Testing Services

Electro Dynamic Vibration System

Random Vibration - replicates complex frequencies in a chosen bandwidth. Vibration environments may have input from multiple sources such as wheels over a road. In these vibration exposures it may be more accurate to analyze and test using random vibration.

In random vibration the primary concern is the spectral content of the vibration being generated. Most random vibration tests are conducted using Gaussian random suppositions where maximum amplitude is not definable, and levels are measured in RMS values.

Sine Sweep Vibration - are sweeps across a frequency spectra, at a specific rate, testing can be performed to identify resonant frequencies of a UUT.

With sinusoidal vibration, the relationship between acceleration, velocity and displacement is fixed and frequency dependent. Variation in any one of these three parameters affects another, for this reason, all should be considered simultaneously when specifying sine vibration.

Sine Dwell Vibration - are dwells at a specific frequency, often at a resonant frequency, to duplicate a worst case condition for the UUT.

With sinusoidal vibration, the relationship between acceleration, velocity and displacement is fixed and frequency dependent. Variation in any one of these three parameters affects another, and for this reason, all of them should be considered simultaneously when specifying or observing sine vibration.

Sine on Random Vibration - is performed by overlaying a sine dwell on a random vibration profile.

Combined Environment Vibration - allows exposure of a UUT to vibration and an environmental conditions (hot/cold) simultaneously.

• Ling, Unholtz-Dickey and LDS
• Force ratings to 23,000 force pounds
• Frequency range of DC to 14,000 Hz
• Three inch stroke with tables to five foot by five foot

• MTS, Excite
• Force ratings to 30,000 force pounds
• Frequency range of DC to 1000 Hz
• Strokes to 10" with tables to six foot by five foot

• MIL STD 202, Method 201A; Vibration
  MIL STD 202, Method 204D; High Frequency Vibration
  MIL STD 202, Method 214A; Random Vibration
  A2LA Accredited

• MIL STD 810; Method 514; Vibration
  MIL STD 810; Method 516; Mechanical Shock
  MIL STD 810; Method 519; Gunfire Vibration
  A2LA Accredited

• MIL STD 883; Method 2002; Mechanical Shock
  MIL STD 883; Method 2005; Vibration Fatigue
  MIL STD 883; Method 2007; Variable Frequency Vibration
  A2LA Accredited

• IEC 68-2-6; Vibration(sine) A2LA Accredited

• IEC 68-2-27; Mechanical Shock A2LA Accredited

• IEC 68-2-29; Bump (shock)

• GR-63-CORE, Section 4.3.1; Packaged Equipment Shock
  GR-63-CORE, Section 4.3.2; Unpackaged Equipment Shock
  GR-63-CORE, Section 4.4.1; Earthquake Environment (vibration)
  GR-63-CORE, Section 4.4.4; Office Vibration
  GR-63-CORE, Section 4.4.5; Transportation VIbration
  A2LA Accredited

• GR-487-CORE;

• RTCA/DO-160; Vibration/ Operational Shock and Crash Safety A2LA Accredited

• Various SAE Mechanical Shock/Mechanical Vibration
  SAE J1211; Section 4.7, Mechanical Vibration
  SAE J1211; Section 4.8, Mechanical Shock
  SAE J1455; Section 4.9, Mechanical Vibration
  SAE J1455; Section 4.10, Mechanical Shock
  A2LA Accredited

• Various Bellcore and ASTM.