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Decision and Control including the 17th Symposium on Adaptive Processes, 1978 IEEE Conference on

Date 10-12 Jan. 1979

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Displaying Results 1 - 25 of 279
  • [Front cover and table of contents]

    Publication Year: 1978 , Page(s): c1
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    Freely Available from IEEE
  • Foreword

    Publication Year: 1978 , Page(s): iii
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    Freely Available from IEEE
  • Robustness with observers

    Publication Year: 1978 , Page(s): 1 - 6
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (412 KB)  

    This paper describes an adjustment procedure for observer-based linear control systems which asymptotically achieves the same loop transfer functions (and hence the same relative stability, robustness, and disturbance rejection properties) as full-state feedback control implementations. View full abstract»

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  • The robust nonlinear servomechanism problem

    Publication Year: 1978 , Page(s): 7 - 11
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (380 KB)  

    We study the asymptotic tracking and disturbance rejection property of a general nonlinear multi-input multi-output distributed servomechanism which consists of input as well as output channel nonlinearity. We also explore the robustness of this property of such nonlinear servomechanism. Our result shows that the design principle of the robust linear servomechanism (i.e. replicating the dynamics o... View full abstract»

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  • Robustness of multiloop linear feedback systems

    Publication Year: 1978 , Page(s): 12 - 18
    Cited by:  Papers (18)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (467 KB)  

    This paper presents a new approach to the frequency-domain analysis of multiloop linear feed-back systems. The properties of the return difference equation are examined using the concepts of singular values, singular vectors and the spectral norm of a matrix. A number of new tools for multiloop systems are developed which are analogous to those for scalar Nyquist and Bode analysis. These provide a... View full abstract»

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  • Towards fault-tolerant optimal control

    Publication Year: 1978 , Page(s): 19 - 20
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (209 KB)  

    Questions regarding the design of fault-tolerant controllers that may endow systems with dynamic reliability are addressed here. Results for jump linear quadratic Gaussian (JLQG) control problems are extended to include random jump costs, trajectory discontinuities, and a simple case of non-Markovian mode transitions. View full abstract»

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  • On the characterization of a minimal order robust servocompensator

    Publication Year: 1978 , Page(s): 21 - 24
    Request Permissions | Click to expandAbstract | PDF file iconPDF (277 KB)  

    In recent papers, [1] - [4], Davison et al. have given the characterization of a minimal-order robust feedback controller containing an error-driven compensator which achieves asymptotic tracking and disturbance rejection using state space methods. More recently, Desoer and Wang, [7] - [8], rederived the minimal order of a similar controller, [5], using frequency domain methods. It is the purpose ... View full abstract»

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  • New structures for parameter-insensitive controllers

    Publication Year: 1978 , Page(s): 25 - 30
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    Several methods have been proposed for designing feedback control laws which are minimally sensitive to variations in system parameters. The restricted structure of these control laws often limits the extent of their parameter insensitivity. In this paper, we show how the state feedback controller form may be extended to allow maximum variations in system parameters without loss of stability or si... View full abstract»

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  • A comparison of several techniques for designing controllers of uncertain dynamic systems

    Publication Year: 1978 , Page(s): 31 - 38
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (587 KB)  

    In recent years, a number of techniques have been developed for the design of linear, constant gain feedback controllers for systems with imprecisely Known parameters. In this paper, several of these techniques are compared in the context of the design of a lateral autopilot for a rudderless remotely piloted vehicle with uncertain aerodynamic coefficients. Properties of the design techniques on wh... View full abstract»

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  • A subroutine package for discrete estimation problems

    Publication Year: 1978 , Page(s): 39 - 44
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (395 KB)  

    In this paper we describe a well documented, compactly coded, storage efficient, thoroughly tested, and easy to use set of FORTRAN IV subroutines for use in Kalman filter or least-squares applications. The package contains both the UDUT covariance factorization and the square root information filter algorithms developed at the Jet Propulsion Laboratory. Numerical reliability of the algorithms is a... View full abstract»

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  • Fast modal analysis of large, sparse but unstructured symmetric matrices

    Publication Year: 1978 , Page(s): 45 - 53
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (627 KB)  

    Many engineering and scientific applications require the computation of eigenvalues of large, sparse but unstructured symmetric matrices. Existing algorithms can be used to compute a few extreme eigenvalues (and corresponding eigenvectors). Using ideas from optimization theory and abandoning classical requirements of global orthogonality, we construct a Lanczos algorithm for computing not just the... View full abstract»

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  • On the efficient and reliable numerical solution of large linear systems of O.D.E.'s

    Publication Year: 1978 , Page(s): 54 - 59
    Request Permissions | Click to expandAbstract | PDF file iconPDF (386 KB)  

    Using a Combination of numerical techniques from linear algebra and from ordinary differential equations, a package of efficient procedures are described for the efficient numerical solution of large linear systems of O.D.E.'s. The techniques avoid the explicit approximation of the matrix exponential and exploit any structure that is inherent in the system. Numerical results are presented which il... View full abstract»

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  • A schur method for solving algebraic Riccati equations

    Publication Year: 1978 , Page(s): 60 - 65
    Cited by:  Papers (10)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (546 KB)  

