218
218

Jun 21, 2010
06/10

by
Brockman, P.; Brooks, D. R.; Hess, R. V.; Hoell, J. M., Jr

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Diagnostics and interpretation of acceleration mechanism in magnetoplasmadynamic arc

Topics: OPTIMIZATION, SCALARS, TOPOLOGY, VECTOR ANALYSIS, CONSTRAINTS, LINEAR TRANSFORMATIONS, WEIGHTING...

41
41

Jul 28, 2020
07/20

by
Richard Courant and David Hilbert

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The first edition of the German version of volume 1 of Methoden Der Mathematischen ( Methods of Mathematical Physics ) by Richard Courant and David Hilbert, published in 1924.

Topics: Mathematics, Linear Transformations, Bessel, Fourier, Legendre, Calculus of Variations, Eigenvalue...

251
251

Jul 9, 2010
07/10

by
SEKTOROV, V. R

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THE UTILIZATION OF WIND ENERGY FOR GENERATING ELECTRIC POWER IS DISCUSSED. EXISTING POWER GENERATORS UTILIZING WIND ENERGY ARE DESCRIBED AND THEIR USE IN AGRICULTURE IS INDICATED.

Topics: EIGENVECTORS, HILBERT SPACE, MODULAR RATIOS, DIRICHLET PROBLEM, LINEAR TRANSFORMATIONS, MELLIN...

An algorithm is developed to find a quick way to determine the origin O in the complex plane C within the image of Q (a subset of the parameter space R(sup n)) under the multilinear function p(j omega, q) = f(q) + g(q)j for a fixed omega.

Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, ITERATIVE SOLUTION, LINEAR TRANSFORMATIONS,...

223
223

Jul 11, 2010
07/10

by
Brundidge, K. C

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The structure of wakes and how this structure is related to the size and shape of buildings and other obstacles, and to ambient winds, was investigated. Mean values of natural atmospheric flow were obtained and used in conjunction with theoretical relationships developed by dimensional analysis to establish a model of the flow in the wake. Results indicate that conventional and V/STOL aircraft passing through the wake during takeoff and landing would experience not only a change in turbulence...

Topics: LINEAR TRANSFORMATIONS, OPTICAL DATA PROCESSING, ALGORITHMS, NORMAL DENSITY FUNCTIONS, RANDOM...

215
215

Jun 9, 2011
06/11

by
Ambur, Damodar R.; McGowan, David M.; Davila, Carlos G

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A progressive failure analysis method based on shell elements is developed for the computation of damage initiation and growth in stiffened thick-skin stitched graphite-epoxy panels loaded in axial compression. The analysis method involves a step-by-step simulation of material degradation based on ply-level failure mechanisms. High computational efficiency is derived from the use of superposed layers of shell elements to model each ply orientation in the laminate. Multiple integration points...

Topics: PARAMETERIZATION, MATHEMATICAL MODELS, SET THEORY, UNCERTAIN SYSTEMS, FEASIBILITY ANALYSIS,...

228
228

Jun 20, 2010
06/10

by
Khvedelidze, B. V

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Singular integral equations, and continuous functions for linear discontinuous boundary problems

Topics: BOUNDARY VALUE PROBLEMS, FUNCTIONAL ANALYSIS, MATHEMATICAL MODELS, SINGULAR INTEGRAL EQUATIONS,...

251
251

May 21, 2011
05/11

by
Wheeler, James R

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A 3.5 inch rabbit-ear-terminal nickel-hydrogen cell was designed and tested to deliver high capacity at steady discharge rates up to and including a C rate. Its specific energy yield of 60.6 wh/kg is believed to be the highest yet achieved in a slurry-process nickel-hydrogen cell, and its 10 C capacity of 113.9 AH the highest capacity yet of any type in a 3.5 inch diameter size. The cell also demonstrated a pulse capability of 180 amps for 20 seconds. Specific cell parameters and performance...

Topics: CHIPS (ELECTRONICS), CODERS, ERROR DETECTION CODES, RADIATION EFFECTS, VERY LARGE SCALE...

2,040
2.0K

Jan 24, 2020
01/20

by
N. V. Efimov, E. R. Rozendorn

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This book was conceived as a text combining the course of linear algebra and analytic geometry. It originated as a course of lectures delivered by N. V. Efimov at Moscow State University (mechanics and mathematics department) in 1964-1966. However, the material of these lectures has been completely reworked and substantially expanded. We have tried to bear in mind the requirements of other mathematical disciplines and also of mechanics and physics. We hope that all parts of the text will be...

