Test oversized products or replicate field assembly by synchronizing two to four shakers along the same axis. The VR10500 vibration controller can perform multi-loop with phase control in the Sine, Random, Shock, and FDR test modes.
Download Demo All Software ModulesMulti-loop phase control synchronizes two or more shakers moving on the same axis while maintaining phase through level changes. It is achieved by using 2, 3, or 4 outputs of a VR10500. The outputs from one controller drive multiple shakers with the same test profile. The result is a synchronized set of shakers, ideal for complete system testing of a larger device.
Alternatively, dual-loop can be run with a phase offset in Sine to replicate a setup in the end-use environment, such as a push-pull configuration (180-degree phase difference).
A multi-loop test with phase control requires a VR10500 with multiple loops enabled. The primary VR10500 controller must drive all outputs, but the system can have stacked controllers for more than 16 inputs (up to 512).
The VR10500 outputs drive the shakers independently. VR control systems do not require phase matching hardware or matched shaker systems, nor is it necessary to tee the drive signal. VibrationVIEW’s standout phase control algorithm ensures shakers move identically along the axis.
The Sine, Random, Shock, and Field Data Replication (FDR) test modes can run 2, 3, or 4 output drive loops simultaneously but have different control capabilities.
Run random tests with Gaussian amplitude distribution.
Playback a recorded time-history file as a control reference; the output phase is synchronized.
Run a single frequency sine tone at a defined amplitude and time.
Run an industry-standard pulse or a user-defined transient pulse; the output phase is synchronized.
Oversized or heavy test items may be too large for a single shaker. VR control systems allow engineers to safely run one test profile on two shakers without rigid coupling or the need for matched systems.
Learn how to set up a Random and Sine dual-shaker test to run in phase with this technote.
Dual shaker control in Random (correlated random outputs) includes four control methods:
Graph settings include a control loop section, and the user can select which control loop demand, control, tolerance, and abort traces to plot. Any loop can be the reference for the transmissibility plot.
