Vibration control system produced by RULA Technologies are used with a specialized software package for running vibration tests – VisProbe SL. Each software option in VisProbe SL can be activated independently of the others to meet the user’s requirements.

The graphic subsystem of VisProbe SL contains a convenient contextual menu, provides displaying several graphs in one window, autoscale option, unlimited number of user cursors, additional grid lines, textual notes.

VisProbe SL supports all types of vibration tests: Sine, Random, Sine on Random, Sine and Random on Random, Sine on Sine, SRS, TTH, time waveform replication etc. Furthermore, the software enables running and controlling Multishaker tests.


Sine tests with fixed or swept frequency provides highly accurate multi-channel control in real time. Resonance Search and Tracking Dwell option helps to determine FRF peaks of the object under test.


In case of Random Vibration the object under test is subjected to true random signal with the preset PSD and either Gaussian or non-Gaussian distribution. Random test provides a closer vibration impact to the actual environment.


RL-C21 supports all the classical pulse types. The shocks are run automatically with the preset interval or in the manual mode. To get the best accuracy the system adjusts drive voltage before each shock.


Besides the Random Test, the RL-C21 controller enables running the following types of tests:

  • Sine on Random
  • Random on Random
  • Sine and Random on Random
  • Sine on Sine

Shock Response Spectrum

The SRS test provides the possibility to control the SRS of the device under test to match the required one. RL-C21 supports all the classical types of wavelets. The shocks are run automatically with the preset interval or in the manual mode. To get the best accuracy the system adjusts drive voltage before each shock.

Transient Time History

The Transient Time History (TTH) test provides the possibility to simulate seismic impact. RL-C21 supports all the most commonly used types of waveforms, such as sine and cosine waves, damped sine wave, teardrop, etc.

Field Data Replication

The Field Data Replication test provides the possibility to reproduce the acquired field data on a shaker in the lab. This test gives the user highly accurate reproduction of the environment avoiding imitations used in Sine, Random or SRoR tests.


RL-C21 system can control vibration shakers with up to 6 degrees of freedom. The system identification algorithm is based on computation of transfer-function matrix. This approach allows controlling vibration as well as rotation.

Supported test types are Sine, Random, Shock and FDR.

Sequences of Tests

A test sequence provides the possibility to execute a set of tests by pressing one button. E.g. if the object under test is to be tested sine test first, and then a series of shocks, all the user need to do is to join these tests together into a sequence and start it.

Pre-start Check

The RL-C21 system is able to run a pre-start check of the vibration set by providing sine vibration with preset amplitude and frequency. This mode verifies the operation of the amplifier, controller, shaker and sensors. All the relevant information and graphs, such as spectrum scope and oscilloscope, are available to the user.

Transient Capture

The Transient Capture option provides the possibility to capture a transient waveform for post processing.

Data Recording

The data from input channels are recorded into a file of specialized open format. Sample rate of the recording can be changed so that to achieve the optimal combination of the accuracy of data acquisition and the size of the created file.

The recorded file may be used in the “Field Data Replication” test or analyzed in any specialized software.

Fatigue Tests

RL-C21 provides the possibility to run specialized fatigue tests, intended to evaluate the durability of turbine and compressor blades. This mode enables running Sine test with several sine tones simultaneously, searching resonances and tracking several frequencies at the same time. Each sine tone is controlled independently to get the best possible accuracy.