Topics: mir books, mathematics, algebra, geometry, multi-dimensional, linear spaces, linear...

190
190

Jun 9, 2011
06/11

by
Cabell, Randolph H.; Gibbs, Gary P.; Sprofera, Joseph D.; Clark, Robert L

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Turbulent boundary layer (TBL) noise is considered a primary factor in the interior noise experienced by passengers aboard commercial airliners. There have been numerous investigations of interior noise control devoted to aircraft panels; however, practical realization is a challenge since the physical boundary conditions are uncertain at best. In most prior studies, pinned or clamped boundary conditions have been assumed; however, realistic panels likely display a range of varying boundary...

Topics: CORRELATION COEFFICIENTS, LINEAR TRANSFORMATIONS, TENSOR ANALYSIS, ORTHOGONALITY, COST ESTIMATES,...

488
488

Sep 1, 2020
09/20

by
A. V. Pogorelov

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Analytical geometry has no strictly defined contents. It is the method but not the subject under investigation, that constitutes the leading feature of this branch of geometry. The essence of this method consists in that geometric objects are associated in some standard way with equations (or systems of equations) so that geometric relations of figures are expressed through properties of their equations. For instance, in case of Cartesian coordinates any straight line in ...

Topics: mirtitles, mathematics, mir publishers, high school, geometry, analytical, quadratics, conic...

302
302

May 23, 2011
05/11

by
Lake, Mark S.; Warren, Peter A.; Peterson, Lee D

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NASA Langley Research center is developing key structures and mechanisms technologies for micron-accuracy, in-space deployment of future space instruments. Achieving micron-accuracy deployment requires significant advancements in deployment mechanism design such as the revolute joint presented herein. The joint presented herein exhibits a load-cycling response that is essentially linear with less than two percent hysteresis, and the joint rotates with less than one in.-oz. of resistance. A...

Topics: AUDITORY PERCEPTION, AUDIOMETRY, LINEAR TRANSFORMATIONS, SOUND FIELDS, SOUND WAVES, ACOUSTICS,...

Autocorrelated normal random variates were generated via computer and the effects of various levels of correlation on goodness of fit problems were studied. The results are useful in determining the distribution or estimating the parameters of populations that correlate observations such as wind speeds and temperature. The model used to generate the autocorrelated data is an autoregressive process of order 1. The Kolmogorov-Smirnov and chi-square statistics are used in the analysis. It was...

Topics: NASA Technical Reports Server (NTRS), AUTOCORRELATION, COMPUTER PROGRAMS, STATISTICAL ANALYSIS,...

576
576

Jun 3, 2011
06/11

by
Teverovsky, Alexander; Sahu, Kusu

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Potential users of plastic encapsulated microcircuits (PEMs) need to be reminded that unlike the military system of producing robust high-reliability microcircuits that are designed to perform acceptably in a variety of harsh environments, PEMs are primarily designed for use in benign environments where equipment is easily accessed for repair or replacement. The methods of analysis applied to military products to demonstrate high reliability cannot always be applied to PEMs. This makes it...

Topics: FRICTION MEASUREMENT, USER MANUALS (COMPUTER PROGRAMS), PERSONAL COMPUTERS, MATHEMATICAL MODELS,...

Linear vector space theory is used to develop a general representation of a set of data vectors or random vectors by linear combinations of orthonormal vectors such that the mean squared error of the representation is minimized. The orthonormal vectors are shown to be the eigenvectors of an operator. The general representation is applied to several specific problems involving the use of the Karhunen-Loeve expansion, principal component analysis, and empirical orthogonal functions; and the...

Topics: NASA Technical Reports Server (NTRS), LINEAR TRANSFORMATIONS, SET THEORY, VECTOR SPACES,...

A characterization of the Laplace transform is developed which extends the transform to the Schwartz distributions. The class of distributions includes the impulse functions and other singular functions which occur as solutions to ordinary and partial differential equations. The standard theorems on analyticity, uniqueness, and invertibility of the transform are proved by using the characterization as the definition of the Laplace transform. The definition uses sequences of linear...

Topics: NASA Technical Reports Server (NTRS), DISTRIBUTION FUNCTIONS, LAPLACE TRANSFORMATION, SCHWARTZ...

