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A Study Of An Adaptive Aircraft Control System In A Self Organizing Configuration
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Book Synopsis A Study of an Adaptive Aircraft Control System in a Self-organizing Configuration by : Henry Morgan Richarde (Jr)
Download or read book A Study of an Adaptive Aircraft Control System in a Self-organizing Configuration written by Henry Morgan Richarde (Jr) and published by . This book was released on 1969 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: An adaptive control scheme may provide the best approach to the problem of accommodating automatic flight control systems to the variations of dynamic characteristics encountered over the flight envelope of the aircraft. The C*-Criterion for aircraft time response provides a basis for the design of such a system. To provide a margin of safety, all control systems have redundant channels for emergency use. An adaptive control system can be designed to be self-organizing, and in such a configuration can provide its own failure monitoring, resulting in a simpler and more efficient system. This study shows that such a system is feasible, that the response of the system is within the limits set forth in the C*-Criterion, and that the self-organizing characteristics provide reliable operation over the whole range of flight operations. (Author).
Book Synopsis A Study of an Adaptive Aircraft Control System in a Self-organizing Configuration by : Henry Morgan Richarde
Download or read book A Study of an Adaptive Aircraft Control System in a Self-organizing Configuration written by Henry Morgan Richarde and published by . This book was released on 1969 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adaptive and Self Organizing Flight Control Systems by : M. A. Ostgaard
Download or read book Adaptive and Self Organizing Flight Control Systems written by M. A. Ostgaard and published by . This book was released on 1962 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Feasibility Study of Self-learning Adaptive Flight Control for High Performance Aircraft by : Stephen G. Hoppe
Download or read book A Feasibility Study of Self-learning Adaptive Flight Control for High Performance Aircraft written by Stephen G. Hoppe and published by . This book was released on 1967 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Book Synopsis Compilation of Abstracts of Dissertations, Theses and Research Papers Submitted by Candidates for Degrees by : Naval Postgraduate School (U.S.)
Download or read book Compilation of Abstracts of Dissertations, Theses and Research Papers Submitted by Candidates for Degrees written by Naval Postgraduate School (U.S.) and published by . This book was released on 1969 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Self Adaptive Flight Control Systems Symposium by : P. C. Gregory
Download or read book Proceedings of the Self Adaptive Flight Control Systems Symposium written by P. C. Gregory and published by . This book was released on 1959 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Flight Vehicle Self-adaptive Flight Control System by : M. W. Reed
Download or read book Advanced Flight Vehicle Self-adaptive Flight Control System written by M. W. Reed and published by . This book was released on 1962 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
Book Synopsis Self-organizing Radial Basis Function Networks for Adaptive Flight Control and Aircraft Engine State Estimation by : Praveen Shankar
Download or read book Self-organizing Radial Basis Function Networks for Adaptive Flight Control and Aircraft Engine State Estimation written by Praveen Shankar and published by . This book was released on 2007 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The performance of nonlinear control algorithms such as feedback linearization and dynamic inversion is heavily dependent on the fidelity of the dynamic model being inverted. Incomplete or incorrect knowledge of the dynamics results in reduced performance and may lead to instability. Augmenting the baseline controller with approximators which utilize a parametrization structure that is adapted online reduces the effect of this error between the design model and actual dynamics. However, currently existing parameterizations employ a fixed set of basis functions that do not guarantee arbitrary tracking error performance. To address this problem, we develop a self-organizing parametrization structure that is proven to be stable and can guarantee arbitrary tracking error performance. The training algorithm to grow the network and adapt the parameters is derived from Lyapunov theory. In addition to growing the network of basis functions, a pruning strategy is incorporated to keep the size of the network as small as possible. This algorithm is implemented on a high performance flight vehicle such as F-15 military aircraft. The baseline dynamic inversion controller is augmented with a Self-Organizing Radial Basis Function Network (SORBFN) to minimize the effect of the inversion error which may occur due to imperfect modeling, approximate inversion or sudden changes in aircraft dynamics. The dynamic inversion controller is simulated for different situations including control surface failures, modeling errors and external disturbances with and without the adaptive network. A performance measure of maximum tracking error is specified for both the controllers a priori. Excellent tracking error minimization to a pre-specified level using the adaptive approximation based controller was achieved while the baseline dynamic inversion controller failed to meet this performance specification. The performance of the SORBFN based controller is also compared to a fixed RBF network based adaptive controller. While the fixed RBF network based controller which is tuned to compensate for control surface failures fails to achieve the same performance under modeling uncertainty and disturbances, the SORBFN is able to achieve good tracking convergence under all error conditions.
Book Synopsis Applications of Adaptive Control by : Kumpati S. Narendra
Download or read book Applications of Adaptive Control written by Kumpati S. Narendra and published by Elsevier. This book was released on 2012-12-02 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control Applications of Adaptive covers the proceedings of the 197 Workshop on Applications of Adaptive Control, held in Yale University. This book is organized into five parts encompassing 18 chapters that summarize the potential application of adaptive control to many practical problems. Part I contains tutorials that bring together important result s in two of the most studied approaches to adaptive control, namely, self-tuning regulators and model reference adaptive control (MRAC), with a particular emphasis on the importance of error models in the stability analysis of MRAC. Part II examines the algorithms used for adaptive signal processing, while Part III describes the types of power systems problems that could benefit from application of adaptive control and how to apply adaptive control algorithms for controlling large electric generators. Part IV highlights adaptive control in aircraft systems. This part also considers how adaptive control fell into disfavor in the flight control community, illustrating the existence of residual negative bias. The desirability of cost elimination of air data sensors in less-sophisticated flight control systems is also discussed. Part V addresses the application of process control to chemical processes and to electromechanical systems. This part also shows the robustness and superior tracking and regulation properties of model reference adaptive control applied to liquid level control. Discussion on various classes of model reference adaptive controllers in a common framework from the viewpoint of microcomputer implementation is also included. This book will be of value to control system theorists and practitioners.
Download or read book NASA SP. written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Application of Adaptive Learning to Malfunction Recovery by : Robert Edward Cruz
Download or read book An Application of Adaptive Learning to Malfunction Recovery written by Robert Edward Cruz and published by . This book was released on 1985 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: A self-organizing controller is developed for a simplified two-dimensional aircraft model. The controller learns how to pilot the aircraft through a navigational mission without exceeding pre-established position and velocity limits. The controller pilots the aircraft by activating one of eight directional actuators at all times. By continually monitoring the aircraft's position and velocity with respect to the mission, the controller progressively modifies its decision rules to improve the aircraft's performance. When the controller has learned how to pilot the aircraft, two actuators fail permanently. Despite this malfunction, the controller regains proficiency at its original task. The experimental results reported show the controller's capabilities foe self-organizing control, learning, and malfunction recovery.
Book Synopsis Performance Evaluation and Improvement for an Aircraft Flight Control System in which Self-organizing Control Techniques are Used by : Kent LaVerle Copeland (CIVILIAN.)
Download or read book Performance Evaluation and Improvement for an Aircraft Flight Control System in which Self-organizing Control Techniques are Used written by Kent LaVerle Copeland (CIVILIAN.) and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experience with the X-15 Adaptive Flight Control System by :
Download or read book Experience with the X-15 Adaptive Flight Control System written by and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flight tests to determine reliability of X-15 self adaptive flight control system.
Book Synopsis U.S. Government Research Reports by :
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1964 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study to Determine the Feasibility of a Self-optimizing Automatic Flight Control System by : Aeronutronic Ford Corporation
Download or read book A Study to Determine the Feasibility of a Self-optimizing Automatic Flight Control System written by Aeronutronic Ford Corporation and published by . This book was released on 1960 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
