Notching

Notching can be used to protect sensitive structures or assemblies from overload during a vibration test. Through continuous monitoring of defined channels and defined frequency domains, amplitude or other limit values are automatically limited as soon as critical values are reached. This ensures that the test can be carried out realistically but also safely - without endangering the specimen or the test equipment.

Notching by m+p international 

Efficiency

Clear graphical displays and external configuration options make setup fast and straightforward. You immediately see how limits apply, saving valuable time during test preparation.

Safety

Sensitive specimens remain fully protected: Reliable notching prevents overloads by keeping excitation within safe boundaries – no matter how demanding the test.

Flexibility

Define up to 50 individual limiting spectra and adapt them to your excitation type – from sine to random or shock. Combine notching, tolerance, and limit modes to create exactly the protection concept your test requires.

Quality

Trust in precise, transparent protection mechanisms. The combination of multiple limiting methods and clear graphical visualization ensures reproducible results and complete confidence in your test data.

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Reliable protection for sensitive specimens

By specifically limiting amplitudes in defined frequency bands, Notching reliably prevents structural overloads - even in the event of unpredictable resonance effects.

A software interface displays spectral data and notch profiles, illustrating the flexible definition of multiple limiting spectra.

Flexible definition of up to 50 limiting spectra

Limiting spectra can be defined via center frequency and bandwidth or directly via minimum and maximum frequencies. Linear, logarithmic or RMS-based slopes are available.

A software interface displays combinable protection modes with details like notch, tolerance, and limit settings.

Combinable protection modes: notch, tolerance, limit

Different protection strategies such as pure limitation (notch), mixed tolerance limits with warning/cancel function or automatic limits for resonance shifts enable precise adaptation to the testing needs

Adjustable depending on excitation

The notch parameters can also be configured individually depending on the excitation mode - for example, RMS-based in the random test, narrowband in the RoR or frequency-selective for superimposed sine components in SoR tests.

Graphical display & external configuration

Notch profiles are displayed graphically both during the test setup and during the run - including warning and abort limits. Notch tables that have already been created can be conveniently imported as ASCII files.

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Update to 
m+p VibControl 2.19 

Discover how the new features boost
your vibration testing.

Scalable measurement hardware systems - from 4 to hundreds of channels 

Two stacked m+p VibPilot devices feature multiple input and output ports for precise vibration testing.

m+p VibPilot - Compact DAQ systems

Choose our powerful, lightweight, and fan-less m+p VibPilot measurement front-end for all test setups with 4 or 8 channels and combinable for up to 32 channels, whether in vibration testing or in vibration and sound analysis.

An m+p VibRunner DAQ module and a rack stacked with several modules s displayed on a white surface.

m+p VibRunner - High channel count DAQ systems

Test large structures or applications with high data throughput using our modular m+p VibRunner hardware platform that can be flexibly scaled to handle hundreds of input channels or multiple exciters.

Applications for notching

Useful additional modules

Random vibration control

Excite your specimen with a real random pattern to perform more realistic simulations.

Shock vibration testing

Perform transient excitations to simulate shock loads on the specimen.

Mixed-mode testing

Simulate environments in which random excitations are mixed with superimposed harmonic or random loads, such as those occurring in a helicopter or tank.

Data reduction

Expand your channel count by synchronizing your DAQ system with other vibration controllers.

Time history recording

Use our throughput function to have a comprehensive signal base for further processing, for analysing short-term events during the test or for troubleshooting.

Multi-axis vibration testing

Testing with heavy specimens and several shakers or excitation in 3 axes simultaneously? Coupled or decoupled? With our multi-shaker solutions, you can carry out demanding tests safely and precisely.

Sine dwell vibration testing

Identify the breaking point of your test object during product development durability tests by holding and vibrating it at its natural resonance even if the frequency shifts.

Operating deflection shapes

Easily visualize the deflection shapes of a machine or structure, whether in operation or on a test bench.

Notching control

Protect your specimen and system from overtesting by using targeted notch control to limit vibrations.

Vector notching / Force-limited vibration testing

Carry out more realistic tests with increased system safety and better protection of the vibration exciter, e.g. when testing higher structures. The essential functions for a professional force limited vibration test are also provided.

Vibration test monitoring

Monitor your test stands using a higher-level tool and create clarity and structure in the large variety of signals.

High-frequency vibration testing

Handle high-frequency shaker tests on components such as control units, sensors, or gyroscopes, by increasing the control frequency from 20 kHz to 40 kHz.

Automation with test sequencing

Automate repetitive test sequences, such as a resonance-random-resonance search in a flexible schedule plan. This module also allows the controlled combination with external devices such as climatic chambers.

Automation with REST API

Integrate your tests into your IT environment for advanced automation and remote monitoring.

Transducer calibration

Calibrate your sensors in-house and benefit from a complete out-of-the-box system.

Reporting

Easily and quickly create custom reports that meet your individual requirements.

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Support

We offer personalized support from experts with excellent response times, not anonymous call-centre hotlines.

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Calibration

Choose between factory and ISO 17025 calibrations with on-site and rental services to minimize downtime.

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Training

Our experts help you train new employees, master new testing challenges, or optimize specific test processes.

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Maintenance Contracts

Let us take care of hardware calibration and software updates so you can focus on your tests.

“Life safety and security selected m+p as our preferred vibration controller supplier for the intuitive software and competitive pricing. As a UKAS accredited test house, we expect the highest levels of system reliability, stability and support which m+p have successfully delivered with every system.”

Andrew Lawson
Laboratory Manager at Intertek
Leatherhead/United Kingdom

“Life safety and security selected m+p as our preferred vibration controller supplier for the intuitive software and competitive pricing. As a UKAS accredited test house, we expect the highest levels of system reliability, stability and support which m+p have successfully delivered with every system.”


Andrew Lawson
Laboratory Manager at Intertek
Leatherhead/United Kingdom

“Life safety and security selected m+p as our preferred vibration controller supplier for the intuitive software and competitive pricing. As a UKAS accredited test house, we expect the highest levels of system reliability, stability and support which m+p have successfully delivered with every system.”


Andrew Lawson
Laboratory Manager at Intertek
Leatherhead/United Kingdom

Case studies

Mahle Filtersysteme | DE

Engineering tests for vehicles airfiltration and engine components

Aerospacelab

A cutting-edge vibration test system

Element laboratory | UK

Shake and bake testing for aerospace components

China Electronics Technology Group Corporation | CN

Radar reliability testing

Notching resources 

Notching – FAQ

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