Dwelling at resonance is the ideal way to put a structure through low- or high- cycle fatigue. Assessing the lifecycle of a complete product or component using its own resonances as excitation is simpler than ever with the 900 Series Vibration Controller

Resonance Dwell testing starts out as a dwell at a structure’s resonance – but as the part fatigues or otherwise dynamically changes, the dwell frequency is tracked and the dwell remains at the resonant frequency.  Resonance Dwell Testing is commonly used for fatigue (low- or high- cycle) testing, or to assess the lifetime of a product such as a turbine blade.


High Cycle Fatigue Resonance Dwell Testing
High Cycle Fatigue Resonance Dwell Testing

Resonance Dwell Testing of Turbine Blades

Turbine blades are some of the toughest to control, high Q resonances. Data Physics Controllers and Shakers offer the best control over lightly damped resonance structures because of their optimized sine control loop, and their renowned algorithms.

In the adjacent photo, a turbine blade is being excited at its resonance with simultaneous thermal cycling.

Resonance Dwell Features

The 900 Series controller software offers advanced Resonance Dwell features that execute control over the toughest, highest-Q structures and accommodate a wide variety of test requirements.  Our third generation of Resonance Dwell software is not only technically superior – it streamlines testing.

Optimized control loop

Ultra-fast closed loop control for control of lightly damped resonances

Long Test Durations

Tests can execute for days, weeks, or longer.  Data is saved throughout the entire dwell.

Customizable Control Channels

Specify different channels for the baseline sine sweep and the controlled dwell.  Run a baseline sine sweep with an accelerometer, and switch control to a vibrometer or other sensor during the resonance dwell

Use any sensor

Compatible with accelerometers, laser vibrometers, conditioned strain, and other sensors

Manual Ramp Up

Manually bring up the dwell level slowly to prevent overshoot

Flexible Dwell Definition

Specify Dwell level in displacement, velocity, or acceleration – or use a breakpoint table as the dwell profile

Manual Mode Controls

Change the dwell level or duration live during test with the Manual Mode controls

Automated Resonance Search

Pre-define resonance search criterion and allow the test to run fully automated.  Multiple resonances can be identified and corresponding dwells can run sequentially – all automated

Test Automation and Sequencing

Run a Resonance Dwell test as a part of a larger test schedule that includes other test types.  Interact with a thermal chamber to automate complex thermo-vibe tests.