Accession Number:

ADA137814

Title:

Design of Longitudinal Control Laws for the X-29A Backup Analog Flight Control System.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1983-09-01

Pagination or Media Count:

146.0

Abstract:

X-29 wind tunnel data were input to the computer program TTYLON to produce alphadelta c, Nzdelta c, and qdelta c bare airframe transfer functions throughout the flight envelope. The short period mode below Mach 1 was unstable. Where it was stable, the response was slow. The normal acceleration sensor was placed so that the short period frequency would be within the desired range of 3 to 10 radsec. Nz feedback was used to stabilize the short period mode. Pitch rate feedback was also used to add damping for Level I flying qualities in the short period mode. To stabilize the phugoid mode and achieve Level I flying qualities, a lag filter design was developed. Gain schedules for KNz and Kq, which were found using classical multiloop control law design are presented. Author

Subject Categories:

  • Aircraft
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE