Saraswati Dynamics Private Limited (Sdyn) Roorkee, Uttarakhand

TTH control application provides a library which can be used to create a waveform like sine, chirp, beats and white noise signal. TTH can also play a short recorded data form field to simulate a transient or a pulse. Uses: Reproduction of recorded data form field on laboratory shaker system Door slam testing can be conducted with TTH control application

As the movement of the armature is based on magnetism, no physical contact is established with the shaker body. The armature is freely suspended in the air and without any suspension or auto centering system, it will sit at the bottom of the shaker. To achieve full displacement of the shaker, its armature should be centered. At Sdyn, we have multiple designs to center the armature based on customer specifications and test requirements. Our standard design utilises four sets of rolling struts spaced 90 degrees apart. Rubber bush and cam bolt is assembled inside each rolling strut to create mechanical stiffness which keeps the armature centered. Our long stroke design utilises four sets of rockers spaced 90 degrees apart. Rocker offers no mechanical stiffness and the armature is centered via DC from the amplifier. Both designs also utilise an internal load support bearing along with an air diaphragm to assist in the centering process with heavy load mounted on the armature.

Sdyn’s Vibration Controllers are tailored in 4/8/16 channel configuration to bring users the most advanced and complete range of vibration testing solutions. Our Vibration Controllers are compatible with any make of amplifier and shaker combination available worldwide. These controllers are perfectly suitable to perform vibration testing in all segments of the industry including defence, space, automobile, seismic, field equipment and consumer electronics. Coupled with analysis and documentation tools, our Vibration Controller makes the complete vibration system user friendly and an ideal means for checking the performance and reliability of your product against hazardous vibration environment to which your product would be exposed during usage. Our Vibration Controller can drive the complete range of electro-dynamic and servo-hydraulic shakers for single axis and multi-axis control applications in single and multi-shaker configurations. Sdyn’s Vibration Controllers employ high speed Digital Signal Processing (DSP) technology, low noise hardware design, optimised vibration control algorithms and high speed data transfer protocols. The software and firmware are based on multi-tasking topology with close-loop control operation between DSP and PC. This ensures true efficiency of real-time control with timely correction in input excitation to counter sudden change in response of the test system. We provide powerful features, high performance, greater than 110 dB of dynamic range and control frequency range up to 20 kHz, besides providing test engineers easy-touse application software packages. These Vibration Controllers are available with 4 to 16 input channels and are consistently modified/ upgraded to meet the demand of the latest vibration testing needs. Bundles of application software and embedded functions are specifically designed to work together so as to offer the best loop time and stable control during vibration testing. Our Vibration Controllers have the capability for making independent measurements of transfer functions and spectra of all the channels in use during vibration testing. These measurements may be independently scheduled at any time during the test and can be specifically set for analysis. Test data can be exported or imported into our software in all popular formats. Sdyn’s Vibration Controllers can be interfaced with any desktop or laptop running on Windows through USB or Ethernet interface.

LTH control application recreates field recorded data on the shaker. Unlike TTH, LTH can reproduce vibration on the shaker same as road vibration. Recorded data can be an earthquake or bumps on a road. Uses: Reproduction of recorded data form field on laboratory shaker system Door slam testing can be conducted with LTH control application

Drop test methods do not provide accuracy and repeatability like Classical Shock testing. This tests determines if the UUT can withstand transient vibrations encountered during its life in real environmental conditions.. Uses: Computation of shock response spectrum Bump/ Impact test replacement by shaker

Sine Control Application provides all excitation energy at a single frequency. It generates analog signal with the help of programmable sweep parameters. Sine control application is most applicable to measure the dynamic response of any Unit Under Test (UUT) Uses: Fatigue and Durability test at a single frequency or swept across a frequency band Characterisation of the structural dynamics of the UUT