Meggitt Sensing Systems Introduces Wilcoxon Research model F4/F7

By DE Editors

Meggitt Sensing Systems has introduced the Wilcoxon Research model F4/F7, a dual piezoelectric and electromagnetic vibration system, or “shaker,” designed to provide wide frequency range structural excitation, simulate external forces, determine structural resonance frequencies and provide structural characterizations under excitation within aerospace, automotive and general research and testing applications.

The design of the Wilcoxon Research model F4/F7 combines a high-frequency piezoelectric vibration exciter (model F7) encircled by a low-frequency electromagnetic vibration exciter (model F4). Units incorporate a transducer base, containing a force gauge for test structure force monitoring; and an accelerometer, for measuring resultant motion. Transducer signals can be fed into either read-out equipment or signal conditioners. The model F4 electromagnetic vibration generator provides low frequency excitation from 10 Hz to 7,500 Hz,  whereas the model F7 piezoelectric vibration generator produces vibrational forces over a high frequency range of 500 Hz to more than 20 kHz, resulting in the net capability to provide high force-to-weight output and a continuous sweep from low to high frequencies of 10Hz to more than 20kHz, with excitation capabilities across the entire audio range.

The model F7 contains a stack of piezoelectric plates which requires a voltage step-up (impedance matching via matching network) for high force output levels. The model F4 includes an air-cooling feature, allowing it to be run at higher output levels for extended periods without overheating.

For more information, visit Meggitt Sensing Systems.

Sources: Press materials received from the company and additional information gleaned from the company’s website.