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Sonic boom acoustic tests

This video, from a NASA Social event at Armstrong Flight Research Center, shows an F/A-18 producing a regular sonic boom at 0:43 and and then a low “boom” by performing the dive maneuver at 02:34. NASA researchers are preparing for public tests of technology designed to reduce the noise of sonic booms

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03 July, 2018



Autonomous vehicles explained

Safran’s SimplyFly! light hearted series of video’s takes on autonomous vehicles - how will they work and what are the main challenges? Learn more about the topic by watching this video.

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20 June, 2018



Space Launch System - in numbers

Discover how engineers are outfitting the world’s most powerful rocket with sensors, cables and other equipment in this 2:40 video.

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15 May, 2018



 

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The FAA is asking for feedback on its proposed changes to the testing regimes for bird ingestion into engines. But what is the average size of a snow goose, the flocking bird responsible for the 2009 engine incident at LaGuardia the FAA is basing its tests on?

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Precision Filters, Inc.

240 Cherry Street
Ithaca, NY 14850
USA

Email: sales@pfinc.com
Web: http://www.pfinc.com/
Tel: (+1) 607-277-3550

 

Testing in gas turbine test cells or wind tunnels often requires dealing with a complex set of challenging environmental conditions. Hundreds of sensors and lead wires collect data on pressure, strain, vibration, and temperature while interacting with the extremes of these conditions. Hot gases, magnetic fields, and noise pick-up further complicate testing. A systems approach combining world-class signal conditioning with fast, rigorous self-testing separates the noise from your critical data.


Precision Filters’ 28000 system is designed for demanding test environments. The 28000’s innovative signal conditioning techniques, combined with automated go/no-go testing and annual calibration, give you confidence in your data—while reducing setup and troubleshooting time.
 

Precision 28000 Signal Conditioning System


Precision Filters’ Balanced Constant Current™ (BCC™) technology allows wide dynamic range measurement of strain in harsh environments using a two-wire connection to the gage. The circuit is insensitive to temperature-induced changes in lead resistance. Because the circuit is balanced, the differential input amplifier rejects noise pickup in the leads. Also, the circuit keeps measuring strain if a gage terminal shorts to the test article.


 

 

 

Static or Dynamic Strain Conditioning


For static or dynamic strain measurements, the 28124 Wideband Transducer Conditioner supports a variety of transducers, including those requiring constant voltage or BCC excitation.

  • Four channels per card, up to 64 channels per system
  • BCC or constant voltage excitation
  • Programmable bridge completion and shunt cal
  • Transducer excitation, loop resistance, and leakage resistance measurement and reporting
  • Transducer and cable health monitoring
  • Multiple buffered outputs
  • Programmable AC/DC inputs

 

 

Vibration Amplifier


For acceleration, velocity, and displacement, the 28302B Vibration Amplifier accepts inputs from single-ended or differential piezoelectric or IEPE accelerometers. Programmable high- and low-pass filters remove unwanted out-band signals from acceleration and velocity outputs. The 28302B provides one DC output and simultaneous buffered AC outputs for acceleration, velocity, and displacement.
 

  •  Two channels per card, up to 32 channels per system
  • Single-ended or differential piezoelectric accelerometers
  • IEPE accelerometers
  • Remote velocity sensors
  • Buffered AC and DC outputs
  • Programmable high- and low-pass filters

 

 

IEPE Accelerometer Measurements


For IEPE accelerometer measurements, the 28316C Isolated IEPE Accelerometer Conditioner with Long Distance TEDS™ (LDTEDS™) conditions IEPE accelerometers or remote charge converters. Isolated channel input conditions grounded accelerometers without introducing ground loops. Programmable channel gain and 4-pole low-pass filters provide clean amplified output signals.

  • Sixteen channels per card, up to 256 channels per system
  • Isolated IEPE conditioner or AC filter/amplifier with balanced differential input
  • LDTEDS compliant
  • Transducer bias monitor
     

 28000 System

  •  Precision Filters’ 28000 Analog Signal Conditioning System offers the flexibility you need to manage your test measurements.
  • Mix and match up to 256 channels of fully programmable transducer conditioning.
  • Automated factory acceptance and go/no-go tests verify system performance.
  • Choose 2-, 4-, 8-, or 16-slot frames.

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