An overview of the measuring setup

An overview of the measuring setup can be seen in figure 4.Thesinusoidalexcitationisprovidedbyelectrodynamicshakersystems. There are three shaker systems available: a small onefor forces up to 100N and 10Hz to 2kHz, a medium one upto 800N for 10Hz to 3kHz and a large shaker up to forcesof 10kN and frequencies of 10Hz to 2kHz. The shakersconsist of two parts, the vibration exciter itself and a poweramplifier. The kind of excitation is determined by the chosensignal created by a function generator. This signal directlymodulatesthecurrentsignalwhichdrivesthecoiloftheshakerarmature