Techniques for solving the feature selection problem are presented. Topics discussed include the reduction of the number of variables in "best b", and the iterative selection of H sub i.

Topics: NASA Technical Reports Server (NTRS), MATRICES (MATHEMATICS), PROBLEM SOLVING, ITERATIVE SOLUTION,...

Theoretical backgrounds and digital techniques for a class of image processing problems are presented. Image formation in the context of linear system theory, image evaluation, noise characteristics, mathematical operations on image and their implementation are discussed. Various techniques for image restoration and image enhancement are presented. Methods for object extraction and the problem of pictorial pattern recognition and classification are discussed.

Topics: NASA Technical Reports Server (NTRS), COMPUTER TECHNIQUES, IMAGE ENHANCEMENT, IMAGING TECHNIQUES,...

In the linearization of systems of non-linear differential equations, those systems which can be exactly transformed into the second order linear differential equation Y"-AY'-BY=0 where Y, Y', and Y" are n x 1 vectors and A and B are constant n x n matrices of real numbers were considered. The 2n x 2n matrix was used to transform the above matrix equation into the first order matrix equation X' = MX. Specially the matrix M and the conditions which will diagonalize or triangularize M...

Topics: NASA Technical Reports Server (NTRS), DIFFERENTIAL EQUATIONS, LINEARIZATION, MATRICES...

230
230

May 21, 2011
05/11

by
NON

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A method and apparatus for characterizing the time and frequency response of an ultrasonically reflective contrast agent is disclosed. An ultrasonically reflective contrast agent is injected, under constant pressure, into a fluid flowing through a pump flow circuit. The fluid and the ultrasonically reflective contrast agent are uniformly mixed in a mixing chamber, and the uniform mixture is passed through a contrast agent chamber. The contrast agent chamber is acoustically and axially...

Topics: ARRAYS, FORTRAN, OPTIMIZATION, PARALLEL COMPUTERS, COMPUTER PROGRAMS, DISTRIBUTED PROCESSING,...

Several of the techniques used in pattern recognition are reformulated as the problem of determining fixed points of a function. If x sub 0 is a fixed point of f and if f is contractive at x sub 0, then, for any y belonging to a sufficiently small neighborhood of x sub 0 the orbit of y will converge to x sub 0. Several general results regarding contractive mappings are developed with emphasis on functions.

Topics: NASA Technical Reports Server (NTRS), MAPPING, PATTERN RECOGNITION, BANACH SPACE, FUNCTIONS...

It is shown that all combinations of symmetrical input distributions with difference distortion measures give a bit assignment rule identical to the well-known rule for a Gaussian input distribution with mean-square error. Published work is examined to show that the bit assignment rule is useful for transforms of full pictures, but subjective bit assignments for transform picture coding using small block sizes are significantly different from the theoretical bit assignment rule. An intuitive...

Topics: NASA Technical Reports Server (NTRS), LINEAR TRANSFORMATIONS, OPTICAL DATA PROCESSING, ALGORITHMS,...

Folkscanomy Mathematics: Books of a Mathematic Nature

2,351
2.4K

Apr 22, 2018
04/18

by
Howard Anton obtained his B.A. from Lehigh University, his M.A. from the University of Illinois, and his Ph.D. from the Polytechnic University of Brooklyn, all in mathematics.

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This edition of Elementary Linear Algebra gives an introductory treatment of linear algebra that is suitable for a first undergraduate course. Its aim is to present the fundamentals of linear algebra in the clearest possible way—sound pedagogy is the main consideration. Although calculus is not a prerequisite, there is some optional material that is clearly marked for students with a calculus background. If desired, that material can be omitted without loss of continuity. Technology is not...

Topics: Systems of Linear Equations and Matrices, Determinants, Euclidean Vector Spaces, General Vector...

The geometric viewpoint identifies the choice of a correlation matrix for the simulation of cost risk with the pairwise choice of data vectors corresponding to the parameters used to obtain cost risk. The correlation coefficient is the cosine of the angle between the data vectors after translation to an origin at the mean and normalization for magnitude. Thus correlation is equivalent to expressing the data in terms of a non orthogonal basis. To understand the many resulting phenomena requires...

Topics: NASA Technical Reports Server (NTRS), CORRELATION COEFFICIENTS, COST ESTIMATES, SIMULATION,...

