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How to Select the Right Vibration Test System: A Practical Guide

Selecting a vibration test system isn’t just a purchasing decision – it’s an engineering judgement call that directly affects product reliability, test accuracy, and long-term operational efficiency. Whether you're validating a new design, running production tests, or simulating harsh real-world environments, the right system ensures your results are meaningful and repeatable.

This guide breaks down the essentials of choosing a vibration system that fits your application, your payload, and your performance requirements.

The Importance of Choosing the Right Vibration System

A vibration system must do one thing exceptionally well: deliver controlled, predictable mechanical motion. But the demands placed on that system vary dramatically depending on the test. From high-displacement low-frequency sweeps to high-g random profiles, the system must be capable of producing the required motion without distortion, instability, or overload.

 

Choosing the wrong system can lead to:

  • Underpowered tests that fail to excite real defects
  • Overstressed equipment and premature system wear
  • Invalid test results
  • Safety risks
  • Costly redesigns or retesting


Getting the selection right from the start saves time, money, and engineering effort.

LDS V8900 Slip table close-up with accelerometer

1. Start With Two Critical Inputs

Every vibration system selection begins with two sets of information:

knowledge, resource center, articles, one spring element for all cases, one spring element for all cases

A. Details of the Load

You need a clear understanding of the physical characteristics of the item you’re testing – and everything attached to the armature.

Key parameters include:

  • Mass
  • Size and shape
  • Static and dynamic centre of gravity
  • Fixture mass
  • Any additional hardware (head expanders, thermal barriers, accelerometers, slip tables, etc.)


These factors determine how much force the system must deliver and how the payload behaves dynamically.

knowledge, resource center, articles, one spring element for all cases, one spring element for all cases

B. Details of the Test Specification

The test profile defines the system’s performance requirements.

Typical test types include:

  • Swept sine (including dwell tests)
  • Random vibration (broadband or narrowband)
  • Sine-on-random
  • Shock/bump tests
  • SRS (Shock Response Spectrum)


Each test type stresses the system differently – for example, sine tests are peak-force-driven, while random tests are RMS-force-driven.

2. Additional Factors to Consider

Beyond the payload and test profile, several practical considerations influence system selection. These are:

System Force Capability

Can the system move the largest expected payload at the highest required test levels? This is the fundamental sizing question.


Performance Limits

Every system has constraints:

  • Maximum displacement
  • Maximum velocity
  • Maximum acceleration
  • Usable frequency range


Your test must fit comfortably within these limits – ideally with 20 – 30% headroom.


Payload Support

Large or top-heavy payloads may require:

  • Internal load support
  • External support (for example, bungees)
  • Special fixtures or head expanders


Ignoring support requirements can lead to armature sag, distortion, or damage.

Operating Environment

Where the system will live matters:

  • Laboratory vs. production floor
  • Cooling requirements (air-cooled vs. water-cooled)
  • Heat rejection into the room
  • Available utilities
  • Operator skill level


A system that’s perfect on paper may be impractical in your facility.

 

Application Type

Is this a general‑purpose test facility or a dedicated production setup?

  • General‑purpose systems need flexibility
  • Production systems need repeatability and robustness
4622-LDS GU Korea - testing up a test 2
V994 in Royston factory with workers Left


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3. Example System: V830-335 SPA10K

To illustrate the selection process, the original document uses the LDS V830‑335 SPA10K as a reference system. Its key performance metrics include:

  • Frequency range: 0 – 3000 Hz
  • Travel: 50.8 mm peak-to-peak
  • Velocity: 2000 mm/s peak
  • Acceleration: 75 g peak (sine), 60 g RMS (random)
  • Force: 1000 kgf peak (sine), 1000 kgf RMS (random)
  • Armature mass: 12.85 kg
  • Body mass: 616 kg
  • Isolation system: 5 or 10 Hz

 

These values represent the system’s maximum capabilities – and they form the basis for determining whether it can handle a given test.

LDS V8900 shaker vertical, side view

4. The Sizing Process

The document outlines two detailed sizing workflows:

  • Swept Sine Sizing
  • Random Sizing


Both follow the same philosophy:

Choose a system you believe is suitable – then prove it with calculations. Always aim for 20 – 30% spare capacity.

This ensures the system isn’t constantly operating at its limits, which improves reliability and reduces maintenance.

5. Final Thoughts

Selecting a vibration test system is part science, part engineering judgement. The key is to:

  • Understand your payload
  • Understand your test requirements
  • Match them to a system with adequate force, displacement, velocity, and acceleration
  • Leave room for safety margins
  • Consider the practical realities of your test environment


A well-chosen system delivers accurate, repeatable results – and protects both your equipment and your product.

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This recorded webinar 'How to Select the Right Shaker System for Your Application' will guide you through the planning process of choosing the right Shaker System.

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