Custom airbag deployment measurement system
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Signal.X has deployed a 24 channel measurement system for
measuring the instantaneous pressure field associated with airbag
deployment in the passenger cabin of a vehicle.
The system is based on a National Instruments cRIO hardware platform and can acquire the temporal and spatial pressure distribution in the occupant space and display the result in an animated color intensity plot. (more) |
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24 surface mount pressure sensors capture Spatial and temporal pressure distribution
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Custom instrument development
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A large automotive manufacturer selected
Signal.X as the exclusive provider of application design and
LabVIEW development services for their next generation vehicle dynamics data
acquisition system. The new tool represents a leading edge
solution for the National Instruments' cRIO platform
industry wide. Signal.X worked in partnership with Michigan
Scientific Corporation
www.mischi.com to develop a smart enclosure for the cRIO
data acquisition controller, which meets a precise
specification for sensor signal conditioning and achieves
rugged portability suitable for worldwide fleet deployment.
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High-volume production NVH assessment
| A large diesel engine manufacturer, who already relies on the Signal.X MajX System to perform 100% NVH Assessment of a key product line, is expecting delivery of engine and turbocharger test systems for their next generation product which specify the MajX system. These projects include machine design aid responsibility and require Signal.X to conduct extensive studies to define appropriate NVH pass/fail metric formulations and assist in limit setting operations. |
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Durability cycling of fuel pumps
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This system will will automate long term durability
testing of fuel pumps to meet complex OEM
specifications while achieving maximum up-time
reliability.
The system features manual
control, custom test profile definition and
pre-defined OEM standard profiles.
Signal.X provided a Supervisory host application combined with an independent PXI Controller to achieve offline configuration in parallel with asynchronous sequencing of each bank |
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The system can independently control 5 banks of 5 pumps each while monitoring temperature, pressure, flow,, current, speed and voltage for each pump. |
Machine re-control
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A driveshaft durability test rig is re-controlled using a custom application designed and developed by Signal.X. The requirements called for a dedicated controller running a LabVIEW RT operating system and a supervising test executive to manage displays and test configurations. The application implemented real-time control over 3 axis of motion, fault protection and full flight recorder and recovery logic. |
Gearbox testing
| When a new gearbox was required to produce a more efficient fan operating position, Signal.X provided a custom application to score the acceptability of the gear mesh harmonics in low volume production. |
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Large engine combustion noise separation
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Working for a large diesel engine manufacturer, Signal.X was asked to produce an estimate of combustion induced noise and vibration. The technique employed is based on the principals of multiple input-multiple output signal analysis and requires a large array based measurement of cylinder pressure, vibration and optionally, sound. Related SAE Paper |
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Custom 3D positioning gantry turnkey system
| Signal.X designed and built a multi-purpose 3D scanning gantry for an automotive supplier in need of high resolution sensor scans covering a 20' by 8' by 3' space at the side of a vehicle. To meet the specification for portability and easy setup, Signal.X built a custom electronic services box to act as a single interface for motion control, safeties, power, and measurement connections. A custom LabVIEW application managed all gantry functions and gave the customer the ability to perform fully autonomous mapping of 10's of thousands of grid points over the 3D volume. | |
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Production axle testing
| Axles in automotive applications are a critical component to the overall NVH perception of the vehicle. MajX is used internationally to score axle gear mesh quality in a variety of different types of axle test machines. | |
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Wind tunnel data logger and display
 
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An automotive supplier utilized Signal.X to design and develop a large acquisition, logging and display system to monitor several hundred parameters surrounding wind tunnel operations. The system included an interface to National Instruments DIAdem for reporting |
Exotic material damping measurement
| NASA Glenn Research Center received a custom application to test small beam samples for damping properties at elevated temperatures in vacuum. A shaker excites the beam while a sine sweep method is used to produce a frequency response function |
A sine sweep method is used to identify the resonance frequency from the frequency response function of the beam sample. Damping can be determined as a function of temperature and resonance frequency |
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Seat track NVH metric development
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Signal.X worked with a leading
vehicle interior systems
supplier to investigate
production line metrics which
were objective indicators of
undesirable audio phenomena such
as buzz, rattle impulsiveness,
harmonics, surging, etc.
Stationary Loudness used to quantify human perception |
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 Audio impulsiveness metric is quantified from objective data |
Steering system acoustic validation test
| An automotive OEM contracted Signal.X to create custom acquisition and analysis software to process very low level audio signals emanating from the clockspring mechanism in a steering wheel. The testers will become the master certification rig for prospective suppliers |
A steering system tester automates the rotary motion of the steering wheel while capturing audio and processing to Sound pressure level and Loudness as a function of wheel position. |
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