Modal Excitation System Type 3624 Designed for demanding modal test applications, electrodynamic Modal Exciter Type 4824 provides precise, reliable, stable and long-lasting operation. Highest quality materials, rugged construction and stringent quality control assure a versatile means of modal excitation for any experimental modal test. Modal Exciter Type 4824 is available as a stand-alone unit -supplied only with the appropriate trunnion and connecting cable -or as a complete system (Type 3624), with matching power amplifier and standard set of stingers and cables. Optional accessories include traditional push/pull stingers, tension wire stingers, robust lateral modal exciter stands, turnbuckles, cable extension kits, chuck nut assemblies and various adaptors. Uses and Features Uses • General mechanical mobility measurements • Experimental modal analysis using SISO, MISO, SIMO and MIMO testing techniques • Advanced structural dynamics investigations • Structural damage detection • Finite element model correlation and validation Features • Force rating 100 N sine • 1-inch peak-to-peak displacement for best low-frequency excitation • Wide operating frequency range: DC - 5000Hz • Through-hole design for choice of tension wire stingers or traditional push/pull stingers • Rugged, industrial design • High force-to-weight ratio due to rare-earth magnet technology • High-rigidity, low-mass magnesium armature for minimized force drop-off at resonance frequencies • Compact, lightweight construction providing easy positioning/ orientation relative to test object • Low stray magnetic field • Ideal for any excitation signal (sine, impulse and random signals) • Built-in optical sensor for accurate determination of armature position • Electronic DC control of tension wire pre-tensioning (optional) • Full range of stingers - tension wire technology or traditional push/pull stinger technology (optional) • Robust lateral exciter stands for easy positioning and orientation (optional) • Can be delivered as a complete turnkey excitation system Type 3624

Description Based on rare-earth neodymium magnet technology, this modal exciter features small physical dimensions relative to the force rating along with low total weight and a low-mass, high-rigidity, spring-suspended armature. The low armature weight helps to ensure high-quality force measurements by minimizing force drop-offs at the test specimen’s resonance frequencies. Four upper radial flexures and four lower radial flexures, the latter providing an additional guide for best stabilization, form a strong rectilinear guidance system which keeps the driver coil perfectly centred in the magnetic...

Rated Current: 5.5 A Suspension Stiffness: 4 N/mm (23 lbf/in) Effective Moving Mass: 0.23 kg (8.1 oz) Main Resonance Frequency: >6000 Hz Weight with Trunnion: 21 kg (46.3 lb) Dimensions: See Fig. 1 Matching Power Amplifier: Type 2732 (120 VA) Rated Force [sine (peak)/random (RMS)]: 100/70 N (22/15 lbf) Useful Frequency Range: 2-5000 Hz Operating Frequency Range: DC-5000 Hz Max. Rated Travel: 25.4 mm (1 in) Max. Velocity [sine (peak)/random (RMS)]: 1.5/1.5 m/s (59 in/s) Max. Acceleration [sine (peak)/random (RMS)]: 432/304 m/s2 (44/31 g)

Type 4824 Modal Exciter includes the following: • AQ-0649: Cable with two 4-pin Neutrik® speakON® plugs, length 5 m (16.4 ft) • KC-1007: Trunnion • UA-1612: Three adaptors M6 to 10-32 UNF Modal Excitation System Type 3624 Modal Excitation System includes the following: • Type 4824: Modal Exciter • Type 2732: Power Amplifier (120 VA) • UA-1598: Three Push/Pull Steel Stingers, including: - 3 x fastening screws - 3 x adaptors, diameter 2.5 mm to 10-32 UNF - 3 x steel rods, length 500 mm, diameter 2.5 mm - 1 x 2.5 mm collet chuck (chuck nut with collet insert) Optional Accessories ELECTRICAL...