Vibration Shakers and Modal Exciters

Full range of modal and inertial shakers with integrated and easy-to-use amplifiers. Our permanent magnet shakers are compact, lightweight, and powerful general-purpose shakers that can be used for modal and vibration testing. They have a high DUT capacity despite their small sizes.

Main Features

  • LIGHTWEIGHT, DURABLE, PORTABLE: All our vibration shakers are built with extreme care and quality, are very durable and small enough to be easily portable. The inertial shakers are easily mounted and have great mobility. 
  • INCLUDED INTEGRATED AMPLIFIER: Dewesoft vibration shakers and vibration exciters have integrated amplifiers. With this integrated amplifier, it is very easy to use the shaker. You only need to plug the electric cable and the shaker is ready to run. DS-MS-250 and DS-MS-440 come with a dedicated external amplifier.
  • INTEGRATED SIGNAL GENERATOR: All shakers have integrated sine signal generators. This gives customers the option to try the test system or the shaker or make some simple test to understand structural behaviour.
  • SUPERIOR LOW-FREQUENCY PERFORMANCE: Offering optimal force performance over a wide frequency range – the inertial shaker IS series spans from 10 to 3,000 Hz
  • TRUNNION AND HANDLES: All PM shakers have trunnion and handle allowing the shaker to be positioned in any orientation and position.
  • INTEGRATED SCREEN: This feature can be used only with an integrated signal generator. It shows the frequency of the generated signal. By visualizing generated signal frequency it is possible to set the shaker to a certain frequency from 1 Hz to 15 kHz and even can see the behavior of the structure under excitation with a certain frequency.
  • SMALL AMPLIFIER BOX FOR INERTIAL SHAKERS: All inertial shakers are using the same amplifier box. This box is also capable of generating sinus signals and can be used for 3rd party shakers as well. The small, all-in-one box can be customized to generate different signals like white or pink noise or different forms.

Permanent Magnet Shaker

Dewesoft permanent magnet shakers are compact, lightweight and powerful general-purpose shakers which can be used for modal and vibration testing. They have high DUT capacity despite their small sizes. DYN-PM-20 and PM-100 have an integrated amplifier and a sine wave signal generator where the frequency can be adjusted from 1 Hz to 15,000Hz.

Advantages:

  • Lightweight, durable, portable and easy to use
  • Adjustable trunnion base provides a high degree of flexibility
  • Broad frequency range
  • Embedded power amplifier and signal generator for PM-20 and PM-100

Applications for PM Shakers

Permanent Magnet shakers are used for Vibration testing and Shock testing:

  • Vibration testing of micro parts, assemblies, and electronics Modal testing
  • Shock testing
  • Sensor calibration
  • Separation and compacting of powders
  • Fatigue and resonance testing
  • Velocity transducer or high-speed actuator
  • Mechanical impedance measurement
  • Education and research
Permanent Magnet Shaker

Modal Shakers

Modal testing can be performed with modal hammers or shakers. If high-frequency excitation content or signal-controlled testing is desired, then modal shakers are the only excitation solution. Dewesoft modal shakers are lightweight and powerful modal shakers which can go up to 15,000 Hz and provide force levels up to 440N with a maximum 25mm stroke.

Advantages:

  • Modal stinger can be easily adjusted by the through-hole armature
  • Lightweight, durable, portable and easy to use
  • Adjustable trunnion base provides high flexibility
  • Up to 25mm stroke and broad frequency range

Applications for Modal Shakers

Modal shakers can be used for Modal testing and Structural Dynamics. 

The series of Dewesoft modal shakers covers a wide range of structures for dynamic characterization from electronic boards and sub-components to machinery, vehicles and aircraft, even constructions.

  • Components, Machinery, Vehicles, Aircraft, and constructions
  • Aerospace and
  • Automotive

Modal Testing is a prerequisite for design and product validation in aerospace and automotive industries as well as many others.

Modal Shakers

Inertial Shakers

The shakers used in modal testing and in-flight tests of aircraft are usually electrodynamic shakers. However, the traditional shakers are not very portable and the attachment process takes time. Dewesoft inertial shakers are easily mounted and have great mobility. It can be used as a handheld.

Advantages:

  • Compact and lightweight design
  • Superior low-frequency performance
  • Any angle mounting
  • Low friction bearing guided

Applications for Inertial Shakers

Inertial shakers are used for Vibration and Modal testing. Inertial shakers are used for testing car chassis, squeaks and rattle testing in cars, civil engineering prototype testing, building structures, floor loading resonances, ships’ flight decks, helicopters rotor simulation, submarines, geophysical surveys, and vibration cancellation systems.

