Defense

High Performance Systems to Simulate the Harshest Field Conditions

Defence testing standards addresses a broad range of environmental conditions that include: low pressure for altitude testing; exposure to high and low temperatures plus temperature shock (both operating and in storage); rain (including wind-blown and freezing rain); humidity, fungus, salt fog for rust testing; sand and dust exposure; explosive atmosphere; leakage; acceleration; shock and transport shock; gunfire vibration; and random vibration. Environmental management and engineering processes that can be of enormous value to generate confidence in the environmental worthiness and overall durability of a system design. The test standards usually contains detailed military acquisition program planning and engineering direction to consider the influences that environmental stresses have on equipment throughout all phases of its service life.


We are able to offer complete solution for military standards (MIL-STD, GAM-EG.13) qualification testing on structures, using a shaker installation in a closed loop fashion. The solution supports swept sine, random, shock, SRS, combined modes and time replay-based qualification. In every qualification test phase and control mode, the system offers a wealth of safety precautions to protect the test article and test area


To support the test tailoring approach as described in many of the test standards, we can offer solutions to define test specifications for single axis random and swept sine vibration testing from measured load data. Resulting test specifications are equal in damage and are accelerated because of faster run times. Multiple acceleration loading environments are analysed for fatigue potential by calculating MRS (maximum response spectrum) and FDS (fatigue damage spectrum).


Test tailoring is a method for writing mechanical vibration test specifications starting from recorded measurements of the real environment. This method is described in industry standards such as GAM EG-13, MIL-STD 810F and NATO AECTP 200. It starts by analysing multiple acceleration loading environments for fatigue potential by calculating MRS (maximum response spectrum) and FDS (fatigue damage spectrum). Loading environments can be sine sweep, shock, power spectral density’s, measured or synthesized waveforms. Translating various loading environments into a common domain (MRS, FDS) provides easy comparison. Combining this info with the expected duration of each loading environment, a single target loading profile representing the product’s total life cycle damage can be estimated. A corresponding random or swept sine vibration profile representing identical damage as the target profile but shorter duration can be derived for laboratory qualification testing.


Application Examples

  • Communication Antenna Vibration  Qualification Testing
  • Gun Turret Field Vibration Simulation
  • Launcher Cartridge Field Transportation  Vibration Simulation

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Vibration qualification testing on field communication antenna

The M544A (50kN) shaker carries out a vibration test to qualify the field communication antenna set structural integrity, simulating harsh field condition based on MIL STD 810

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Field vibration simulation test on armored tank gun turret

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Transportation vibration testing on 3.8 ton launcher cartridge

The H3580A (300kN) shaker performing a vibration severity test on the 3.8 ton launcher cartridge, simulating the rough transportation conditions experience on the field