How do I choose the right vibration test system for my product?

Choosing the right vibration test system for your product involves a systematic evaluation of your product requirements, the test standards you must meet, and the performance specifications of the testing equipment. As LinkoTest, we guide clients through this process by focusing on the core parameters that define the test environment, helping you understand How to Choose a Vibration Test System..

1. Define Your Product and Test Requirements

The first step is to thoroughly understand what you need to test.

2. 2. Key Specifications: How to Choose a Vibration Test System Exciter

The choice of shaker system components must directly correlate with the requirements defined above. Focus on these critical specifications:

A. Maximum Force Rating (F max)

The most important specification. The shaker must generate enough force to move your product at the required acceleration level.²

Where:

• M(payload) = Mass of the product + Mass of the fixture/Table + Mass of the Armature.

• A(required) = Maximum required acceleration (in G, converted to $m/s^2).

You must select a shaker with an F(max) significantly higher (e.g., 20% to 30% margin) than your calculated required force.

B. Maximum Displacement (Stroke)

This determines the shaker’s ability to achieve high G-levels at low frequencies. Low-frequency tests require large stroke.

• Rule: For a given acceleration (G), the required displacement is inversely proportional to the square of the frequency. If your test requires high G at low Hz (like transport simulation), you need a shaker with a long stroke (e.g., 2 inches peak-to-peak or more).

C. Frequency Range

Ensure the shaker and controller can operate across the required test frequency spectrum.

• Electrodynamic Shakers typically offer the best performance, handling ranges from 5 Hz up to 2,000 Hz or higher, necessary for most Random Vibration tests.

D. Table Size and Configuration

The armature table must be large enough to mount your test item and fixture. If the product is very large, you may need a head expander (a larger plate bolted to the armature) or even a slip table (for testing in the horizontal axis).

3. Selecting the Controller and Amplifier

A. Vibration Controller

Ensure the controller is capable of generating the required test profile:

• Software Capability: Must support the specific Sine, Random, and Shock test types required by your industry standards.

• Channels: Must have enough input channels to connect all the required control and monitoring accelerometers.

B. Power Amplifier

The amplifier must be precisely matched to the shaker’s continuous force rating to ensure reliable, high-power performance throughout the entire test duration without overheating or distortion.

4. Final Considerations

Would you like me to help you calculate the necessary force rating for your specific product and test requirements?