To acquire FRFs of an engine, it is hung with bungee cords to imitate free-free boundary conditions. Two modal shakers were used to excite the V6 engine block. Shaker excitation provides better consistency and repeatability than a modal hammer. It also produces a cleaner data set because of a greater average. Multiple sensors are roved through the engine to obtain the vibration characteristics.
Read MoreThis paper concentrates on the MESA Sine on Random control per MIL STD 810H, method 514.8, annex D, 2.3 category 14. This category governs Sine on Random control for helicopters.
Read MoreIn the coming months, Sentek Dynamics will be installing and commissioning our first shock testing system offering a variety of wave types from half-sine to trapezoidal, peak acceleration of 1000 g’s, and capable of testing payloads of up to 200 kg. Alongside vibration, temperature, and humidity capabilities, shock testing will be the latest in the contract test services offered by the Sentek Dynamics Charlotte facility.
Read MoreIn today’s distributed work environment with employees working on-site and remotely, cloud capabilities are essential for an organization to operate effectively. Sentek Dynamics customers have a powerful time-saving tool available to them in the Engineering Data Management [EDM] Cloud by Crystal Instruments, Sentek Dynamics sister company and world-class data acquisition and vibration control innovator. The EDM Cloud provides a digital workplace for monitoring vibration tests from anywhere in the world.
Read MoreThis paper discusses the usage and unique features of Multiple-Exciter Single-Axis (MESA) control with Crystal Instruments vibration controller.
MESA is a type of multiple exciter setup with all exciters arranged along a single axis. The goal is to combine the excitation forces and dimensional capabilities from multiple exciters to test a long and/or large Unit Under Test. MIL-STD-810G Method 527 discusses the terminology involving single and multiple exciter testing configurations.
Read MoreSentek Dynamics’ THV Series Environmental Test Systems with the Crystal Instruments’ Spider-101 Controller provide a turn-key solution for product development/certification and reliability improvement. The Crystal Instruments’ controller with IEEE Time Synchronization is the optimum solution for combined temperature, humidity and vibration testing of batteries, electrical and electro-mechanical components.
Read MoreThe right test equipment is essential to successful product testing. When purchasing a new vibration testing system (shaker) or environmental test chamber, choosing the right model for your test requirements is important. This article provides tips to aid in making the right choice.
Read MoreDeveloped by the automotive industry where Swept Sine testing is the standard, Multi Sine is a test type to that reduces the run time by running multiple sine tones simultaneously as opposed to the single sine tone of a standard Swept Sine test. Crystal Instrument’s Multi-Sine tests offer up to 9 simultaneous sine tone sweeps, covering the entire frequency band of the Swept Sine test in a fraction of the time.
Read MoreThis article examines the acquisition of modal characteristics from a bullet train wheel by performing experimental modal analysis. The wheel vibrations affect the dynamics of the wheel-rail interactions. Understanding these vibration characteristics will help mitigate the vibration and noise at high speeds.
Read MoreIt is our pleasure to announce that Sentek Dynamics is expanding our business with a new office location:
Sentek Dynamics Corporate Office
2090 Duane Avenue
Santa Clara, CA 95054
