Brüel&Kjér modal exciters，this unit serves two different purposes depending on which exciter is connected。
When paired with Type4827or4828，the unit provides variable stiffness to the armature suspension and correctly centres the armature in relation to both the exciter’s housing and to the device under test（DUT）in order to ensure it is in the zero position。
Alternatively，when paired with Type4824825or4826，the unit applies electrical pre-tensioning force to the tension-wire stinger linking the exciter and the input transducer attached to the DUT。
Pre-tensioning forces of up to up to 20%of the exciter’s force rating can be applied to the stinger。
USE SCENARIOS
- Armature stiffnes and centring，when used with Type 4827 or 4828（required）
- 电气pre-tensioning，when used with Type48244825 or 4826（optional）
CHARACTERISTICS
DC Static Centering Unit Type 1056 features a potentiometer that provides continuous adjustment of the armature position relative to the stroke or maximum peak-to-peak displacement。
列车运行信号
sent from an optical sensor built into our modal exciters.The sensor monitors the exact position of the armature by scanning the surface of aspecially designed arm that extends from the exciter’s armature to ensure that it is at zero position（±3mm）。
An LED display on the front panel shows the armature position and alerts you when there is over-travel-if the armature is either above or below the zero position.Another potentiometer allows stiffness of the armature suspension to be preset electronically。
