Download or read book A Robust Rotorcraft Flight Control System Design Methodology Utilizing Quantitative Feedback Theory written by Peter James Gorder and published by . This book was released on 1993 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Robust Digital Flight Control System for an Unmanned Research Vehicle Using Discrete Quantitative Feedback Theory written by and published by . This book was released on 1991 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes application of digital multiple-input multiple- output (MIMO) Quantitative Feedback Theory (QFT) technique to the design of a three axis rate controller for the Lambda Unmanned Research Vehicle. The resulting robust controller performs well throughout the flight envelope without gain scheduling. It results from research done at the Air Force Institute of Technology. The Lambda URV was designed by the Control Systems Development Branch of the Wright Laboratory at Wright-Patterson AFB, OH for flight testing aircraft control hardware and software. The flight control system is built using a small perturbation linear model developed from flight test data. The actuators, also modelled from aircraft test data, are second order in roll and pitch and first order in yaw. Nineteen separate plants are used to represent the flight envelope of the aircraft resulting from variations in speed, altitude, center of gravity location, and weight. The sample rate is 50 Hertz. The pitch channel is decoupled from the lateral-directional resulting in a single-input single-output (SISO) system for the pitch channel and a two-by-two MIMO system for the lateral-directional channel. The design employs the Nichols Chart and is accomplished in the w'-domain.

Download or read book Rotorcraft Flight Control Design Using Quantitative Feedback Theory and Dynamic Crossfeeds written by Rendy P. Cheng and published by . This book was released on 1995 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Feedback Theory QFT Applied to the Design of a Rotorcraft Flight Control System written by R. A. Hess and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Robust Multivariable Flight Control written by Richard J. Adams and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manual flight control system design for fighter aircraft is one of the most demanding problems in automatic control. Fighter aircraft dynamics generally have highly coupled uncertain and nonlinear dynamics. Multivariable control design techniques offer a solution to this problem. Robust Multivariable Flight Control provides the background, theory and examples for full envelope manual flight control system design. It gives a versatile framework for the application of advanced multivariable control theory to aircraft control problems. Two design case studies are presented for the manual flight control of lateral/directional axes of the VISTA-F-16 test vehicle and an F-18 trust vectoring system. They demonstrate the interplay between theory and the physical features of the systems.

Download or read book Quantitative Feedback Theory QFT written by Constantine H. Houpis and published by . This book was released on 1987 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Feedback Theory written by Constantine H. Houpis and published by CRC Press. This book was released on 1999-08-27 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the interface between the technical literature's theoretical results and the problems that practising engineers face - and that engineering students will face - every day on the job. It demonstrates the extensive applications of quantitative feedback theory and seeks to bridge the gap between theory and practice. The book contains a user's manual and QFT design program on CD-ROM, to provide faster, easier access to design applications.

Download or read book Design of a Flight Controller for an Unmanned Research Vehicle with Control Surface Failures Using Quantitative Feedback Theory written by and published by . This book was released on 1993 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the application of the multiple-input multiple- output (MIMO) Quantitative Feedback Theory (QFT) design technique to the design of a digital flight control system for the Lambda Unmanned Research Vehicle (URV). The QFT technique allows the synthesis of a control system which is robust in the presence of structured plant uncertainties. Uncertainties considered in this design are the aircraft's plant variation within the flight envelope and the effects of damage to aircraft control surfaces. Mathematical models of control surface failure effects on aircraft dynamics are derived and used to modify an existing small perturbation model of the Lambda. The QFT technique is applied to design a control system utilizing aircraft pitch rate, roll rate and sideslip angle as feedback variables. The inherent cross-coupling rejection qualities of QFT and an aileron-rudder interconnect are utilized to design a control system which results in a coordinated flight. An outer-loop autopilot is then designed around the QFT controller to further assist turn coordination. Sensor noise effects on aircraft states are also analyzed. Quantitative feedback theory, Flight control system, Aircraft damage.