Given measurement data, a nominal model and a linear fractional transformation uncertainty structure with an allowance on unknown but bounded exogenous disturbances, easily computable tests for the existence of a model validating uncertainty set are given. Under mild conditions, these tests are necessary and sufficient for the case of complex, nonrepeated, block-diagonal structure. For the more general case which includes repeated and/or real scalar uncertainties, the tests are only necessary...

Topics: NASA Technical Reports Server (NTRS), PARAMETERIZATION, MATHEMATICAL MODELS, SET THEORY, UNCERTAIN...

The states of the three-dimensional quantum harmonic oscillator classify optical aberrations of axis-symmetric systems due to the isomorphism between the two mathematical structures. Cartesian quanta and angular momentum classifications have their corresponding aberration classifications. The operation of concatenation of optical elements introduces a new operation between harmonic oscillator states.

Topics: NASA Technical Reports Server (NTRS), ABERRATION, GEOMETRICAL OPTICS, HARMONIC OSCILLATORS,...

The formulation of appropriate state-space models for Kalman filtering applications is studied. The so-called model is completely specified by four matrix parameters and the initial conditions of the recursive equations. Once these are determined, the die is cast, and the way in which the measurements are weighted is determined foreverafter. Thus, finding a model that fits the physical situation at hand is all important. Also, it is often the most difficult aspect of designing a Kalman filter....

Topics: NASA Technical Reports Server (NTRS), KALMAN FILTERS, MATHEMATICAL MODELS, MATRICES (MATHEMATICS),...

In many pattern recognition problems, data vectors are classified although one or more of the data vector elements are missing. This problem occurs in remote sensing when the ground is obscured by clouds. Optimal linear discrimination procedures for classifying imcomplete data vectors are discussed.

Topics: NASA Technical Reports Server (NTRS), LINEAR TRANSFORMATIONS, PATTERN RECOGNITION, VECTORS...

Classifying large quantities of multidimensional remotely sensed agricultural data requires efficient and effective classification techniques and the construction of certain transformations of a dimension reducing, information preserving nature. The construction of transformations that minimally degrade information (i.e., class separability) is described. Linear dimension reducing transformations for multivariate normal populations are presented. Information content is measured by divergence.

Topics: NASA Technical Reports Server (NTRS), COMBINATORIAL ANALYSIS, CROP IDENTIFICATION, DATA REDUCTION,...

In the study of the dynamics and kinematics of the human body a wide variety of technologies has been developed. Photogrammetric techniques are well documented and are known to provide reliable positional data from recorded images. Often these techniques are used in conjunction with cinematography and videography for analysis of planar motion, and to a lesser degree three-dimensional motion. Cinematography has been the most widely used medium for movement analysis. Excessive operating costs and...

Topics: NASA Technical Reports Server (NTRS), CINEMATOGRAPHY, COMPUTER PROGRAMS, HUMAN BODY, HUMAN...

This paper reports a Class S CCSDS recommendation Reed Solomon encoder circuit baselined for several NASA programs. The chip is fabricated using United Technologies Microelectronics Center's UTE-R radiation-hardened gate array family, contains 64,000 p-n transistor pairs, and operates at a sustained output data rate of 200 MBits/s. The chip features a pin selectable message interleave depth of from 1 to 8 and supports output block lengths of 33 to 255 bytes. The UTE-R process is reported to...

Topics: NASA Technical Reports Server (NTRS), CHIPS (ELECTRONICS), CODERS, ERROR DETECTION CODES, RADIATION...

A procedure for calculating a kxn rank k matrix B for data compression using the Bhattacharyya bound on the probability of error and an iterative construction using Householder transformation was developed. Two sets of remotely sensed agricultural data are used to demonstrate the application of the procedure. The results of the applications gave some indication of the extent to which the Bhattacharyya bound on the probability of error is affected by such transformations for multivariate normal...

Topics: NASA Technical Reports Server (NTRS), AGRICULTURE, BAYES THEOREM, DATA COMPRESSION, PROBABILITY...

Quantitative measures of the uncertainty of Earth System estimates can be as important as the estimates themselves. Second moments of estimation errors are described by the covariance matrix, whose direct calculation is impractical when the number of degrees of freedom of the system state is large. Ensemble and reduced-state approaches to prediction and data assimilation replace full estimation error covariance matrices by low-rank approximations. The appropriateness of such approximations...

