Dual Excitation Shakers

Lengthy and heavy devices require dual excitation shaker systems for vibration testing. Dual excitation shaker systems typically consist of two shakers with horizontal or vertical orientations. Dual excitation shaker systems enable the testing of long and heavy UUTs in the Horizontal Push-push, Push-pull and Vertical configurations.

Push-pull shaker configuration — *Figure 2. Dual excitation shaker system Push-pull configuration*

Dual excitation vertical configuration — *Figure 3. Dual excitation shaker system Vertical configuration*

Technically it is possible to configure the entire series of Sentek Dynamics’ shakers to form dual excitation shaker systems. The criteria are per size and test level the unit under test requirements.

To facilitate all three horizontal and vertical dual excitation shaker system configurations, a rail system is required. Sentek Dynamics provides customized rail systems to facilitate quick and easily assembled configurations.

Figure 4. Rail system for Dual Excitation Shaker system

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Features/Advantages

Enables testing of lengthy and heavy devices which is not possible with one shaker
Horizontal Push-push/Push-pull configuration, and Vertical configuration for testing along all three translational directions
In-phase control on both shaker tables
Customized rail systems allow change of configuration from horizontal and vertical configurations
Customized slip tables and head expanders per test specimen dimension
Double spherical joint optional for vertical configuration

Multiple-Input Multiple-Output (MIMO) Control

Sentek Dynamics’ Dual Excitation shaker systems use the Crystal Instruments’ Spider System vibration controller for advanced MIMO control. The Spider System recreates multiple degree-of-freedom vibration environments in the testing laboratory and provides all the control types users may require including MIMO Random, MIMO Sine, MIMO Shock, and more. For more information regarding the Spider System see the Vibration Controllers section or contact the Sentek Dynamics’ sales office.