Download or read book A Multiple Model Adaptive Tracking Algorithm for a High Energy Laser Weapon System written by David M. Tobin (2LT, USAF.) and published by . This book was released on 1986 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Multiple Model Adaptive Tracking Algorithm for a High Energy Laser Weapon System written by David M. Tobin and published by . This book was released on 1986 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis considers replacing a standard correlation tracker with a hybrid Kalman filter/enhanced correlation tracker in a high energy laser weapon system. Dynamic airborne targets are tracked by a Bayesian multiple model adaptive filtering (MMAF) algorithm, which processes the outputs of a matrix-type array of infrared sensing detectors. Emphasis is placed on extending the adaptive potential of the tracking algorithm. This is accomplished by processing measurements from various field of view (FOV) sizes and shapes, and by incorporating direction-dependent target dynamics in some of the elemental Kalman filters within the multiple model structure. A sensor to target range tuning algorithm is derived which can be used for on line adaptive filter tuning should the tracker be provided range information, (even at low sample rates and/or precision), possibly via laser ranging. Also, the problem of initial target acquisition is explored through an algorithm which acquires the target in the center of the FOV despite initial sensor pointing errors. Two different target dynamics models are considered for the elemental Kalman filters: a linear, Gauss-Markov acceleration model, and a nonlinear, constant turn-rate model.
Download or read book A Multiple Model Adaptive Tracking Algorithm Against Airborne Targets written by Thomas A. Leeney and published by . This book was released on 1987 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis extends the AFIT research directed towards replacing a standard correlation tracker with a Kalman filter bank/enhanced correlation tracker in a high energy laser weapon system. Airborne targets are tracked by a Bayesian multiple model adaptive filtering (MMAF) algorithm, which utilizes an array of infrared sensing detectors as the measurement information for two-dimensional position data. Two different target dynamics models are exercised: a linear, Gauss-Markov acceleration model, and a nonlinear, constant turn-rate model. Performance analyses are accomplished via Monte Carlo simulation techniques. Extending the adaptive potential of the tracking algorithm is of primary emphasis. The effects of bending and vibration of a large space structure on the FLIR's ability to resolve target position is analyzed. Also, a performance comparison/simulation time tradeoff is conducted with the tracking algorithm operating at both 30 Hz and 50 Hz. Sensitivity studies of adaptive responsiveness to varying target trajectories, various filter-assumed correlation times, range to pixel size relationships, and pixel size to filter driving white noise strength relationships are performed. The robustness of the multiple model algorithm is demonstrated by its ability to adapt to scenarios which it had not been previously tuned.
Download or read book Enhanced Tracking of Airborne Targets Using Multiple Model Filtering Techniques for Adaptive Field of View Expansion written by R. I. Suizu and published by . This book was released on 1983 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was part of an ongoing effort at the Air Force Institute of Technology to design a tracking algorithm for use with the Air Force Weapons Laboratory's high energy laser weapon system. The purpose of this thesis was to take previously developed tracker algorithms and incorporate a multiple model adaptive filter algorithm into the existing structure. This approach was intended to provide adaptive expansion of the effective tracker field of view, which in turn would increase the tracker's ability to maintain lock on highly dynamic, close range targets.
Download or read book Control and Dynamic Systems V31 Advances in Aerospace Systems Dynamics and Control Systems Part 1 of 3 written by C.T. Leonides and published by Elsevier. This book was released on 2012-12-02 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control and Dynamic Systems: Advances in Theory in Applications, Volume 31: Advances in Aerospace Systems Dynamics and Control Systems, Part 1 of 3 deals with significant advances in technologies which support the development of aerospace systems. It also presents several algorithms and computational techniques used in complex aerospace systems. The techniques discussed in this volume include: moving-bank multiple model adaptive estimation, algorithms for multitarget sensor tracking systems; algorithms in differential dynamic programming; optimal control of linear stochastic systems; and normalized predictive deconvulation. This book is an important reference for practitioners in the field who want a comprehensive source of techniques with significant applied implications.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thougtit that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 31 (thesis year 1986) a total of 11 ,480 theses titles trom 24 Canadian and 182 United States universities. We are sure that this broader base tor these titles reported will greatly enhance the value ot this important annual reterence work. While Volume 31 reports theses submitted in 1986, on occasion, certain univer sities do re port theses submitted in previousyears but not reported at the time.
