Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training

Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training

Course Delivery

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Course Overview:

Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training Course Description

This is a three- day introduction Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training to the theoretical and practical aspects of high frequency shock testing, commonly called “pyroshock” or “pyrotechnic shock” testing.

The basic physics involved in pyroshock, including meaningful measurement and analysis of the environment, will be presented and discussed. The presentation encourages attendees (having varied structural dynamic backgrounds and experience) to contribute their personal experiences and observations, and thus to collaborate with the teaching staff and their fellow attendees. Their experience, if any, might range from the quantification of the flight environment to test simulation and/or qualification and flight acceptance of flight articles.

Customize It:

• We can adapt this Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training course to your group’s background and work requirements at little to no added cost.
• If you are familiar with some aspects of this Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training course, we can omit or shorten their discussion.
• We can adjust the emphasis placed on the various topics or build the Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training course around the mix of technologies of interest to you (including technologies other than those included in this outline).
• If your background is nontechnical, we can exclude the more technical topics, include the topics that may be of special interest to you (e.g., as a manager or policy-maker), and present the Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training course in manner understandable to lay audiences.

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Audience:

• This short Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training course is intended for a wide range of technical people, ranging from test technicians to test engineers to design engineers to senior scientists, who need to understand and conduct tests utilizing (or at least simulating) explosions. They also need to measure, record and analyze what happens to test hardware during and immediately after those brief events. Real world pyro shocks occur during explosions and explosive discharges, such as rocket engine ignition, stage separation, etc.

Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training – Skills Gained:

The objective of this course is to introduce the designer, technician and/or engineer to the phenomena of high intensity, short duration field and test laboratory transients and the possible deleterious effects on equipment.

Pyrotechnic Shock Testing, Measurement, Analysis and Calibration Training – Course Content:

Overview

Definition of pyro shock

Sources

• High orde explosives (PETN, RDX, detonation, etc.)
• Low order explosives (gas generators, pressure generators, deflagration etc.)

Physics

• Stress wave propagation
• Structural response

Data acquisition system

• Source
• Instrumentation
• Accelerometer – various types
• Signal conditioning
• Filtering, high pass and low pass
• Data storage
• Analog (recall Honeywell RTR recorders – long extinct)
• Digital
–Analog to digital conversion
–Sigma delta converters
–Low pass filtering requirements
• Calibration of data acquisition system
• Data integrity – verification and analysis
–Time history examination
–Frequency domain
–FFT
–Shock Response Spectrum

Ordnance Testing Methodologies

• Gathering and storing flight data
• Full scale structure simulation
• Sub scale structure simulation
• Surrogate structure simulation
• Testing real hardware that is later to fly

Simulation testing methodologies

• Electrodynamic Shaker
• Enhanced electrodynamic shaker
• Resonant Fixturing
• Mechanical Impact
• Gravity Driven Impact
• Testing hardware that is later to fly

Testing Examples

• Ordnance pyroshock test demonstration by NTS
• Electrodynamic shaker pyroshock simulation test demonstration by NTS
• Mechanical impact pyroshock simulation test demonstration by NTS

Instructor

Vladimir Valentekovich teaches about pyrotechnic and other forms of shock testing, measurement, analysis and calibration and consults in these fields. He s a graduate of UCLA with his Bachelor and Masters of Science in Mechanical Engineering. He worked as a Senior Test Engineer in Structural Dynamics, specializing in pyrotechnic shock, at Wyle Laboratories, El Segundo.

Vladimir was responsible for quantifying and publishing the high velocity, short duration stress wave resultant in near-field pyroshock, as referenced in the IES Recommended Practice 012.1 Handbook for Dynamic Data Acquisition and Analysis, Appendix A, Pyroshock and the 5th ed. Harris and Piersol Shock and Vibration Handbook, Chapter 26 Part II. Vladimir received the SAVIAC 64th Symposium Henry Pusey Award for this work in 1994.

Wyle Laboratories then was the first independent contractor to do pyroshock qualification testing using the Tomahawk Cruise Missile U/RGM-109D flight structure: from instrumentation, specifying the data acquisition system, placing the charge, to acquiring and analyzing the resultant data. Valentekovich developed many pyrotechnic shock test methods still used at Wyle. He continues to develop alternate pyro shock methods and test equipment including mechanical impact and ballistic shock simulations.
Vladimir currently consults for aerospace and defense firms who seek to design, perform and complete meaningful dynamics test programs.

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