00633342

Component

http://onlinepubs.trb.org...trr/1993/1379/1379-001.pdf

https://scholar.google.co...idis&publication_year=1993

A robust controller, using H control design techniques, is developed for a commercial landing system. First a detailed nonlinear aircraft computer simulation of a commercial aircraft is summarized. The computer simulation, which includes the aircraft flight dynamics, pitch attitude autopilot, and automatic thrust compensator, is presented for a Boeing 737 aircraft. The aircraft simulation is first derived by using a full 6-degree-of-freedom rigid-body model. The model is then increased to include the pitch autopilot and automatic thrust compensator. The control variables for these systems are the elevator, which generally controls pitch angle, and the thrust, which generally controls airspeed. A detailed digital computer simulation allows the replacement of simplified transfer function models for use in an autoland simulation. Therefore, internal states and dynamics associated with the aircraft subsystems can be evaluated. Then, a linear model is used to design a robust controller for the autoland process. The robustness of this controller, with respect to parameter and structural uncertainties, is tested with the aircraft simulation. The design study indicates that this controller dramatically improves the response characteristics and performance of the autoland system.

This paper appears in Transportation Research Record No. 1379, Public-Sector Aviation Issues: Graduate Research Award Papers 1991-1992. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01405138

English

p. 1-8

1993

Transportation Research Record

0309054230

Figures (8) ; References (25)

Performance; Simulation

Boeing 737 aircraft

Aviation; Highways; Vehicles and Equipment

TRIS, TRB

Jun 25 1993 12:00AM

• DEVELOPMENT OF RISK MODELS FOR SIMULTANEOUS INSTRUMENT LANDING SYSTEM APPROACHES TO CLOSELY SPACED PARALLEL RUNWAYS
• POLICY-LEVEL DECISION SUPPORT FOR AIRPORT PASSENGER TERMINAL DESIGN
• REEXAMINATION OF STALL AND SPIN PREVENTION TRAINING
• RESPONSE OF U.S. AIR CARRIERS TO ON-TIME DISCLOSURE RULE