Download or read book Control and Dynamic Systems written by Cornelius T. Leondes and published by . This book was released on 1989 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1988-07 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiple Model Adaptive Tracking of Airborne Targets written by John E. Norton and published by . This book was released on 1988 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past ten years considerable work has been accomplished at the Air Force Institute of Technology (AFIT) towards improving the ability of tracking airborne targets. Motivated by the performance advantages in using established models of tracking environment variables within a Kalman filter, an advanced tracking algorithm has been developed based on adaptive estimation filter structures. A multiple model bank of filters that have been designed for various target dynamics, which each accounting for atmospheric disturbance of the Forward Looking Infrared (FLIR) sensor data and mechanical vibrations of the sensor platform, outperforms a correlator tracker. The bank of filters provide the estimation capability to guide the pointing mechanisms of a shared aperture laser/sensor system. The data is provided to the tracking algorithm via an (8 x 8)-pixel tracking Field of View (FOV) from the FLIR image plane. Data at each sample period is compared by an enhanced correlator to a target template. These offsets are measurements to a bank of linear Kalman filters which provide estimates of the target's location in azimuth and elevation coordinates based on a Gauss-Markov acceleration model, and a reduced form of the atmospheric jitter model for the disturbance in the IR wavefront carrying future measurements. Theses. (RH).
Download or read book AGARD Lecture Series written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1989 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enhanced Tracking of Airborne Targets Using Forward Looking Infrared and Laser Return Measurements written by Patrick J. Grondin and published by . This book was released on 1993 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force Institute of Technology has been involved in developing Kalman filter based trackers of ballistic missiles for 15 years. The goal of this thesis is to develop a Multiple Model Adaptive Estimator (MMAE) that tracks the missile plume (using a forward looking infrared sensor) and the missile hardbody center-of-mass (additionally using low energy laser returns) for the purpose of directing a high power laser to incapacitate the missile. The missile plume 'pogos' about an offset equilibrium point (relative to the hardbody center-of-mass) with an amplitude and frequency of oscillation that are not precisely known a priori. The MMAE algorithm estimates these parameters to improve performance in tracking the hardbody center-of-mass. To accomplish this MMAE structure, single Kalman filters were developed and tested at the different parameter values. A Kalman filter residual analysis was used on these working single filters to define the MMAE structure that provided the most effective adaptation and most accurate target tracking. A three-filter MMAE structure gave the lowest hardbody center-of-mass tracking errors. The two-dimensional parameter space, pogo amplitude and frequency, was successfully partitioned according to the frequency of oscillation. When the plume pogo amplitude is large, the MMAE structure substantially reduces the tracking errors of the hardbody center-of-mass, compared to a tracker without adaptive pogo estimation. Kalman filter, Tracking, Infrared, Doppler, Laser.
Download or read book Proceedings of the 26th IEEE Conference on Decision and Control written by and published by . This book was released on 1987 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the IEEE 1989 National Aerospace and Electronics Conference NAECON 1989 written by and published by . This book was released on 1989 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Approaches to Manoeuvering Target Tracking written by Murat Efe and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric Propagation of High Energy Lasers Modeling Simulation Tracking and Control written by and published by . This book was released on 2008 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Under this MRI funded by HEL JTO and AFOSR, UCLA, in collaboration with Michigan Tech, Georgia Tech, MZA Associates Corporation, Tempest Technologies, Trex Enterprises Corporation, ATK Mission Research and the Air Force Institute of Technology (AFIT), has established a comprehensive research program in high-performance control of high energy lasers (HEL), modeling and simulation of HEL, wavefront sensing, and target tracking. Under this program, researchers have developed adaptive filtering and control methods for wavefront prediction and correction and precise pointing of laser beams to compensate for the effects of atmospheric turbulence, platform vibration, target motion and sensor noise, all of which degrade the performance of laser weapons and communication systems. The research team for this multidisciplinary research initiative has made a comprehensive, integrated attack on the broad range of modeling and simulation, beam control, and target tracking problems that must be solved to achieve the potential of high energy laser systems. This report discusses the main results of the research.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
