Abstract
During the vibration testing, various types of vibration drivers of different structures are used. Electrodynamic drivers are generally used for smaller excitation forces whereas for bigger excitation forces hydraulic drivers are used. The main disadvantage of drivers can be found in their size. One of the possibilities for size reduction may be a suitable engineering design. The paper deals with the design of a small uniaxial driver which uses an inertial driver as a source of the excitation force. The structure considers the requirements for stiffness changes of the whole system with the aim of available frequency range tuning.
Highlights
Every kinematic excitation system is composed of three basic elements
Doing this allows for stiffness tuning by changing the length of the leaf spring such that the natural frequency is shifted away from the desired working frequencies of the system [5]
In this figure the effects of the leaf springs on the natural frequency of the system is clear, where the table acts as a rigid member at the first few natural frequencies of the system
Summary
Every kinematic excitation system is composed of three basic elements. The first is the amplifier which is responsible for transferring sufficient energy into the working element, which is coincidentally the second part of the system. The third element is the fixing structure which is responsible for fixing the studied part and connecting it to the working element which must allow for motion in at least one dimension. The paper deals with a uniaxial kinematic driver. This driver is a system with one degree of freedom which is excited by the harmonic force. Equation (1) can be used to describe the natural frequency of a damped system, provided that the damping is relatively low, by:. From this equation (2) it can be seen that the natural frequancy is dependent on three parameters. It is desirable to account for system tuning within the structure of the driver
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