Modal shaker 4825

These modal exciters are powerful. They combine a wide frequency range (DC – 5000 Hz) and up to 25.4 mm (1 in) of displacement for improved performance at low frequencies. Suitable for impulse, sine and random signals, Types 4825 (and 4826) can be used in SISO and SIMO tests of engines and other small mechanical components, as well as in MISO and MIMO tests of large devices. As light and compact as Type 4824, these modal exciters are much more powerful. They combine a wide frequency range (DC – 5000 Hz) and up to 25.4 mm (1 in) of displacement for improved performance at low frequencies. Suitable for impulse, sine and random signals, Types 4825 and 4826 can be used in SISO and SIMO tests of engines and other small mechanical components, as well as in MISO and MIMO tests of large devices. USE SCENARIOS General mechanical mobility measurements Experimental modal analysis, including long-duration testing of mechanical structures Single- and multiple-point excitation and response modal analysis applications, including SISO, MISO, SIMO and MIMO test configurations Advanced structural dynamics investigations Structural damage detection Finite element model (FEM) or finite element analysis (FEA) correlation CHARACTERISTICS Designed with the same rare-earth neodymium magnet technology as our other modal exciters, when forced-air cooled, Types 4825 and 4826 are capable of delivering up to 200 and 400 N (45 and 90 lbf) of sine force, respectively. To minimize force drop-offs at resonant frequencies and improve the quality of force measurements, these modal exciters incorporate low-mass, high-rigidity armatures made of magnesium and suspended on springs.