GUIDANCE LOGIC FOR SPIRAL APPROACHES

A spiral approach concept is proposed as a standard procedure for independent, commercial VTOL operations conducted in close proximity to CTOL operations. A guidance logic is developed for this VTOL application, although the results may be applicable to curved approaches by STOL or CTOL aircraft as well. The guidance concept attempts to maintain constant airspeed along a fixed-radius nominal spiral. The presence of wind requires a continuous variation in bank angle and heading rate to remain on the desired path. Linear perturbation analysis is used to select satisfactory feedback gains for commanded bank angle, longitudinal acceleration, and vertical speed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00218669
• Corporate Authors:

  American Institute of Aeronautics and Astronautics

  1290 Avenue of the Americas
  New York, NY  United States  10019
• Authors:
  • Hollister, W M
  • Hoffman, W C
• Publication Date: 1977-10

Media Info

• Pagination: p. 972-980
• Serial:
  • Journal of Aircraft
  • Volume: 14
  • Issue Number: 10
  • Publisher: American Institute of Aeronautics and Astronautics
  • ISSN: 0021-8669
  • Serial URL: https://arc.aiaa.org/journal/ja

Subject/Index Terms

• TRT Terms: Aircraft by type of lift; Airspeed; Approach; Civil aircraft; Descent; Flight paths; Landing; STOL aircraft; VTOL aircraft
• Old TRIS Terms: Ctol aircraft
• Subject Areas: Aviation; Vehicles and Equipment;

Filing Info

• Accession Number: 00173085
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jun 14 1978 12:00AM