Use the COLA output on a VR controller hardware as a secondary control loop and control the DC offset of a select input channel. The user can specify which channel to use for closed-loop control as well as the scaling factor for the DC output.
Download Demo All Software ModulesDC Offset Control allows the COLA output on the VR9500/VR10500 to function as a secondary control loop. In doing so, the user can control the DC offset of a selected input channel.
The user can specify which channel to use for closed-loop control. The input must be configured as a DC input and have the same unit category as the DC signal.
The COLA output provides a voltage sync signal to external equipment. Aside from DC Offset Control, the COLA output can be differential, sine, or square, or can function as a DC frequency reference, a phase-controlled second output for multi-axis testing, or control only.
Vibration Research’s best-selling control hardware for vibration and shock testing. Scalable to 128 channels and compatible with all electrodynamic and servo-hydraulic shakers. Features include up to 200kHz sample rate and 2 outputs.
Vibration Research’s high channel count control hardware for vibration and shock testing. Scalable to 512 channels and compatible with all electrodynamic and servo-hydraulic shakers. Features include up to 256kHz sample rate and 4 outputs for multiple shakers.
The DC Offset parameters control the functionality of DC Offset Control. The user can define the scaling factor for the DC output using the units and Volts parameters. The parameters also control the DC Offset Reference option.
The DC Offset parameters also control the DC Offset Reference option. DC Offset Reference uses the COLA to output an open loop DC voltage proportional to a user-configured engineering unit. The desired output level is configured on a per schedule level basis within the test settings.
With the optional Motor Control add-on, the user can schedule motor operation in the Sine software. For example, an engineer can control a shaker and drive the test item’s motor simultaneously.
The VibrationVIEW software performs motor control by using the COLA as a DC Offset Reference or DC Offset Control. The controller outputs a DC signal proportional to the user-specified value.
In the Motor Control settings, the user enables, disables, or phase locks the angular velocity and sets the phase value.
The user can also use the motor control settings to configure a sine sweep by defining start and end levels and a sweep rate.
