12 research outputs found
Sliding Mode Control
The main objective of this monograph is to present a broad range of well worked out, recent application studies as well as theoretical contributions in the field of sliding mode control system analysis and design. The contributions presented here include new theoretical developments as well as successful applications of variable structure controllers primarily in the field of power electronics, electric drives and motion steering systems. They enrich the current state of the art, and motivate and encourage new ideas and solutions in the sliding mode control area
INTELLIGENT FAULT TOLERANT CONTROL SCHEMES FOR AUTONOMOUS UNDERWATER VEHICLES
The area of autonomous underwater vehicles (AUVs) is an increasingly important area of
research, with AUVs being capable of handling a far wider range of missions than either
an inhabited underwater vehicle or a remotely operated vehicle (ROV). One of the major
drawbacks of such vehicles is the inability of their control systems to handle faults
occurring within the vehicle during a mission. This study aims to develop enhancements
to an existing control system in order to increase its fault tolerance to both sensor and
actuator faults.
Faults occurring within the sensors for both the yaw and roll channels of the AUV are
considered. Novel fuzzy inference systems (FISs) are developed and tuned using both the
adaptive neuro-fuzzy inference system (ANFIS) and simulated annealing tuning methods.
These FISs allow the AUV to continue operating after a fault has occurred within the
sensors.
Faults occurring within the actuators which control the canards of the AUV and hence the
yaw channel are also examined. Actuator recovery FISs capable of handling faults
occurring within the actuators are developed using both the simulated annealing and tabu
search methods of tuning FISs. The fault tolerance of the AUV is then further enhanced
by the development of an error estimation FIS that is used to replace an error sensor.
It concludes that the novel FISs designed and developed within the thesis provide an
improved performance to both sensor and actuator faults in comparison to benchmark
control systems. Therefore having these FISs embedded within the overall control
scheme ensure the AUV is fault tolerant to a range of selected failures
New Approaches in Automation and Robotics
The book New Approaches in Automation and Robotics offers in 22 chapters a collection of recent developments in automation, robotics as well as control theory. It is dedicated to researchers in science and industry, students, and practicing engineers, who wish to update and enhance their knowledge on modern methods and innovative applications. The authors and editor of this book wish to motivate people, especially under-graduate students, to get involved with the interesting field of robotics and mechatronics. We hope that the ideas and concepts presented in this book are useful for your own work and could contribute to problem solving in similar applications as well. It is clear, however, that the wide area of automation and robotics can only be highlighted at several spots but not completely covered by a single book
NASA SBIR abstracts of 1991 phase 1 projects
The objectives of 301 projects placed under contract by the Small Business Innovation Research (SBIR) program of the National Aeronautics and Space Administration (NASA) are described. These projects were selected competitively from among proposals submitted to NASA in response to the 1991 SBIR Program Solicitation. The basic document consists of edited, non-proprietary abstracts of the winning proposals submitted by small businesses. The abstracts are presented under the 15 technical topics within which Phase 1 proposals were solicited. Each project was assigned a sequential identifying number from 001 to 301, in order of its appearance in the body of the report. Appendixes to provide additional information about the SBIR program and permit cross-reference of the 1991 Phase 1 projects by company name, location by state, principal investigator, NASA Field Center responsible for management of each project, and NASA contract number are included
Compilation of thesis abstracts, September 2009
NPS Class of September 2009This quarter’s Compilation of Abstracts summarizes cutting-edge, security-related research conducted by NPS students and presented as theses, dissertations, and capstone reports. Each expands knowledge in its field.http://archive.org/details/compilationofsis109452751
Aerial Vehicles
This book contains 35 chapters written by experts in developing techniques for making aerial vehicles more intelligent, more reliable, more flexible in use, and safer in operation.It will also serve as an inspiration for further improvement of the design and application of aeral vehicles. The advanced techniques and research described here may also be applicable to other high-tech areas such as robotics, avionics, vetronics, and space
NASA Tech Briefs, April 1993
Topics include: Optoelectronics; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Computer Programs; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences; Life Sciences
Aeronautical enginnering: A cumulative index to a continuing bibliography (supplement 312)
This is a cumulative index to the abstracts contained in NASA SP-7037 (301) through NASA SP-7073 (311) of Aeronautical Engineering: A Continuing Bibliography. NASA SP-7037 and its supplements have been compiled by the Center for AeroSpace Information of the National Aeronautics and Space Administration (NASA). This cumulative index includes subject, personal author, corporate source, foreign technology, contract number, report number, and accession number indexes