The Interpretation of Flying Qualities Requirements for Flight Control System Design
The Interpretation of Flying Qualities Requirements for Flight Control System Design

Author:

Publisher:

Published: 1985

Total Pages: 94

ISBN-13:

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A study was conducted to design an experimental flight test program for the Total In-Flight Simulator CTIFS) directed toward the interface between flying qualities requirements and flight control system design criteria. The eventual goal is to provide an interpretation or translation of flying qualities requirements for use by the flight control system designer. Specifically, an angle of attack and pitch rate command system matrix involving both short term and long term dynamics are specified for evaluation. A major objective of the research was to demonstrate that flying qualities criteria and flight control system configuration or architecture can be independent. Finally, additional configurations are proposed to evaluate the efficacy of dynamic decoupling.

Advances In Aircraft Flight Control
Advances In Aircraft Flight Control

Author: MB Tischler

Publisher: Routledge

Published: 2018-04-24

Total Pages: 750

ISBN-13: 1351468448

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This book provides a single comprehensive resource that reviews many of the current aircraft flight control programmes from the perspective of experienced practitioners directly involved in the projects. Each chapter discusses a specific aircraft flight programme covering the control system design considerations, control law architecture, simulation and analysis, flight test optimization and handling qualities evaluations. The programmes described have widely exploited modern interdisciplinary tools and techniques and the discussions include extensive flight test results. Many important `lessons learned' are included from the experience gained when design methods and requirements were tested and optimized in actual flight demonstration.

Design Criteria for the Future of Flight Controls
Design Criteria for the Future of Flight Controls

Author: S. G. Fuller

Publisher:

Published: 1982

Total Pages: 726

ISBN-13:

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Proceedings are reported of a symposium held in Dayton, sponsored by the Flight Dynamics Laboratory during 2-5 March 1982. The symposium was planned and ran by the Flight Control Division, specifically the Flying Qualities Group and the Control Techniques Group as part of an ongoing effort to revise and upgrade both MIL-F-8785C, Military Specification, Flying Qualities of Piloted Airplanes, and MIL-F-9490D, Flight Control System-Design, Installation and Test of Piloted Aircraft, General Specification For. Specialists from both the flying qualities and flight control system disciplines were gathered in Dayton from both industry and government agencies. Formal and informal presentations, plus workshop discussions, were structured around proposed draft versions of the new Flying Qualities MIL-Standard and Handbook and the new Flight Control Systems MIL-Specification and Handbook. This report contains a record of the presentations and discussions as submitted by the individual authors.

Flight Control Systems
Flight Control Systems

Author: Roger Pratt

Publisher: IET

Published: 2000

Total Pages: 416

ISBN-13: 9780852967669

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Annotation Bridging the gap between academic research and real-world applications, this reference on modern flight control methods for fixed-wing aircraft deals with fundamentals of flight control systems design, then concentrates on applications based on the modern control methods used in the latest aircraft. The book is written for practicing engineers who are new to the aviation industry, postgraduate students in strategic or applied research, and advanced undergraduates. Some knowledge of classical control is assumed. Pratt is a member of IEEE and is UK Member for AIAA's Technical Committee on Guidance, Navigation and Control. Annotation c. Book News, Inc., Portland, OR (booknews.com)

Analysis of Digital Flight Control Systems with Flying Qualities Applications
Analysis of Digital Flight Control Systems with Flying Qualities Applications

Author: Richard F. Whitbeck

Publisher:

Published: 1978

Total Pages: 32

ISBN-13:

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Revisitation and extension of classical sampled data approaches for the analysis of discretely controlled continuous systems is the focus of this report. A review of basic linear analysis topics required to support later developments is given. These topics include Laplace, z- and advanced z-transform facts; partial fraction expansion; data holds and the switch decomposition technique. Extension of switch decomposition for the vector signal case is given. A new direct transform domain approach for analyzing two-rate sampled systems is developed. This approach also applies for multi-rate sampled systems in restricted circumstances. Utility of this approach resides in its operator notation and conventions for manipulation in connection with vector block diagram algebra. This, in turn, expedites development of pulse transfer functions and of response recursion relations for multivariable, closed-loop systems. This is accomplished without resorting to the more complicated switch decomposition method. Multi-rate sampling analysis procedures are used to sharpen the concept of 'frequency response' for discretely excited, continuous systems. All methods of analysis presented in this report are closed-form and exact in that no approximation is required in the mathematical development of any result.

