ISO 16750-3 shaker testing: What engineers need to know
ISO 16750-3 shaker testing is an important part of automotive electrical component testing. It is defined by the vibration profile, component mounting, test axes, electrical operating state, functional monitoring, and applicable acceptance criteria. For engineers planning the validation of automotive electrical and electronic components, these factors are critical. They determine whether the test setup adequately represents the intended application and whether relevant mechanical or functional weaknesses can be identified.
This article explains the key aspects engineers should consider when planning an ISO 16750-3 shaker test.
What does an ISO 16750-3 shaker test do?
A shaker applies controlled vibration to a component or assembly. The device under test (DUT) is mounted on a fixture, instrumented as required, and exposed to a defined vibration profile in one or more axes.
Depending on the applicable requirements, the component may be tested powered or unpowered and may be functionally monitored during vibration.
The purpose is to apply defined mechanical loads and identify weaknesses that could affect:
- structural integrity
- connector stability
- housing durability
- mounting behavior
- electrical continuity
- communication performance
- overall functionality
An ISO 16750-3 shaker test may include resonance search, sinusoidal vibration, sine dwell, broadband random vibration, multiple test axes, electrical monitoring, and functional checks before, during, or after testing.
Which of these elements are required depends on the applicable specification and the intended test program.
Which vibration methods are used in ISO 16750-3 shaker testing?
In automotive electrical component testing, different vibration methods evaluate different aspects of a component’s mechanical behavior. The applicable customer or OEM specification defines parameters such as frequency range, severity, test duration, test axes, operating state, and acceptance criteria.
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Sinusoidal vibration
Sinusoidal vibration testing applies controlled vibration at defined frequencies. It can be used to evaluate how the DUT responds across a specified frequency range and to identify frequencies at which increased movement or resonance occurs.
If required by the specification, a sine dwell may then be performed at a defined frequency.
IEC 60068-2-6 is commonly referenced as a test method for sinusoidal vibration. The specific test conditions are derived from the applicable product, customer, or OEM requirements.
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Broadband random vibration
Broadband random vibration distributes vibration energy across a broader frequency range. This method can represent mechanical loads that occur across multiple frequencies.
IEC 60068-2-64 describes test methods for broadband random vibration. The applicable component, customer, or OEM specification defines the specific test profile and additional requirements for the validation program.
Mechanical shock testing may also be part of a broader mechanical validation program. IEC 60068-2-27 addresses mechanical shock testing.
Should the component be powered during shaker testing?
Depending on the test program, the DUT may be tested in a powered or unpowered state. Some programs also require functional monitoring during vibration. The specific approach is determined by the applicable specification and the objective of the validation program.
Testing a powered component can reveal effects that occur under mechanical load, including:
- temporary voltage interruptions
- signal instability
- communication errors
- unexpected resets
- changes in sensor output
- intermittent electrical contacts
Functional checks may also be required before testing, at intermediate stages, or after vibration exposure.
The electrical operating state and required monitoring should therefore be defined before testing begins. This allows intermittent issues that occur during vibration to be detected and documented.
What can shaker testing reveal?
Shaker testing can reveal mechanical and electrical weaknesses under defined vibration loads. Depending on the component and test program, findings may include:
- loose connectors or fasteners
- intermittent contacts
- damaged wires or terminals
- cracked housings
- bracket deformation
- PCB or solder joint fatigue
- seal movement
- loss of calibration
- changes in sensor output
- communication errors
- noise or rattling
- reduced electrical performance
Identifying these issues early can support design improvements before tooling, final validation, or production release.
The test results show whether a component meets the defined requirements and can also provide insight into how and where a design responds to mechanical loads.
Why the complete test setup matters
A reliable shaker test is defined by the vibration profile and the complete test setup.
The behavior of the DUT is influenced by several factors, including:
- fixture design
- mounting points
- fastener torque
- component orientation
- cable routing
- accelerometer placement
- control strategy
- electrical instrumentation
- functional monitoring
These factors need to be considered together. The test setup should represent the intended mounting and installation conditions as closely as practical so that the relevant mechanical loads are transferred to the DUT.
The test fixture is particularly important. It connects the DUT to the shaker and is therefore part of the mechanical test system. Its design and dynamic behavior can influence the loads transferred to the DUT.
A reliable vibration test therefore begins with a technical review of the DUT, its mounting conditions, and its intended vehicle application.
What engineers need to define before an ISO 16750-3 test
An effective test plan starts before the component reaches the shaker. The test laboratory needs sufficient technical information to translate the applicable requirements into a defined test setup.
Before testing begins, engineers should clarify:
- applicable standard and revision
- intended installation location
- component dimensions and mass
- mounting drawings or CAD data
- applicable vibration profiles
- required test axes
- powered or unpowered operating states
- electrical interfaces
- parameters to be monitored
- number of test samples
- acceptance criteria
Providing this information early allows the test configuration, instrumentation, operating state, and evaluation criteria to be aligned. Technical questions related to the test setup can also be addressed during the planning stage.
At imat, this information is used to develop a structured test plan that connects the applicable requirements with the physical test setup, operating state, monitoring strategy, and evaluation of the results.
Conclusion: A reliable shaker test starts before the shaker runs
Within automotive electrical component testing, shaker testing provides important insight into how electrical and electronic components respond to defined mechanical loads. The value of an ISO 16750-3 shaker test depends on the interaction between the vibration profile, mounting conditions, fixture, test axes, electrical operating state, monitoring strategy, and acceptance criteria.
For validation engineers, a key task is translating the applicable requirements and the component’s intended application into a complete and technically meaningful test setup.
Clarifying these factors early creates well-defined test conditions, supports representative results, and makes potential failures easier to interpret. Careful test setup planning is therefore an essential part of meaningful vibration validation.
Would you like to discuss your ISO 16750-3 shaker test requirements?
Planning a shaker test starts with the applicable requirements, the component, its mounting conditions, and the functions that need to be monitored during testing. If you are preparing an ISO 16750-3 validation program, imat can review your requirements and help translate them into a structured test plan and appropriate test setup.
An initial discussion can help clarify your requirements, identify open questions, and explore the appropriate next steps for your test program.
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Read more about automotive electrical component testing: A validation guide
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Or contact imat to discuss your shaker test requirements directly
FAQs about ISO 16750-3 shaker testing
Is ISO 16750-3 the same as IEC 60068-2-64?
ISO 16750-3 addresses mechanical loads for electrical and electronic equipment in road vehicles. IEC 60068-2-64 describes a test method for broadband random vibration. IEC test methods may be used within a test program. The complete requirements are derived from the applicable component, customer, or OEM specification.
Does ISO 16750-3 define one vibration profile for all automotive components?
The required test conditions depend on factors including the component, its intended installation location, and the applicable specification. Engineers should first determine the relevant requirements and use them as the basis for defining the test profile and test setup.
Can an ISO 16750-3 shaker test be performed with the component powered?
Yes, if the applicable requirements specify an electrically operating DUT. Powered testing with functional monitoring can help identify intermittent electrical behavior or communication issues that occur during vibration exposure. Depending on the test program, testing in an unpowered state may also be required.
Why does the installation location matter for vibration testing?
The mechanical loads acting on a component depend on its application and installation environment. Information about the intended installation location is therefore relevant when determining the applicable vibration requirements and planning a representative test setup.