Topics: NASA Technical Reports Server (NTRS), WEATHER FORECASTING, CLIMATOLOGY, DATA ACQUISITION, DATA...

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193

May 23, 2011
05/11

by
Bula, R. J.; Duffie, N. A

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A more complete understanding of the dynamics of capillary flow through an unsaturated porous medium would be useful for a number of space and terrestrial applications. Knowledge of capillary migration of liquids in granular beds in microgravity would significantly enhance the development and understanding of how a matrix based nutrient delivery system for the growth of plants would function in a microgravity environment. Thus, such information is of interest from the theoretical as well as...

Topics: ATMOSPHERIC MODELS, ASTROPHYSICS, WATER VAPOR, METALLICITY, SPACE PLASMAS, PHOTOSPHERE, M STARS,...

A personal computer application (CXWIN4G) has been written which greatly simplifies the task of extracting skin friction measurements from interferograms of oil flows on the surface of wind tunnel models. Images are first calibrated, using a novel approach to one-camera photogrammetry, to obtain accurate spatial information on surfaces with curvature. As part of the image calibration process, an auxiliary file containing the wind tunnel model geometry is used in conjunction with a...

Topics: NASA Technical Reports Server (NTRS), FRICTION MEASUREMENT, PERSONAL COMPUTERS, MATHEMATICAL...

All auditory sensory information is packaged in a pair of acoustical pressure waveforms, one at each ear. While there is obvious structure in these waveforms, that structure (temporal and spectral patterns) bears no simple relationship to the structure of the environmental objects that produced them. The properties of auditory objects and their layout in space must be derived completely from higher level processing of the peripheral input. This chapter begins with a discussion of the...

Topics: NASA Technical Reports Server (NTRS), AUDITORY PERCEPTION, SOUND FIELDS, SOUND WAVES, ACOUSTICS,...

An approach to exploiting curve-to-curve dependencies in order to achieve high data compression is presented. One of the approaches to date of along curve compression through use of cubic spline approximation is taken and extended by investigating the additional compressibility achievable through curve-to-curve structure exploitation. One of the models under investigation is reported on.

Topics: NASA Technical Reports Server (NTRS), CURVE FITTING, DATA COMPRESSION, MAPPING, METEOROLOGICAL...

Blocked algorithms have much better properties of data locality and therefore can be much more efficient than ordinary algorithms when a memory hierarchy is involved. On the other hand, they are very difficult to write and to tune for particular machines. The reorganization is considered of nested loops through the use of known program transformations in order to create blocked algorithms automatically. The program transformations used are strip mining, loop interchange, and a variant of loop...

Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, BLOCKING, LINEAR TRANSFORMATIONS, MATRICES...

General classes of nonlinear and linear transformations were investigated for the reduction of the dimensionality of the classification (feature) space so that, for a prescribed dimension m of this space, the increase of the misclassification risk is minimized.

Topics: NASA Technical Reports Server (NTRS), BAYES THEOREM, DATA PROCESSING, LINEAR TRANSFORMATIONS,...

Calculations are given for constructing the three dimensional distribution of optically thin EUV emission sources associated with solar active regions, from two dimensional observations (projections) recorded by the spectroheliograph on the OSO 7 satellite. The relation of the method to other image reconstruction methods is briefly discussed as well as the special requirements imposed in the solar case such as a knowledge of the true solar rotation function. A useful correlation criterion for...

Topics: NASA Technical Reports Server (NTRS), LATTICES (MATHEMATICS), LINEAR TRANSFORMATIONS, SOLAR CORONA,...

Three-dimensional pictorial displays incorporating depth cues by means of stereopsis offer a potential means of presenting information in a natural way to enhance situational awareness and improve operator performance. Conventional computational techniques rely on asymptotic projection transformations and symmetric clipping to produce the stereo display. Implementation of two new computational techniques, as asymmetric clipping algorithm and piecewise linear projection transformation, provides...

Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, COMPUTER GRAPHICS, DISPLAY DEVICES, FIELD OF...

Mushy layers are ubiquitous during the solidification of alloys. They are regions of mixed phase wherein solid crystals are bathed in the melt from which they grew. The matrix of crystals forms a porous medium through which the melt can flow, driven either by external forces or by its own buoyancy in a gravitational field. Buoyancy-driven convection of the melt depends both on temperature gradients, which are necessary for solidification, and on compositional gradients, which are generated as...