Volume II. Flying Qualities Phase. Chapter 14: Flight Control Systems
Volume II. Flying Qualities Phase. Chapter 14: Flight Control Systems

Author:

Publisher:

Published: 1988

Total Pages: 311

ISBN-13:

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The study of flight control systems is of central importance in the design and flight test of modern aircraft. Increasingly these aircraft are designed with performance considerations only and sophisticated flight control systems are required to correct a host of handling qualities deficiencies. Today's complex control systems are comprised of various elements, washout filters, prefilters, sensors, electronic compensators and structural filters, in full authority fly-by-wire systems. The purpose of this course is to provide a fundamental understanding of the basic types of aircraft control strategies. Simple mechanical systems are presented including the effect of control system elements, such as actuators, artificial feel systems, and mechanical elements. Stability and control augmentation systems are then discussed, stressing the advantages and disadvantages of each type of feedback commonly used. Electronic compensators are studied as further refinements to the augmented system. Modern analog and digital electronic flight control systems are then analyzed to gain an appreciation for their operation and potential handling qualities deficiencies. In addition, automatic flight control systems are discussed including both autopilots and the more sophisticated integrated systems for automated maneuvering. Aircraft sensors used in most of these flight control systems are also analyzed. Finally, flight control system test techniques are presented.

Advances in Flying Qualities
Advances in Flying Qualities

Author: ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)

Publisher:

Published: 1988

Total Pages: 191

ISBN-13:

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Judging the suitability of an aircraft to safely and effectively perform its mission without undue pilot skill and discomfort is what flying qualities is all about. Central to such judgement, and to the design of suitable aircraft plus flight control systems, is an understanding of what the pilot can do with ease and comfort or conversely what bothers him. The Lectures are designed to impart such understanding to both novice and seasoned practioners in flying qualities and flight control and thereby to provide the bridge required to extend flying qualities requirements from simple classic response aircraft, to the responses attending the use of full-time active control. It also provides a unifying connection among the empirically derived flying qualities requirements of different aircraft types, e.g. fixed and rotary wing. Mathematical models of pilot control behavior are explained. For purposes of ready and universal characterization, the aircraft plus flight control system (plus displays if applicable), is approximately matched by a lower order equivalent system of sufficient bandwidth to be indicative of the pilot's concerns. Some of the pitfalls and benefits of using flight simulators for flight control system development and flying qualities research are exposed and clarified. Keywords: Flight characteristics; Human factors engineering; France. (sdw).

An In-Flight Investigation to Develop Control System Design Criteria for Fighter Airplanes
An In-Flight Investigation to Develop Control System Design Criteria for Fighter Airplanes

Author: T. P. Neal

Publisher:

Published: 1970

Total Pages: 152

ISBN-13:

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The effects of control system dynamics on the longitudinal flying qualities of fighter airplanes were investigated in flight, using the USAF/CAL variable stability T-33 airplane. Two pilots evaluated a total of 57 different combinations of control system and short-period dynamics at two flight conditions, while performing tasks representative of the 'combat' phase of a fighter's mission. The pilot rating and comment data from this investigation indicate that the dynamic modes of the flight control system can cause serious flying qualities problems, even if the short-period mode is well behaved. The data do not correlate with the control system requirements of MIL-F-8785B. In addition, the data demonstrate that the C* criterion does not adequately account for the effects of control system dynamics. Pilot-in-the-loop analysis of the data is shown to describe effectively the pilot's difficulties in control of pitch attitude, providing insight into how the pilot flies the airplane. A design criterion, based on this analysis, is shown to be applicable to a wide range of short-period and control system dynamics. A simplified version is also presented to provide the designer with preliminary estimates of flying qualities.

Initial VTOL Flight Control Design Criteria Development - Discussion of Selected Handling Qualities Topics
Initial VTOL Flight Control Design Criteria Development - Discussion of Selected Handling Qualities Topics

Author: John Kroll (Jr.)

Publisher:

Published: 1968

Total Pages: 76

ISBN-13:

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"This report presents a series of discussions on selected topics related to the development of VTOL flying qualities criteria. The topics were chosen on the basis of their importance to flying qualities and the potential significance to the Air Force VTOL Integrated Flight Control System (VIFCS) program. The treatment given to the selected topics was aimed at identifying those areas that require further study and research within the scope of the VIFCS program. -- page iii.