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Home > Excitation > Modal Exciter 25 lbf

Modal Exciter 25 lbf

Model 2025E

When performing experimental modal analysis, the choice of excitation function and system can make the difference between a good measurement and a poor one.  For many modal test applications, an electrodynamic shaker system is best suited for creating an appropriate input forcing function.  Distributing adequate input force energy across the test structure and obtaining accurate and reliable input force measurements is critical for successful modal testing.  This often requires a shaker that is highly portable, rugged and easy to setup in order to facilitate the best exciter location (relative to the test structure) while minimizing any unwanted interaction between the exciter and test structure.

The Modal Shop 2025E, a very lightweight electrodynamic modal exciter, is capable of providing 13 lbf (58 N) of peak force excitation in a small footprint weighing just 13 pounds (6 kg).  With a 0.7” (18 mm) stroke and frequency range up to 9 kHz, the 2025E is suitable for structural testing and experimental modal analysis applications, including single and multiple inputs (SIMO and MIMO) using random, burst random, sine dwell and chirp excitation signals.

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  • Through-hole armature with chuck and collet attachment provides simple setup with modal stingers
  • Lightweight and portable – weighing just 13 lbs (6 kg) with a approximately 5” (125mm) square footprint
  • Trunnion base provides flexibility when choosing best exciter location(s)
  • 0.7” stroke and broad frequency range supply adequate input energy for most small to mid-sized modal test applications
  • Forced air cooling sufficient to meet full shaker performance (25 lbf pk) specifications

All of The Modal Shop modal shakers are supplied in a trunnion base allowing full rotation for easy setup.  The through-hole armature design with chuck and collet attachment is ideal for use with either traditional modal stinger rods, like the 2150G12 1/16” diameter stingers, or piano wire, like the K2160G piano wire stinger kit with force sensor quick disconnect.  These stingers greatly simplify test setup with easy connection to the force sensor and test structure, and help decouple cross-axis force inputs, minimizing or eliminating input force measurement errors.  For horizontal force inputs, the modal shakers adapt directly to the 2050A lateral excitation shaker stand, allowing convenient position adjustment over a wide area relative to a test structure.