better approximate the real mechanical event. SRS shock is sometimes called “Pyroshock” because the high-G environment being simulated is often generated by an explosion (pyrotechnic event).

SRS Pyroshock testing is commonly used to determine a test article’s ability to tolerate the mechanical stress waves produced by a high frequency, high-G shock event, such as rocket stage separations. SRS pyroshock specs are found in most aerospace hardware test procedures, given as a graph profile showing “response” acceleration (g) on the Y-axis and frequency (Hz) on the X-axis. The Y-axis acceleration values represent the profiled g-level measured by a set of analysis filters that have a specified gain, or Q factor (Q = 10 typical).

Experior Laboratories uses Unholtz-Dickie T-2000 vibration systems optimized for high G shaker shock up to 5,000 G. Unholtz-Dickie vibration systems have inductively coupled solid metal coil armatures to prevent driver coil failure. Shakers with 3” stroke and 180 in/s of velocity allow for high G shock tests with large displacement requirements or short transients.

Experior Laboratories performs SRS Shock testing
with levels up to 5000 G on the T2000 Shakers,
making Experior Labs the industry leader in
SRS Shaker Shock.

For near or midfield Pyroshock or SRS Shock requirements that exceed the limits of an electrodynamic shaker, Experior Laboratories uses a custom Kinetic Impact Pyroshock Simulation system which allows highly customizable shock generation at levels in excess of 30,000 G.

PYROSHOCK

Our Kinetic Impact Pyroshock Simulation (KIPS) test system is able to simulate near and mid field Pyroshock, experienced by the parts closest to a pyrotechnic event, by using high speed impact to excite a tunable resonant beam. By adjusting the impact force, location, and damping, this platform allows for highly customizable shock generation. Our pneumatic system allows for quick setup and resets, and means we don’t have to charge ‘per shock’ to get a custom shock profile right.

Adjustable resonance allows us to boost acceleration in only the desired frequency range. For shocks with a specified Te (event duration), adjustable muzzle velocity, impact mass, and custom damping materials allow us to customize shock duration while meeting acceleration requirements.

The KIPS system boasts short transients, narrow differences between positive and negative SRS traces, and a uniform shock input that allows for near-equal measurements at multiple fixture mounting points. We’ve designed a wide variety of custom shock platforms and fixtures using frequency analysis software to identify mode shapes and resonant frequencies, which lets us prevent cross-axis acceleration and ensure that units are not over-tested.

30,000 G Shock, measured at two diametrically opposed
accelerometer locations

PYROSHOCK
HORIZONTAL SHOCK SYSTEM

Experior Laboratories’ new horizontal shock system represents a dramatic increase in the size of units that can undergo SRS Shock testing.  Parts mount to a 40”x40” platform that matches directly with slip tables on our high power T2000 electrodynamic shakers, allowing a seamless transition from vibration to shock. An internal compressor boosts impactor pressure high enough to reach 5,000G on parts over 500lb.  Chromed precision guide rods ensure the platform travels only in the direction of the applied shock. Programmable electromagnetic clutch brakes grab the table after impact to allow resonance and prevent secondary impacts. The system allows adjustment of padding, pneumatic parameters, and brake timing to adjust knee frequencies between 250Hz and 3000Hz

TEST STANDARDS

MIL-STD-810
MIL-STD-1580
MIL-STD-1540
NASA GSFC-STD-7000A

SPACE TESTING PROGRAM

Experior Laboratories specializes in creating high-performing and demanding vibration, shock and vacuum tests associated with rocket launches and space environments. As one of the leading independent test laboratories in North America, Experior Labs is recognized for its superior customer service, consistent on-time delivery, project management by experts and end-to-end accountability.

Learn more about our Space Testing programs:experiorlabs.com/space-testing

SHOCK TESTING SLOW MOTION

HORIZONTAL TESTING SLOW MOTION

Shock Testing Expertise

Andy Shiang, Ph.D.

Engineering Manager

As the Engineering Manager, Dr. Andy Shiang will be responsible for leading engineering efforts to support the growing product qualification and testing business sectors.

Dr. Shiang brings over twenty years of specialized expertise in structural analysis, dynamics, and aerospace engineering. His most recent position has been at Aerojet Rocketdyne, where he worked on several large engine programs, laser and electro-optics, Kinetic Energy Weapons, energy systems, as well as the Commercial Crew Program. Dr. Shiang earned a BSME from Rensselaer Polytechnic Institute, as well as an MSME & PhD from Lehigh University.

Phil Rogers

Phil Rogers joined Experior Laboratories in 2014 as a Vibration and Shock Testing Specialist, after retiring from Unholtz-Dickie, where he worked as an Applications Engineer and Western Regional Sales Manager for 35+ years. Phil’s detailed knowledge of electrodynamic vibration testing systems and special testing techniques for achieving maximum vibration testing and shock testing performance from these systems is an asset that’s now available to all of Experior Laboratories’ customers.

progers@experiorlabs.com

Grace Beech

Grace Beech is one of the project engineers at Experior Laboratories, primarily focused in Dynamics.  She is responsible for most of the vibration testing and shock testing performed at Experior Labs.  Grace manages various aspects of the vibration testing lab, including fixture design and evaluation, program management, vibration testing capability evaluation, shaker troubleshooting and maintenance, and scheduling.

Grace joined Experior Laboratories in 2014.  She brought with her prior engineering experience from her work with Zodiac Aerospace’s business class seating segment, and also from her time as a manufacturing engineer in the vibration testing department at TriSep Corporation.  She holds a Bachelor of Science degree in Mechanical Engineering from the University of California, Santa Barbara.

gbeech@experiorlabs.com

Gerrit Lane

Gerrit Lane joined the Experior Laboratories engineering team in 2015 and has since overseen the successful completion of over 150 environmental test programs. Specializing in dynamics testing and applications, Gerrit has led the design of Experior Laboratories’ pyroshock simulation test system (KIPS), and has designed several custom suites of standard fixtures for vibration testing and shock testing applications.

Gerrit holds a Bachelor of Science degree in Mechanical Engineering from the University of California, Los Angeles.

glane@experiorlabs.com

Contact Experior Today To Learn More About Our Vibration Testing Capabilites

805-483-3400