Understanding the Physics of Electrodynamic Shaker Performance
نویسندگان
چکیده
DYNAMIC TESTING REFERENCE ISSUE is recognized as being elastic rather than rigid. This is modeled by treating the coil and table as separate masses connected The performance envelope of an electrodynamic shaker system is strongly influenced by three modes of vibration and the voltage/current capacities of the power amplifier that drives it. Other limiting factors are the designed stroke (displacement) of the table, the moving mass and the total mass of the shaker, the thermal power limit (i2R) of the coil and the stress safety factor of the armature. This article will discuss a basic electromechanical shaker model, how to determine Maximum Drive performance for sinusoidal testing, the merits of pneumatic load-leveling suspensions and the often overlooked side effects of shaker isolation. It will also examine system performance from a power perspective and present a simple means of estimating maximum system performance.
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