Modal Exciters Types 4827 and 4828

Designed for demanding modal testing applications of large structures, electro-dynamic Modal Exciters Types 4827 and 4828 provide precise, reliable, stable and long-lasting operation. Highest quality materials, stringent quality control and rugged construction provide for a versatile means of modal excitation for any experimental modal test using the attached excitation method.

With a force rating of 650N (sine) and 1000N (sine) respectively, Modal Exciters Types 4827 and 4828 are ideal for high-precision excitation of a variety of mechanical structures in SISO/SIMO test setups, e.g., large automotive structures, aerospace structures, locomotives, truck body-in-white, large engines, large industrial turbines, heavy-duty pumps, etc. These modal exciters are also ideal for demanding and uncompromised excitation of large and very large structures in MISO/MIMO test setups.

The low armature weight helps to ensure high-quality force measurements by minimising force drop-offs at the test specimen's resonance frequencies. Unique roller guide suspension of the armature provides for a full 2˜ peak-to-peak displacement capability and form a strong rectilinear guidance system providing very high transverse stiffness to counteract rotational movement of the structure under test. Also, through this configuration, Modal Exciters Types 4827 and 4828 can absorb high lateral forces without damage to the exciter's internal construction.