Propulsion Testing

Signal Conditioning Solutions for Rocket Engine Testing

Testing rocket engines presents numerous challenges to the measurements engineer. Hundreds of sensors measure thrust, fuel flow, pressure, vibration, strain, temperature, and other variables under extreme operating conditions. The sensors connect to cables that are exposed to the harsh environment of the test stand and must be run over long distances outdoors. Given the difficulty and expense of conducting a single test, failure to collect accurate, defendable data is not an option. Moreover, real-time sensor monitoring must be used during a test to ensure safety and prevent catastrophic failure. With so much at stake, a robust measurement system must be in place at test time.


RS-25 Rocket Engine for NASA's Space Launch System 

Pyroshock Filtering

NASA Stennis B1/B2 Test Stand

Precision Filters' suite of signal conditioning products was developed for measurement challenges like those encountered in testing rocket engines. For each sensor type, a signal conditioning strategy is required that minimizes unwanted noise, maximizes data quality, and verifies sensor and cable performance. Our products incorporate unique and proprietary signal conditioning technology that provides unmatched data quality for both static and dynamic sensor measurements. Flexible hardware and software include built-in functionality for performing in situ instrument, sensor, and cable validation that no other products on the market provide.

Read on to learn more about the application of PFI technology to rocket engine testing and flow measurement.

28124 Strain/Bridge Conditioner

  • 4 channels/card,
    64 channels/system
  • Excitation: Balanced Constant Current™
    or constant voltage
  • AC shunt calibration for verifying transducer, cable, and measurement system frequency response

28304 Charge/IEPE Conditioner w/ LDTEDS™

  • 4 channels/card,
    64 channels/system
  • Dual mode: IEPE or charge
  • REZCOMP™ technology to extend frequency response of accelerometer, microphone and pressure sensor measurements

28524 Frequency to Voltage Converter

  • 4 channels/card,
    64 channels/system
  • DC output representative of input frequency
  • Programmable low-pass filter and output scaling