Development of an Advanced Digital Adaptive Flight Control System
Development of an Advanced Digital Adaptive Flight Control System

Author: John Zaborszky

Publisher:

Published: 1964

Total Pages: 161

ISBN-13:

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A new approach for a digital adaptive flight control system was developed. This approach consists of an explicit identification of the vehicle transfer function coefficients coupled with a control system parameter optimization to minimize an integral square error type criterion of performance. The investigation included theoretical studies which further developed the identification and parameter adjustment equations and established their effectiveness and the limits within which they are effective. These theoretical studies also established methods for the numerical integration which is needed in the identification and a search technique which is needed in the parameter adjustment process. Working equations which were used in the programming for the digital studies are included. The extensive all-digital and the hybrid simulation set up for this study is described. The all-digital simulation was useful in testing the sensitivity of the identification and parameter adjustment by taking numerous short runs under varying conditions. The hybrid simulation permitted testing the proposed methods in conjunction with realistic airframes in actual closed autopilot loops on realistic trajectories.

Digital Adaptive Flight Controller Development
Digital Adaptive Flight Controller Development

Author: Howard Kaufman

Publisher:

Published: 1974

Total Pages: 132

ISBN-13:

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A design study of adaptive control logic suitable for implementation in modern airborne digital flight computers was conducted. Two designs are described for an example aircraft. Each of these designs uses a weighted least squares procedure to identify parameters defining the dynamics of the aircraft. The two designs differ in the way in which control law parameters are determined. One uses the solution of an optimal linear regulator problem to determine these parameters while the other uses a procedure called single stage optimization. Extensive simulation results and analysis leading to the designs are presented.

A Feasibility Study of Self-learning Adaptive Flight Control for High Performance Aircraft
A Feasibility Study of Self-learning Adaptive Flight Control for High Performance Aircraft

Author: Stephen G. Hoppe

Publisher:

Published: 1967

Total Pages: 258

ISBN-13:

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A study of the feasibility of a self-learning adaptive system for the flight control of high performance aircraft has been performed. A flight control system was developed for the investigation of the stability augmentation of the longitudinal axis of the F101B aircraft using self-learning adaptive control. The learning adaptive controller developed employs a three-loop concept. The innermost loop comprises a linear feedback control system in which a set of control gains is adjusted by a second (adaptive) loop employing a parameter identifier and a trainable function generator (automation). The automation provides the correct values of feedback gain in response to patterns derived from the identified aircraft parameters. The third loop (the learning loop) measures control system performance, and continually retrains the automation to improve the performance. Experiments were performed with a digital simulation of the aircraft and the learning adaptive control system. Results of the experiments indicate that learning adaptive control is feasible. However, a number of significant technical problems must be overcome prior to the use of such a control system in tactical aircraft. Studies of sensitivity must be performed to assess the effect of small perturbations in the identification parameters on system performance. Extended studies of property extraction from the identified parameters is required, and means for further simplifying the control structure is of importance in a real system. (Author).

Automatic Flight Control Systems
Automatic Flight Control Systems

Author: Thomas Lombaerts

Publisher: BoD – Books on Demand

Published: 2012-01-18

Total Pages: 218

ISBN-13: 9533078162

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The history of flight control is inseparably linked to the history of aviation itself. Since the early days, the concept of automatic flight control systems has evolved from mechanical control systems to highly advanced automatic fly-by-wire flight control systems which can be found nowadays in military jets and civil airliners. Even today, many research efforts are made for the further development of these flight control systems in various aspects. Recent new developments in this field focus on a wealth of different aspects. This book focuses on a selection of key research areas, such as inertial navigation, control of unmanned aircraft and helicopters, trajectory control of an unmanned space re-entry vehicle, aeroservoelastic control, adaptive flight control, and fault tolerant flight control. This book consists of two major sections. The first section focuses on a literature review and some recent theoretical developments in flight control systems. The second section discusses some concepts of adaptive and fault-tolerant flight control systems. Each technique discussed in this book is illustrated by a relevant example.

Advances in Flight Control Systems
Advances in Flight Control Systems

Author: Maria Agneta Balint

Publisher: BoD – Books on Demand

Published: 2011-04-11

Total Pages: 314

ISBN-13: 9533072180

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Nonlinear problems in flight control have stimulated cooperation among engineers and scientists from a range of disciplines. Developments in computer technology allowed for numerical solutions of nonlinear control problems, while industrial recognition and applications of nonlinear mathematical models in solving technological problems is increasing. The aim of the book Advances in Flight Control Systems is to bring together reputable researchers from different countries in order to provide a comprehensive coverage of advanced and modern topics in flight control not yet reflected by other books. This product comprises 14 contributions submitted by 38 authors from 11 different countries and areas. It covers most of the currents main streams of flight control researches, ranging from adaptive flight control mechanism, fault tolerant flight control, acceleration based flight control, helicopter flight control, comparison of flight control systems and fundamentals. According to these themes the contributions are grouped in six categories, corresponding to six parts of the book.

ADVANCED CONTROL SYSTEM CONCEPTS.
ADVANCED CONTROL SYSTEM CONCEPTS.

Author: R. K. Smyth

Publisher:

Published: 1968

Total Pages: 202

ISBN-13:

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Contents: Survey of adaptive control applications to aerospace vehicles; Case for adaptive control; Theoretical perspective of adaptive control techniques and modern control theory; Primary flight control circuit development from mechanical systems to an all-electric digital signalling system; Fly-by-wire flight control systems; The impact of electronic displays on aircraft control; The place of adaptive control techniques in the future development of automatic flight control systems; Systemes a commande adaptable; Adaptive control of flexible aircraft structural modes; A response regulation technique for self-adaptive control of flexible aircraft; Flight test experience with adaptive control systems; Self adaptive manoeuvre demand control systems--some practical design considerations; Essais de systemes auto-adaptables sur Mirage III; Safety and reliability for all-weather landing systems; The influence of system reliability of accident hazards due to poor handling qualities; VTOL IFR technology program; Control function selection and monitoring.

Advanced Control of Aircraft, Spacecraft and Rockets
Advanced Control of Aircraft, Spacecraft and Rockets

Author: Ashish Tewari

Publisher: John Wiley & Sons

Published: 2011-06-01

Total Pages: 416

ISBN-13: 1119972744

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Advanced Control of Aircraft, Spacecraft and Rockets introduces the reader to the concepts of modern control theory applied to the design and analysis of general flight control systems in a concise and mathematically rigorous style. It presents a comprehensive treatment of both atmospheric and space flight control systems including aircraft, rockets (missiles and launch vehicles), entry vehicles and spacecraft (both orbital and attitude control). The broad coverage of topics emphasizes the synergies among the various flight control systems and attempts to show their evolution from the same set of physical principles as well as their design and analysis by similar mathematical tools. In addition, this book presents state-of-art control system design methods - including multivariable, optimal, robust, digital and nonlinear strategies - as applied to modern flight control systems. Advanced Control of Aircraft, Spacecraft and Rockets features worked examples and problems at the end of each chapter as well as a number of MATLAB / Simulink examples housed on an accompanying website at http://home.iitk.ac.in/~ashtew that are realistic and representative of the state-of-the-art in flight control.