Exciter System for Large-Scale Modal Testing

Industry-exclusive design excites sine forces up to 4000N.

Mb Dynamics Modal 1000
MB Dynamics

MB Dynamics has announced its Modal 1000 exciter system for large-scale modal and structural testing.

The MB Modal 1000 can excite sine forces of up to 4000N (900 lbf), with a 2-inch (50 mm) peak-to-peak stroke and 1. 5 m/s peak velocity (60 inches per second), at frequencies from DC to 2000 Hz. Both thermal shutdown protection and overtravel control are provided as standard features.

The unique armature design of the MB Modal 1000 incorporates a “weak” suspension. The suspension may be fine-positioned to the test article using DC current. This is a particularly useful feature within lower-frequency response applications, such as ground vibration testing, where a DC-coupled exciter/amplifier may be in use.

The MB Modal 1000 exciter system may be used as either a stand-alone unit or paired with an MB P-Series power amplifier. The amplifier is housed within a 750 mm high, 19-inch rack cabinet and operates from 208-240V AC single-phase power. Supporting stingers, used to apply forces to the test article without exciter interference, are also available, measuring hex rod x 400 mm long with ¼-28 threads on each end.

Typical applications include: 

  • Structural damage detection
  • Larger-scale advanced structural dynamics investigations of buildings, bridges and commercial aircraft
  • Aerospace ground vibration testing
  • Large-scale experimental modal analysis incorporating MIMO, MISO, SISO and SIMO techniques
  • FEM correlation and validation
  • Smaller-scale structural testing with higher-level vibration inputs. 

For more information, please visit www.mbdynamics.com.

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