Topics: NASA Technical Reports Server (NTRS), BRANCHING (MATHEMATICS), BUOYANCY, CONVECTION, CRYSTAL...

The possibility of using the phase space formalism to establish a correspondence between the dynamical behavior of squeezed states and optical or charged beams, propagating through linear systems, has received a great deal of attention during the last years. In this connection, it has been indicated how optical experiments may be conceived to measure the Wigner rotation angle. In this paper we address the topic within the context of the paraxial propagation of optical or charged beams and...

Topics: NASA Technical Reports Server (NTRS), ANGULAR MOMENTUM, CANONICAL FORMS, ELECTRON BEAMS, LIGHT...

Some theoretical questions involved in the mathematical modeling of the kinetics of complex chemical process are discussed. The analysis is carried out for the homogeneous oxidation of ethylbenzene in the liquid phase. Particular attention is given to the determination of the general characteristics of chemical systems from an analysis of mathematical models developed on the basis of linear algebra.

Topics: NASA Technical Reports Server (NTRS), CHEMICAL REACTION CONTROL, HYDROCARBON COMBUSTION,...

Implementing a data-parallel language such as Fortran 90 on a distributed-memory parallel computer requires distributing aggregate data objects (such as arrays) among the memory modules attached to the processors. The mapping of objects to the machine determines the amount of residual communication needed to bring operands of parallel operations into alignment with each other. We present a program representation called the alignment distribution graph that makes these communication requirements...

Topics: NASA Technical Reports Server (NTRS), ARRAYS, COMPUTER PROGRAMS, DISTRIBUTED PROCESSING,...

In image-based measurements, quantitative image data must be mapped to three-dimensional object space. Analytical photogrammetric methods, which may be used to accomplish this task, are discussed from the viewpoint of experimental fluid dynamicists. The Direct Linear Transformation (DLT) for camera calibration, used in pressure sensitive paint, is summarized. An optimization method for camera calibration is developed that can be used to determine the camera calibration parameters, including...

Topics: NASA Technical Reports Server (NTRS), PHOTOGRAMMETRY, WIND TUNNEL TESTS, CALIBRATING, CAMERAS,...

Robust control system analysis and design is based on an uncertainty description, called a linear fractional transformation (LFT), which separates the uncertain (or varying) part of the system from the nominal system. These models are also useful in the design of gain-scheduled control systems based on Linear Parameter Varying (LPV) methods. Low-order LFT models are difficult to form for problems involving nonlinear parameter variations. This paper presents a numerical computational method for...

Topics: NASA Technical Reports Server (NTRS), DIRECT NUMERICAL SIMULATION, COMPUTERIZED SIMULATION,...

To characterize and quantify the performance of the Landsat thematic mapper (TM), techniques for dimensionality reduction by linear transformation have been studied and evaluated and the accuracy of the correction of geometric errors in TM images analyzed. Theoretical evaluations and comparisons for existing methods for the design of linear transformation for dimensionality reduction are presented. These methods include the discrete Karhunen Loeve (KL) expansion, Multiple Discriminant Analysis...

Topics: NASA Technical Reports Server (NTRS), GEOMETRIC RECTIFICATION (IMAGERY), IMAGE ENHANCEMENT, LANDSAT...

An image-based phase retrieval technique has been developed that can be used on board a space based iterative transformation system. Image-based wavefront sensing is computationally demanding due to the floating-point nature of the process. The discrete Fourier transform (DFT) calculation is presented in "diagonal" form. By diagonal we mean that a transformation of basis is introduced by an application of the similarity transform of linear algebra. The current method exploits the...

Topics: NASA Technical Reports Server (NTRS), DISCRETE FUNCTIONS, FOURIER TRANSFORMATION, VECTOR SPACES,...

Formal robustness analysis of aircraft control upset prevention and recovery systems could play an important role in their validation and ultimate certification. Such systems developed for failure detection, identification, and reconfiguration, as well as upset recovery, need to be evaluated over broad regions of the flight envelope or under extreme flight conditions, and should include various sources of uncertainty. To apply formal robustness analysis, formulation of linear fractional...

Topics: NASA Technical Reports Server (NTRS), FAULT TOLERANCE, FEEDBACK CONTROL, TRANSPORT AIRCRAFT,...