Vibration System
The purpose of vibration testing is to determine the ability of an object to retain its properties and integrity under the vibration of a given degree of rigidity. 
Vibration shakers are designed to test the product for vibration strength and resistance as per the highest requirements.
Hydraulic shakers are used:
  • at considerable loads;
  • for reproducing significant movements;
  • at low and medium frequencies. 
Electro dynamic shakers are used:
  • frequency range 10 Hz - 3.5 kHz;
  • short displacements;
  • good vibration acceleration and push force performance;
  • low transverse vibrations.
Vibration Control System
The control system is designed for adaptation in fatigue and resource testing systems at a frequency varying in some band and for determining the dynamic properties of the test object. The control system is suitable for electrodynamic and hydraulic shakers.

  • User friendly interface displaying the structure of physical tests. 
  • Built-in Pretest mode for Resonance search and inverse model of the shaker;
  • "COLA" mode for connecting supplementary devices, for output signals;
  • Vibration control and analysis.
Software
Modes: 
  • Sine;
  • Sine on Random;
  • Classical Shock;
  • Random;
  • Replication Waveform.
Pre-test and resonance search modes are used for system setup and test preparation.

Pre-test
Before conducting the vibration tests it is necessary to make sure that the sensors and the shaker are connected correctly, the tested object is installed and fixed and the test parameters are set. 
To control the level of input vibrations on the tested object, the test engineers use feedback sensors. However, the sensor can only control the vibration level, but is not able to change the resonance behaviour of the system.
In order to improve the quality of tests and control the influence of resonance and antiresonance phenomena on their course, the control system has a pretest mode.
The controller gives a signal at different frequencies and determines the presence of resonances, after their detection it adjusts the transfer coefficients. The result is an inverse model, which is then used in testing.

Resonance Search
Resonance search, tracking and holding at resonance is used for fatigue and durability testing at resonance frequency, determination of dynamic properties of the test object.
Standard Test Rigs
Multi-axial Electro hydraulic loading System
  • Electro hydraulic loading
  • Multiaxial loading by the vibratory displacement
  • Axial loading to 10 tonnes
  • Loading repeatability error 5%
  • Loading frequency 5 - 150 Hz

Drop Testrig

Drop testrig is designed to test the product on shock loads with the possibility of changing the force and frequency of loading.
Drop testrigs allow testing similar to free-fall testrigs, by raising the aluminum table to a height of 1 meter, as well as by forced acceleration of the table from a relatively low height due to the reverse action of the pneumatic actuator.
The seismic mass with de-weighting system allows mounting the rig without a special basement. The change in the shape of the shock is determined by the rigidity of the pneumatic pad installed between the moving table and the seismic mass.

  • Loading - 1000 kg
  • Shock pulse duration - 1-18 мs
  • Acceleration 150-6000 m/s2
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