Download or read book Design of Flight Control Laws for Aircraft with Flexible Wings Using Quantitative Feedback Theory written by Christina L. Osmon and published by . This book was released on 1995 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stability and Control of Aircraft Systems written by Roy Langton and published by John Wiley & Sons. This book was released on 2006-11-02 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the current climate of increasing complexity and functional integration in all areas of engineering and technology, stability and control are becoming essential ingredients of engineering knowledge. Many of today’s products contain multiple engineering technologies, and what were once simple mechanical, hydraulic or pneumatic products now contain integrated electronics and sensors. Control theory reduces these widely varied technical components into their important dynamic characteristics, expressed as transfer functions, from which the subtleties of dynamic behaviours can be analyzed and understood. Stability and Control of Aircraft Systems is an easy-to-read and understand text that describes control theory using minimal mathematics. It focuses on simple rules, tools and methods for the analysis and testing of feedback control systems using real systems engineering design and development examples. Clarifies the design and development of feedback control systems Communicates the theory in an accessible manner that does not require the reader to have a strong mathematical background Illustrated throughout with figures and tables Stability and Control of Aircraft Systems provides both the seasoned engineer and the graduate with the know-how necessary to minimize problems with fielded systems in the area of operational performance.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Flight Control System Reconfiguration Design Using Quantitative Feedback Theory written by P. B. Arnold and published by . This book was released on 1984 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative theory is used to develop control laws for the AFTI/F-16 with a reconfigurable flight control system. Compensators are synthesized to control pitch rate and roll rate through individually controlled elevators and flaperons. Robust control of these variables is required over a larger portion of the flight envelope despite flight control surface failures. Linearized aerodynamic data are used to develop the aircraft model in state-variable format. The longitudinal and lateral-directional equations are coupled in the control matrix. Individual control of the elevators and flaperons is obtained by dividing the dimensionalized control derivatives for a control surface pair in half and assigning each surface of the pair one-half of the total derivative value. The system with individually controlled surfaces represents a four input-two output system which is transformed into an equivalent two input-two output system for each control surface configuration and flight condition. Quantitative feedback theory is then applied to the equivalent systems. Originator-supplied keywords included: Inherent Reconfiguration; Loop Transmission; Flight control Systems; Quantitative Feedback Theory; Control Systems; Computer Programs; Theses.

Download or read book Robust and Reconfigurable Flight Control System Design written by Wichai Siwakosit and published by . This book was released on 2001 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Integrated Approach to Flight Control System Design written by Christopher Simon Beaverstock and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A closely integrated Flight Control System (FCS) design is fundamental to the successful develop- ment of modern aircraft. The FCS must provide adequate control authority to the pilot operator, along with a robust systems design that provides sufficient reliability and performance to ensure ad- equate handling qualities throughout the operational flight envelope. Using feedback controllers, the static and dynamic characteristics can be augmented, ultimately to improve the performance. In- cluding feedback control into the conceptual design process can in many cases improve not only the static and dynamic performance, but the operational efficiency. Essentially, the stability requirements are relaxed, where the additional parameters supplied by the controller are used to recover the lost performance. Furthermore, this is bounded by the performance of the command-actuation system. Parameters such as rate and maximum actuation output limit the systems designs performance, as well as the system dynamics which modifies the response. This thesis considers the task of integrating classical control and systems design under a single design framework. It is shown that by expanding the design space parameters, the overall aircraft perfor- mance and efficiency can be improved. The intended application of these methods is for integration into the conceptual design phase, where commitment of resources is normally at its greatest. Prin- ciples of this thesis are embodied in the FCS design environment Flight Control Systems Designer Toolkit (FCSDT), a sub-component of the Computerised Environment for Aircraft Synthesis and In- tegrated Optirnisation Methods (CEASIOM) software framework developed by Simulation of aircraft Stability And Control (SimSAC), an European Union (EU) funded Framework 6 Program, of which the author was a part of the development team. It is hypothesised that the FCS topology, systems architecture and control design are intrinsically linked, and that modifying these concurrently can lead to an improved design. This is demon- strated using data for a Boeing 747-100 published by National Aeronautics and Space Adminis- tration (NASA), selected due to the wealth of data and information available. Furthermore, with multiply-redundant surfaces and varying response and control power characteristics, provides a non- trivial example for FCS design. The NASA model was used to investigate static and dynamic per- formance across the operational ftight envelope. FCSDT was then used to explore the interaction between the topology and systems design whilst integrating feedback control. Results show the pos- sible performance benefits of. and the system limitations on. the control system design.

Download or read book Robust Multivariable Control of Aerospace Systems written by Declan Bates and published by IOS Press. This book was released on 2002 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classical design and analysis techniques, many of which date back to the 1950's, are still predominantly used in the aerospace industry for the design and analysis of automatic flight control and aero-engine control systems. The continued success and popularity of these techniques is particularly impressive considering the radical advances in aircraft and spacecraft design and avionics technology made over this period. Clearly, an understanding of both the advantages and limitations of these methods is essential in order to properly evaluate the likely usefulness of more modern techniques for the design and analysis of aerospace control systems. One of the themes of this book is that the multivariable robust control methods it describes are logical and natural extensions of the more classical methods, and not replacements for them. It is assumed that readers of this publication are already familiar with classical flight control techniques. Emphasis is on the philosophy, advantages and limitations of the classical approach to flight control system design and analysis. Abstracted in Inspec

Download or read book Robust Flight Control Using Quantitative Feedback Theory written by N.W. Radcliffe and published by . This book was released on 1997 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: