Quad LDS V9 Shaker System

The quad V9 (4 x 105 kN) Vibration Test System has been specially designed for a transport simulation application testing structures at frequencies from DC and payloads exceeding 6 tonnes. With a cross section over 6 m x 3 m it is much larger in size than the vibration system interface plates. The capability to independently control the vibration accelerations at multiple positions on a single payload of this size is revolutionary.

The payload interfaces for each of the 4 V9s are not connected to each other. Therefore to control their relative positioning, a new Position Indicator Control Stand has been developed.

A special version of the LDS combo has been designed to incorporate a solid trunnion vibrator body mounting, with the slip table combo frame being attached directly to steel plates on top of a seismic mass. The base fabrication is designed to accept a Load Bearing Platform (LBP) used for vertical vibration.

An air isolated seismic block has been designed so that all forces are transmitted to this block. Testing is controlled using an LDS Multiple Amplifier Control (MAC) System together with a Multi Input Multi Output vibration controller (MIMO) to simultaneously control each V9 system independently in order to achieve the required combined effect. Using Airglides, the four combos can be readily repositioned into multiple orientations to enable both vertical and horizontal testing of various sized payloads.