Analytical Sensor Redundancy Assessment

Details

• Creators:
  Mulcare, D. B. ; Downing, L. E. ; Smith, M. K.
• Corporate Creators:
  Lockheed-California Company
• Corporate Contributors:
  United States. Department of Transportation. Federal Aviation Administration. Technical Center
• Subject/TRT Terms:
  • Aerodynamic stability
  • Airplanes
  • Control systems
  • Fault tolerant computing
• Publication/ Report Number:
  DOT/FAA/CT-86/32
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center
• Abstract:
  The rationale and mechanization of sensor fault tolerance based on analytical redundancy principles are described. The concept involves the substitution of software procedures, such as an observer algorithm, to supplant additional hardware components. The observer synthesizes values of sensor states in lieu of their direct measurement. Such information can then be used, for example, to determine which of two disagreeing sensors is more correct, thus enhancing sensor fault survivability. Here a stability augmentation system is used as an example application, with required modifications being made to a quadruplex digital flight control system. The impact on software structure and the resultant revalidation effort are illustrated as well. Also, the use of an observer algorithm for wind gust filtering of the angle-of-attack sensor signal is presented.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/92812/dot_92812_DS1.pdf
• File Type:
  [PDF - 1.02 MB]
• Collection(s):
  FAA William J. Hughes Technical Center for Advanced Aerospace
• Main Document Checksum:
  urn:sha-512:9744c1089fa1bec0d9797ef425c6faf3d19ea1e41666b060ad8503d21122ec63f38356592ce4098587ee0add1f850b4e11ac34f4deba5d4df6d339c2159cd708