  • Civil engineering
  • Automotive
  • Aerospace
  • Shipbuilding
  • Education and research
Inertial Shakers

Shaker Amplifier Included

All our vibration shakers come included with an amplifier out of the box.

MS-20 and MS-100 vibration shakers have integrated amplifiers. With this integrated amplifier, it is very easy to use the shaker. You only need to plug the electric cable and the shaker is ready to run.

DS-MS-250 and DS-MS-440 come with a dedicated external amplifier. Specifications can be found on the tech specs page.

Shaker Amplifier Included

Perfect Data Acquisition Systems For Data Recording and Analysis

We offer very high dynamic data acquisition systems to accompany our vibration shakers and offer a total all-in-one tool for vibration testing and vibration analysis. 

Systems include direct IEPE sensor inputs with 160dB dynamic range. That's not all. Signal amplifiers are available for virtually any sensor or signal. TEDS IEEE 1451.4 technology makes sure that your TEDS sensors are connected, recognized, and configured in the software automatically.

Award-winning data acquisition software makes it easy to set up measurement under a minute. A software license is included in every system. Free lifetime software upgrades included. No yearly maintenance or upgrade fees, free online training courses.

Our data acquisition systems are modular and expandable. Can you imagine an FFT analyzer with thousands of channels? We can... Systems can be gradually expanded from one to an unlimited number of channels.

Perfect Data Acquisition Systems For Data Recording and Analysis

Modal Test

In real life applications, machine parts and mechanical systems are rarely under static loading. Most of the time they are excited by dynamic loads. The structure responds to these dynamic loads according to its dynamic parameters such as natural frequencies and mode shapes. Therefore, an engineer has to have a solid insight into the dynamic behaviour of the structure which has been designed. The process of finding the dynamic behaviour of a structure is called structural system identification.

Structural system identification consists of finding the transfer function of the system which is established by finding the modal parameters of the structure such as, natural frequencies, damping, modal vectors, and residues.

The transfer functions of a structure can be obtained by mathematical modelling or by experimental methods. The experimental way to obtain the transfer function of a structure is achieved by measuring the response of the structure to a measured input. The responses are generally acceleration and the inputs or excitations are generally impulses or random/sine signals.

More information on the Modal Analysis application page.

Modal Test

The impulse signal is easily generated by a modal hammer with a force transducer attached at its tip. The random or sine signal excitation requires modal shakers. Moreover, if high-frequency excitation content or signal-controlled testing is desired, then modal shakers are the only excitation solution. Dewesoft modal shakers are lightweight and powerful modal shakers which can go up to 15,000 Hz and provide force levels up to 440N with a maximum 25mm stroke.

The modal shaker is attached to the structure and the desired excitation signal is applied to the structure via a signal generator. In the meantime, the responses of the structure are
measured and Frequency Response Functions are calculated which are used in the Modal Analysis calculations.

More information on the Modal Analysis application page.

Modal Test

FAQ

What is a vibration shaker?

A shaker is an electromagnetic device that is used for vibration testing for excitation of the structure under test. It's used for modal or endurance testing.

What are the different designs of vibration shakers?

We have 3 different vibration shaker design types for different applications:

  • Permanent magnet shaker
  • Modal shaker
  • Inertial shaker

What is a Permanent magnet vibration shaker? 

Permanent magnet vibration shakers (DS-PM) are shakers with a mounting table on top, on which you can place your device under test.

What is a Modal vibration shaker?

Modal vibration shakers (DS-MS) excite the structure under test by a stinger and are used for larger structures or structures that can't easily be mounted to the Permanent magnet shaker table.

What is an Inertial vibration shaker?

Inertial vibration shakers (DS-IS) are small in size and weight and hence used by mounting or pressing against the structure. They are portable and simple to use.

What sizes of shakers are available from Dewesoft?

Modal and Permanent magnet shakers come in 4 different sizes with 20N, 100N, 250N, and 440N of sinus output force. The Inertial shakers come in 4 sizes with 5N, 10N, 20N, and 40N of sinus output force.

Can I use the vibration shakers for a prolonged time?

Yes, PM/MS-20 and PM/MS-100 come with a pneumatic coupling that allows you to connect the shaker to compressed air for cooling. The PM/MS-250 and PM/MS-440 come with a cooling blower in the package.

Do I need to buy an amplifier to drive the shaker? 

All Dewesoft vibration shakers come "ready to work" out of the boz. Smaller PM & MS shakers come with an integrated amplifier. Larger PM & MS, as well as all, IS shakers come standard with a proprietary external amplifier.

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