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) : Emrick,H L

PDF Url : ADA137814

Report Date : Sep 1983

Pagination or Media Count : 146

Abstract : X-29 wind tunnel data were input to the computer program TTYLON to produce alpha/delta c, Nz/delta c, and q/delta 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 rad/sec. 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)

Descriptors :   *Flight control systems, Computer aided design, Experimental design, Analog systems, Control simulators, Wind tunnel tests, Attitude control systems, Feedback, Theses, Computer programs

Subject Categories : Aircraft
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE