Download or read book Design and Evaluation of a Digital Flight Control System for the FROG Unmanned Aerial Vehicle written by Christopher H. Flood and published by . This book was released on 2001-09-01 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of unmanned aerial vehicles (UAVs) to current and future military operations cannot be understated. This rapidly developing field requires the ability to quickly develop and evaluate advanced control concepts. The FROG UAV serves as a test bed for advanced control and sensor projects at the Naval Postgraduate School. Previous control system projects have made use of a low performance electromechanical autopilot onboard the UAV. This autopilot imposed significant limitations on the responsiveness of the FROG. This project developed and tested an off board digital flight control system for use in lieu of the previous electromechanical device. The digital flight controller was developed using the Matrixx rapid prototyping system and a previously validated dynamic model of the FROG. Surrogate flight control servo actuators were characterized in the laboratory and added to the plant model. Classic inner/ outer loop controllers were developed for yaw damping and speed, altitude and heading control. The system was then successfully demonstrated%ted with hardware in the loop in the lab. The FROG was then instrumented and a command uplink latency of 170 MS was discovered. This introduced excessive phase lag into the system, which drove the flight controllers unstable. An alternate serial uplink method was developed and tested which reduced the command latency to 76 MS however the remaining phase lag resulted in limit cycle oscillation. Laboratory tests indicated that the current flight controller could withstand a maximum of 50 MS command path delay; without modification.

Download or read book Design and Integration of a Flight Management System for the Unmanned Air Vehicle Frog written by Timothy C. Rivers and published by . This book was released on 1998-12-01 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this thesis is to design, integrate and flight test a Flight Management System (FMS) for the computer control of an unmanned air vehicle (UAV). By combining modern control design techniques and the capabilities of a Rapid Prototyping System (RPS), we were able to safely go from concept to flight test in a relatively short amount of time without sacrificing thoroughness in computer simulation, code validation and verification, or hardware-in-the-loop ground testing. This ability to quickly field new or modified flight control systems for UAV's is of ever increasing importance as Department of Defense places greater emphasis on the use of UAV's in widely varying mission areas. The primary focus of this thesis is on the design and testing of a heading controller. However, to fully integrate this into the FMS, the research and testing includes airspeed and altitude controllers designed by previous thesis students. Also included as part of the implementation process, is a thorough sensor evaluation to ensure the controller inputs are adequate to support the FMS. The design and test equipment include a highly modified FROG UAV from the U.S. Army, the MATRIX Product Family of software tools developed by Integrated Systems, Inc., and a Ground Station built at NPS from commercially available computer and communication equipment.

Download or read book Design and Evaluation of a LQR Controller for the Bluebird Unmanned Air Vehicle written by Brian T. Foley and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The modern aerospace controls engineer is provided with a variety of powerful tools to aid in the design and testing of digital flight control systems. The current fiscal environment requires extensive validation of all aerospace based systems through simulation and hardware-in-the-loop testing prior to implementation. This work explores the design and evaluation of an Automatic Flight Control System (AFCS) for the Bluebird Unmanned Aerial Vehicle (UAV). Software tools such as MATLAB and MATRIXx are used to evaluate the dynamic stability of the aircraft model and Linear Quadratic Gaussian algorithms are used to obtain the appropriate controller. Graphical design applications such as SIMULINK and SystemBuild are then used to build a visual block diagram model of the aircraft dynamics and link it with the designed controller. Using this model, the control system response to commanded inputs and external disturbances was evaluated.

Download or read book Design and Evaluation of a LQR Controller for the Bluebird Unmanned Air Vehicle written by Brian T. Foley and published by . This book was released on 1994 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The modern aerospace controls engineer is provided with a variety of powerful tools to aid in the design and testing of digital flight control systems. The current fiscal environment requires extensive validation of all aerospace based systems through simulation and hardware-in-the-loop testing prior to implementation. This work explores the design and evaluation of an Automatic Flight Control System (AFCS) for the Bluebird Unmanned Aerial Vehicle (UAV). Software tools such as MATLAB and MATRIXx are used to evaluate the dynamic stability of the aircraft model and Linear Quadratic Gaussian algorithms are used to obtain the appropriate controller. Graphical design applications such as SIMULINK and SystemBuild are then used to build a visual block diagram model of the aircraft dynamics and link it with the designed controller. Using this model, the control system response to commanded inputs and external disturbances was evaluated.

Download or read book Flight Control System Design and Avionics for Unmanned Aerial Vehicle written by Takahiro Ishige and published by . This book was released on 2002 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fault tolerant Flight Control and Guidance Systems written by Guillaume J. J. Ducard and published by Springer Science & Business Media. This book was released on 2009-05-14 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a complete overview of fault-tolerant flight control techniques. Discussion covers the necessary equations for the modeling of small UAVs, a complete system based on extended Kalman filters, and a nonlinear flight control and guidance system.

Download or read book Design and Rapid Prototyping of Flight Control and Navigation System for an Unmanned Aerial Vehicle written by Bock Aeng Lim and published by . This book was released on 2002-03-01 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work in this thesis is in support of a larger research effort to implement a cluster of autonomous airborne vehicles with the capability to conduct coordinated flight maneuver planning and to perform distributed sensor fusion, Specifically, it seeks to design and implement an onboard flight control and navigation system for NPS FROG UAV, which will be used as the autonomous airborne vehicle for the research, using the newly marketed xPC Target Rapid Prototyping System from The Mathworks, Inc Part I briefly introduces the aircraft and explains the necessity for an onboard computer for the UAV. Part II describes the construction of the miniature aircraft computer, INS/GPS and air data sensor integration implementation as well as the rapid prototyping process. Part III covers the process to create a 6DOF model for the aircraft and the design of the aircraft autopilot, while Part IV presents a vision-based navigation algorithm that can be implemented on the UAV to give it some form of autonomous flight trajectory planning capability. Preliminary ground test results are presented in Part V to conclude this study.

Download or read book Evaluation of a Digital Flight Controller for a Flexible Fighter Aircraft written by M. L. Hoffman and published by . This book was released on 1982 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis evaluates the effect of a digital flight controller on a flexible-fighter aircraft (FFA) at 0.8 Mach at 30,000. The two maneuvers incorporated in this flight controller are the g-command pull-up and the pitch-pointing maneuvers. Using a control law based on the control system theory developed by Brian Porter, a digital flight controller is first designed for a rigid body aircraft, and is then used on the FFA. This thesis evaluates the effect of the controller for the rigid body design when used on the flexible-fighter. The results showed excellent performance by the FFA. The flexible-fighter model is based on the rigid body dynamics of the AFTI/F-16 combined with the first bending mode of a flexible aircraft. The bending mode of the FFA was selected to correspond to expected characteristics in a typical fighter aircraft. Incorporating a time delay in the controller to represent the expected microprocessor computational time delay did not significantly affect the simulation time response of either the rigid body or the FFA. The Neal-Smith criterion is used to determine the acceptance of the design by a pilot.

Download or read book Robust Discrete Time Flight Control of UAV with External Disturbances written by Shuyi Shao and published by Springer Nature. This book was released on 2020-09-26 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book studies selected discrete-time flight control schemes for fixed-wing unmanned aerial vehicle (UAV) systems in the presence of system uncertainties, external disturbances and input saturation. The main contributions of this book for UAV systems are as follows: (i) the proposed integer-order discrete-time control schemes are based on the designed discrete-time disturbance observers (DTDOs) and the neural network (NN); and (ii) the fractional-order discrete-time control schemes are developed by using the fractional-order calculus theory, the NN and the DTDOs. The book offers readers a good understanding of how to establish discrete-time tracking control schemes for fixed-wing UAV systems subject to system uncertainties, external wind disturbances and input saturation. It represents a valuable reference guide for academic research on uncertain UAV systems, and can also support advanced / Ph.D. studies on control theory and engineering.

Download or read book Design and Flight Test of a Digital Flight Control System for General Aviation Aircraft written by John A. Foxgrover and published by . This book was released on 1982 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Drone Development from Concept to Flight written by Sumit Sharma and published by Packt Publishing Ltd. This book was released on 2024-04-30 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn and apply the principles behind building and flying drones using components like BLDC motors and speed controllers, AeroGCS ground software, Ardupilot and PX4 open-source flight stacksalong with examples and best practices Key Features Get to grips with multicopter physics (roll, pitch, and yaw) and 3D dynamics for defining a drone's flight Optimize drone performance with powerful propulsion systems such as BLDS motors, lipo batteries, and ESCs Build a custom survey drone to learn vital aspects of drone assembly, configuration, testing, and maiden flight Purchase of the print or Kindle book includes a free PDF eBook Book DescriptionUnlock opportunities in the growing UAV market where drones are revolutionizing diverse sectors like agriculture, surveying, and the military. Using the vast experience of the author in drone domain, this book provides step-by-step guidance through the complete drone development life cycle, from concept to pilot stage, prototyping, and ultimately, a market-ready product, with domain-specific applications. Starting with an introduction to unmanned systems, principles of drone flight, and it's motion in 3D space, this book shows you how to design a propulsion system tailored to your drone’s needs. You’ll then get hands on with the entire drone assembly process, covering airframe, components, and wiring. Next, you’ll enhance drone connectivity and navigation with communication devices, such as RFD900, Herelink, and H-16 Pro GCS and hardware protocols like I2C, and UART. The book also guides you in using the open-source flight software Ardupilot and PX4, along with firmware architecture and PID tuning for advanced control. Additionally, you’ll go learn about AeroGCS, Mission Planner, and UGCS ground control stations, tips for maiden flight and log analysis for optimizing performance while building a custom survey drone with a 60-min endurance, 10km range, live video feed, and photography options. By the end of this book, you’ll be equipped with all you need to build and fly your own drones and UAVs.What you will learn Explore the design principles for multicopter flight and its physics of motion Grasp terminologies associated with UAV flight systems Implement power trail, communication, and propulsion conceptsin drone design Use IMUs and sensors in flight controllers, and protocols like I2C, SPI, and MAvlink Familiarize yourself with open-source drone flight stacks and ground control station software Apply the control law used in multicopter and the basics of PIDs Delve into modes of flying with remote controllers and analysis of flight logs Who this book is for This book is for beginner-level drone engineers, robotics engineers, hardware and design engineers, and hobbyists who want to enter the drone industry and enhance their knowledge of the physics, mechanics, avionics, and programming of drones, multicopters, and UAVs. While not a prerequisite, a basic understanding of circuits, microcontrollers, and electronic instruments like multimeter, camera, and batteries, along with fundamental concepts in physics and mathematics, will be helpful.

Download or read book Design and Evaluation of an Autonomous Obstacle Avoiding Flight Control System Using Visual Sensors written by Bobby Grant Crawford and published by . This book was released on 2004 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonlinear Control of Fixed Wing UAVs with Time Varying and Unstructured Uncertainties written by Michail G. Michailidis and published by Springer Nature. This book was released on 2020-02-21 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces a comprehensive and mathematically rigorous controller design for families of nonlinear systems with time-varying parameters and unstructured uncertainties. Although the presented methodology is general, the specific family of systems considered is the latest, NextGen, unconventional fixed-wing unmanned aircraft with circulation control or morphing wings, or a combination of both. The approach considers various sources of model and parameter uncertainty, while the controller design depends not on a nominal plant model, but instead on a family of admissible plants. In contrast to existing controller designs that consider multiple models and multiple controllers, the proposed approach is based on the ‘one controller fits all models’ within the unstructured uncertainty interval. The book presents a modeling-based analysis and synthesis approach with additive uncertainty weighting functions for accurate realization of the candidate systems. This differs significantly from existing designs in that it is capable of handling time-varying characteristics. This research monograph is suitable for scientists, engineers, researchers and graduate students with a background in control system theory who are interested in complex engineering nonlinear systems.

Download or read book Control of Autonomous Aerial Vehicles written by Andrea L'Afflitto and published by Springer Nature. This book was released on 2023-11-20 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control of Autonomous Aerial Vehicles is an edited book that provides a single-volume snapshot on the state of the art in the field of control theory applied to the design of autonomous unmanned aerial vehicles (UAVs), aka “drones”, employed in a variety of applications. The homogeneous structure allows the reader to transition seamlessly through results in guidance, navigation, and control of UAVs, according to the canonical classification of the main components of a UAV’s autopilot. Each chapter has been written to assist graduate students and practitioners in the fields of aerospace engineering and control theory. The contributing authors duly present detailed literature reviews, conveying their arguments in a systematic way with the help of diagrams, plots, and algorithms. They showcase the applicability of their results by means of flight tests and numerical simulations, the results of which are discussed in detail. Control of Autonomous Aerial Vehicles will interest readers who are researchers, practitioners or graduate students in control theory, autonomous systems or robotics, or in aerospace, mechanical or electrical engineering.

Download or read book Aircraft Digital Control Design Methods written by Stanford University. Department of Aeronautics and Astronautics and published by . This book was released on 1976 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Digital Flight Control Research written by J. E. Potter and published by . This book was released on 1974 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of studies which were undertaken to contribute to the design of digital flight control systems, particularly for transport aircraft are presented. In addition to the overall design considerations for a digital flight control system, the following topics are discussed in detail: (1) aircraft attitude reference system design, (2) the digital computer configuration, (3) the design of a typical digital autopilot for transport aircraft, and (4) a hybrid flight simulator.

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.