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Testing that Reaches the World

MIL 810 Method 525 Waveform

MIL 810 Method 525 Time Waveform Replication (TWR) is commonly referred to as "Field Data Replication" and consists of taking a measured time history (time traces) from the real application (via mobile accelerometers and DAQ) and running it through a software program to generate a vibration profile with conservatively estimated test time vs random aging.  

This provides a degree of confidence that equipment can withstand the specified test duration to which the equipment is exposed in the field of operation under simulated environmental conditions.  Method 525 testing will estimate the equipment’s durability in relation to the form, level, duration, and repeated application of the test time.  At Clark Testing, we offer Method 525 TWR testing services to provide our customers with a level of certainty that equipment can structurally and functionally withstand measured or analytical test time traces as experienced in the field of operation. 

 MIL-810 Method 525 discusses TWR from a single-exciter/single-axis (SESA) vibration perspective.  Although there are test conditions for TWR testing between SESA, multiple-exciter/single-axis (MESA), and multiple-exciter/multiple-axis (MEMA), Method 525 is limited to SESA testing. Multiple-exciter TWR applications are addressed in MIL-Standard-810 Method 527.  

 SESA TWR consists of the replication of either measured or analytically specified time trace(s) in the laboratory with a single exciter in a single direction and is performed to accurately preserve the spectral and temporal characteristics of the environment. 

 Call or email the Clark Dynamics Test Laboratory for assistance in developing a test plan and conducting the appropriate MIL-STD-810G Method 525 TWR test based on field operating conditions. 

Test Set Up

In house custom design and fabrication capabilities (machining and welding) to ensure test fixtures accurately simulation environmental conditions.  FEA capabilities to support fixture design along with welding, fabrication & machining services.  Multiple vibration adapter plates and prefabricated test fixtures help to streamline the testing process.

Instrumentation capabilities including accelerometers and strain gages with multi-channel control and data acquisition equipment ensuring accurate test data is being recorded.  All instrumentation and equipment is provided with measurement uncertainty and compliant   with Clark’s ISO 17025-2017 Quality Program.

Lab technicians and engineers record daily test activities to register all activities, events, and responses during the test.  The daily test logs along with test data, pictures and test procedures are included in comprehensive test report that is the industry standard.

 We work closely with you to validate engineering, ensure quality, analyze test spectrums, and execute accurate testing programs for successful qualification and marketing of your product.

We work closely with you to validate engineering, ensure quality, analyze products and qualify equipment while supporting the time constraints and product cycles that are vital to your success.

Paul Heffernan, CEO of Clark Testing