Modal shaker 4827

The most powerful of our modal exciters, Types 4827 (and 4828) offer precise and reliable operation in any modal testing scenario, including long-duration tests of outsized mechanical structures as well as applications with MISO and MISO configurations. Suitable for impulse, sine and random signals. The most powerful of our modal exciters, Types 4827 and 4828 offer precise and reliable operation in any modal testing scenario, including long-duration tests of outsized mechanical structures as well as applications with MISO and MISO configurations. Suitable for impulse, sine and random signals, they also have a wide frequency range (2 – 5000 Hz) and a peak-to-peak displacement of 50.8 mm (2 in). 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 These exciters have been developed using rare-earth neodymium magnet technology, to enable high force-to-weight ratios. When forced-air cooled by an external blower, Types 4827 and 4828 are capable of delivering sine forces up to 650 and 1000 N (146 and 225 lbf), respectively. They feature low-mass, high-rigidity armatures made of magnesium and suspended on springs that minimize force drop-offs at resonant frequencies and improve the quality of force measurements. Built-in optical sensors accurately control armature position.