Digital Programmable Timing Device for Fast Response Instrumentation in Rotating Machines.

Abstract

The design, construction and test of an inexpensive computer peripheral device to control the acquisition of data from high response probes in periodic flows, is reported. The device (RPACE) was used with a Hewlett-Packard Model 21MX computer and 5610A A/D converter to obtain Kulite probe measurements in a transonic compressor by synchronized sampling. A phased-locked-loop and counting circuits were used so that the moment of A/D conversion always corresponded to a programmable displacement of a stationary probe with respect to the moving rotor blades - independent of RPM. Also, the rotor speed was measured digitally in one revolution of the shaft. The results of a 'survey' of a rotor blade passage at a blade passing frequency of 4500 per sec. are included. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1976
Accession Number
ADA051619

Entities

People

  • James Clyde West Jr

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acquisition
  • Aeronautics
  • Compressors
  • Computer Programming
  • Computer Programs
  • Computers
  • Conversion
  • Converters
  • Data Acquisition
  • Frequency
  • Instrumentation
  • Measurement
  • Operating Systems
  • Square Waves
  • Timing Devices
  • United States
  • Waveforms

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computer Science.
  • Electrical Engineering