23 research outputs found
The Impact of GPS Velocity Based Flight Control on Flight Instrumentation Architecture
This thesis explores the use of velocity information obtained by a Global Positioning System
(GPS) receiver to close the aircraft’s flight control loop. A novel framework to synthesize
attitude information from GPS velocity vector measurements is discussed. The
framework combines the benefits of high-quality GPS velocity measurements with a novel
velocity vector based flight control paradigm to provide a means for the human operator or
autopilot to close the aircraft flight control loop. Issues arising from limitations in GPS as
well as the presence of a human in the aircraft control loop are addressed.
Results from several flight tests demonstrate the viability of this novel concept and show
that GPS velocity based attitude allows for equivalent aircraft control as traditional attitude.
Two possible applications of GPS velocity based attitude, an autopilot and a tunnelin-
the-sky trajectory guidance system, are demonstrated in flight. Unlike traditional autopilot
and trajectory guidance systems, these applications rely solely on the information
obtained from a single-antenna GPS receiver which makes them affordable to the larger
General Aviation aircraft community. Finally, the impact of GPS velocity based flight control
on the instrumentation architecture of flight vehicles is investigated.Rockwell-Collins, NASA/FAA Joint University Program for Air Transportation, Draper Laborator
Optimal control in the presence of measurement uncertainties
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1967.Vita.Includes bibliographical references (leaves 155-160).by John Jacob Deyst, Jr.Sc.D
Supplier Integration Into Design and Development
Lean Aircraft Initiative Plenary Workshop presentatio
Existing and Required Modeling Capabilities for Evaluating ATM Systems and Concepts
ATM systems throughout the world are entering a period of major transition and change. The combination of important technological developments and of the globalization of the air transportation industry has necessitated a reexamination of some of the fundamental premises of existing Air Traffic Management (ATM) concepts. New ATM concepts have to be examined, concepts that may place more emphasis on: strategic traffic management; planning and control; partial decentralization of decision-making; and added reliance on the aircraft to carry out strategic ATM plans, with ground controllers confined primarily to a monitoring and supervisory role. 'Free Flight' is a case in point. In order to study, evaluate and validate such new concepts, the ATM community will have to rely heavily on models and computer-based tools/utilities, covering a wide range of issues and metrics related to safety, capacity and efficiency. The state of the art in such modeling support is adequate in some respects, but clearly deficient in others. It is the objective of this study to assist in: (1) assessing the strengths and weaknesses of existing fast-time models and tools for the study of ATM systems and concepts and (2) identifying and prioritizing the requirements for the development of additional modeling capabilities in the near future. A three-stage process has been followed to this purpose: 1. Through the analysis of two case studies involving future ATM system scenarios, as well as through expert assessment, modeling capabilities and supporting tools needed for testing and validating future ATM systems and concepts were identified and described. 2. Existing fast-time ATM models and support tools were reviewed and assessed with regard to the degree to which they offer the capabilities identified under Step 1. 3 . The findings of 1 and 2 were combined to draw conclusions about (1) the best capabilities currently existing, (2) the types of concept testing and validation that can be carried out reliably with such existing capabilities and (3) the currently unavailable modeling capabilities that should receive high priority for near-term research and development. It should be emphasized that the study is concerned only with the class of 'fast time' analytical and simulation models. 'Real time' models, that typically involve humans-in-the-loop, comprise another extensive class which is not addressed in this report. However, the relationship between some of the fast-time models reviewed and a few well-known real-time models is identified in several parts of this report and the potential benefits from the combined use of these two classes of models-a very important subject-are discussed in chapters 4 and 7
Principles of Automatic Control
The course deals with introduction to design of feedback control systems, properties and advantages of feedback systems, time-domain and frequency-domain performance measures, stability and degree of stability. It also covers root locus method, nyquist criterion, frequency-domain design, and state space methods
An experimental investigation of the flutter characteristics of low density wings
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1958.MIT copy bound with: An application of beryllium in the designing and testing of a high supersonic flutter model / John W. Brice, Jr. 1958.Includes bibliographical references (leaf 17).by John J. Deyst, Jr.B.S