Ground Vibration Testing (GVT)

GVT provides the critical experimental data needed to correlate structural models, improve flutter prediction, and secure pre-flight certification. HBK accelerates this process with a complete, scalable solution combining high-performance instrumentation, synchronized data acquisition, and advanced modal analysis software.
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Validate Before First Flight

Using precise instrumentation and high-performance software, we validate that your aircraft's dynamic behavior matches analytical predictions to drastically reduce pre-flight certification risk.

Improve Flutter Prediction Confidence

Correlate physical measurements with analytical models to improve flutter prediction accuracy and support safe flight envelope development.

Manage Complex Aircraft Test Programmes

Execute large-scale Ground Vibration Testing campaigns with synchronised measurements, scalable workflows and reliable data quality.

From a Simulation to a Safe First Flight

For certification engineers and structural dynamics teams, GVT is the moment where analytical predictions are tested against physical reality. The results determine whether models are sufficiently accurate, whether flutter margins are well understood, and whether the programme can begin flight test preparation with confidence. 

Aircraft certification depends on this validation. But aircraft structural testing is complex, time-constrained and requires the use of hundreds of synchronised measurement channels. 

HBK provides a scalable measurement workflow that simplifies test setup, execution and analysis, solving three key challenges:

The Challenge

How HBK Helps 

Correlating models with physical test data, causing programme delays, re-testing, and increased certification risk.HBK enables engineers to acquire reliable, high-quality experimental data for model validation, providing the measurement accuracy and workflow integration needed to give engineers confidence in their aircraft certification testing results. 
Synchronising measurement channels distributed across large aircraft structures within tight development schedules.HBK's scalable measurement workflow simplifies test setup, execution, and analysis – allowing engineering teams to maintain data quality across large channel counts without adding unnecessary complexity.
Gaps in model accuracy and lack of integration between measurement and analysis solutions skew flutter predictions,  creating significant consequences for flight safety and programme timelines.HBK combines integrated measurement, modal analysis software, and structural dynamics expertise to help engineers improve model correlation and build confidence in flutter predictions before flight testing.

A Complete Ground Vibration Testing Workflow

Ground Vibration Testing requires a tightly integrated workflow that combines instrumentation, synchronised data acquisition and advanced modal analysis to produce reliable structural validation data.

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Controlled excitation using modal shakers enables accurate modal identification across the full aircraft structure + Lightweight, high-sensitivity accelerometers minimise mass loading while maintaining measurement accuracy.

On-board measurement - Sensing

Synchronise vibration data from all measurement channels with the accuracy and scalability that large GVT campaigns demand.

  • LAN-XI and Fusion-LN DAQ systems for synchronised, high-channel-count acquisition across the full aircraft.

On-board measurement - Data acquisition

Process measured data, identify modal parameters, and correlate physical measurements with finite element models to support engineering decisions and certification activities.

  • BK Connect® modal analysis of aircraft for modal parameter identification, FE model correlation, and flutter prediction support.

On-board measurement - Analytics
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How Electrification is Changing Aircraft Testing

Discover why new aircraft architectures, advanced materials, and electric propulsion systems are increasing the importance of Ground Vibration Testing for model validation, flutter prediction, and certification readiness.

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Key Areas of Application

Aircraft Certification Testing

Ground vibration testing is mandatory for new aircraft and for existing aircraft that undergo modifications, forming a required step in the structural validation and certification process.

HBK's integrated measurement workflow provides the accuracy, channel scalability, and data quality needed to generate the experimental evidence required for regulatory approval and the transition to flight test.

Flutter Testing and Validation

Accurate flutter prediction depends on the quality of correlation between analytical models and physical test data.

HBK's combined measurement and analysis workflow enables engineers to validate and refine finite element models with confidence, improving flutter boundary predictions and reducing the risk of encountering unexpected aeroelastic behaviour during flight test.

Aircraft Modification and Re-certification

When an aircraft undergoes structural modification, its dynamic behaviour must be re-validated before returning to service.

HBK provides the instrumentation, data acquisition, and modal analysis capability needed to assess the structural impact of modifications efficiently and support re-certification activities without full-programme re-testing where it can be avoided.

Military Aircraft Testing

Modern combat aircraft are dynamic, complex, and built from advanced materials – all of which make testing and certification highly complex.

HBK's scalable, high-channel-count measurement system and integrated analysis software provide the reliability and data quality needed to support structural validation and airworthiness certification within demanding defence programme timescales.

Helicopter Structural Validation

Rotor dynamics and complex structural interactions make analytical prediction particularly challenging for rotorcraft. Physical modal testing for aircraft is therefore an essential validation step.

HBK provides the complete measurement chain needed to help teams validate helicopter structural models and support airworthiness activities across both civil and military rotorcraft programmes.

UAV and eVTOL Structural Testing

As unmanned and electric vertical take-off and landing platforms grow in complexity, structural validation before first flight is increasingly important for novel configurations where limited operational history makes analytical prediction less certain.

HBK's modular measurement ecosystem provides the scalable modal characterisation data needed to validate models and support certification activities for new platform types.

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FAQs

Ground vibration testing is typically performed before flight testing to validate the structural dynamic behaviour of an aerospace vehicle. The results are used to correlate analytical models, improve flutter prediction and support certification activities.

Ground vibration testing provides the experimental data required to validate structural dynamic models and improve the accuracy of flutter predictions. Reliable model correlation gives engineers confidence in structural performance before flight testing.

Yes. Ground vibration testing correlates experimental measurements with finite element (FE) models, helping engineers verify analytical predictions and improve the accuracy of structural simulations throughout the development programme.

Large GVT campaigns require complex instrumentation, synchronised measurements across hundreds of channels and high-quality data collected within demanding development and certification schedules. An integrated measurement workflow helps improve testing efficiency while maintaining measurement accuracy.

HBK provides an integrated ground vibration testing solution, combining instrumentation, synchronised data acquisition, modal analysis software and structural dynamics expertise. This enables engineering teams to acquire reliable test data, validate analytical models and support efficient development and certification programmes across a wide range of aerospace platforms.