BRUEL & KJAER 4809 - Technical Specifications; Rated Force and Dynamic Limits; Moving Element and Resonance Frequency; Magnetic Field, Fuse Inserts, and Motion

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Level Recorder 2307
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Power Amplifier 2706
Impedance
Head 8001
Vibration Exciter 4809
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Fig.4.2. Mechanical Impedance measurement
4.3. FORCE CONTROLLED TESTING
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For structural testing it is the general rule to control the Exciter with a
force-controlled compressor loop such as that shown in Fig.4.3.
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Exciter 4809 /
Force Transduc er
8200
Fig.4.3. Force-controlled structural test
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