    In this paper a new algorithm for solving algebraic Riccati equations (both continuous-time and discrete-time versions) is presented. The method studied is a variant of the classical eigenvector approach and uses instead an appropriate set of Schur vectors thereby gaining substantial numerical advantages. Complete proofs of the Schur approach are given as well as considerable discussion of numeric... View full abstract»

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  • Singular value analysis of linear systems

    Publication Year: 1978 , Page(s): 66 - 73
    Cited by:  Papers (12)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (654 KB)  

    This paper is a condensed version of a recent two part report on applied analysis of linear multivariable systems [1], [2]. The basic thrust of the work is this: Singular value analysis, of proven power in applied analysis of systems of linear equations, can be applied in a very direct way to systems of linear differential equations as well. The essential fact revealed and exploited is that norm c... View full abstract»

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  • A generalized horner algorithm for computing integrals involving the matrix exponential

    Publication Year: 1978 , Page(s): 74 - 79
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    First Page of the Article
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  • Enhanced fire control system filtering via refined air-to- air missile acceleration modeling

    Publication Year: 1978 , Page(s): 80 - 87
    Request Permissions | Click to expandAbstract | PDF file iconPDF (666 KB)  

    An extended Kalman filter is developed to aid the tracking of an air-to-air missile from a maneuvering target aircraft. The filter exploits knowledge of the dominant aerodynamically induced lift and drag forces of a non-thrusting missile employing proportional navigation guidance, and it also accounts for the dynamic lag and bandwidth effects of the missile seeker, guidance, and control systems. I... View full abstract»

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  • Predictive guidance for interceptors with time delays

    Publication Year: 1978 , Page(s): 88 - 94
    Request Permissions | Click to expandAbstract | PDF file iconPDF (404 KB)  

    Predictive guidance equations for systems with time delays are developed using optimal control theory to obtain interceptor steering gains. Previously, predictive guidance and proportional navigation, which are essentially the same, employed a steering policy based on instantaneous interceptor response. In this paper the time response of the interceptor is approximated by a linear first order time... View full abstract»

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  • Comparison of Kalman and finite memory filtering for gun fire control applications

    Publication Year: 1978 , Page(s): 95 - 96
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (168 KB)  

    A finite memory filter is developed for gun fire control and compared to a Kalman filter. As opposed to the Kalman filter, the finite memory filter does not require a priori information concerning measurement or target noise statistics. In addition, the finite memory filter was implemented using a new recursive algorithm which dramatically reduces its computational burden. It is shown for gun fire... View full abstract»

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  • Application of robust filtering and smoothing to tracking data

    Publication Year: 1978 , Page(s): 97 - 98
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (166 KB)  

    Robust methods provide a fresh approach to the problem of treatment of wild observations in filtering and smoothing problems. The robust M-estimates of regression are extended to filtering and fixed lag smoothing employing a pseudodensity of the observations in a maximum likelihood derivation of the filter and fixed lag smoother. These robust methods have been applied to simulated and real trackin... View full abstract»

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  • Passive tracking of underwater maneuvering targets

    Publication Year: 1978 , Page(s): 99 - 103
    Request Permissions | Click to expandAbstract | PDF file iconPDF (290 KB)  

    The problem of passively tracking underwater maneuvering targets using time differentials of received sound waves is explored. The paper next develops a two-dimenslonal, adaptive tracking algorithm that gives an unbiased range estimate as a target makes random step changes in radial velocity. View full abstract»

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  • Development of an AAA gunner model based on reduced-order observer theory

    Publication Year: 1978 , Page(s): 104 - 112
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (578 KB)  

    A systematic study of threat effectiveness for anti-aircraft artillery (AAA) systems requires the development of a mathematical model for the gunner's tracking response. An anti-aircraft gunner model based on the Luenberger reduced-order observer theory is developed in this paper. It is composed of three main parts - a reduced-order observer, a feedback controller, and a remnant element. The highl... View full abstract»

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  • Decision tree filters - a nonlinear approach to filtering for fire control applications

    Publication Year: 1978 , Page(s): 113 - 114
    Request Permissions | Click to expandAbstract | PDF file iconPDF (172 KB)  

    A new type filter, called a Decision Tree Filter, is developed that promises substantial performance benefits in a wide variety of applications. For gun fire control against a spectrum of maneuvering and non-maneuvering targets, a relatively simple Decision Tree Filter showed a performance improvement of 2 to 1 in hit probability and a 4 to 1 reduction in computation when compared to a Kalman filt... View full abstract»

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  • Asymptotic analysis of a class of nonlinear filtering problems - Part I: A generic example

    Publication Year: 1978 , Page(s): 115 - 120
    Request Permissions | Click to expandAbstract | PDF file iconPDF (371 KB)  

    A class of nonlinear estimation problems are considered for systems involving Markov processes. The systems are parameterized by ϵ ! 0 so that their solutions are asymptotic (weakly) to diffusion processes. When the latter are Gauss - Markov processes to which the Kalrnan-Bucy filtering algorithm applies, we compute formal power series (in ϵ) for the conditional densities in terms ... View full abstract»

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  • Asymptotic analysis of a class of nonlinear filtering problems-Part II: A general formulation

    Publication Year: 1978 , Page(s): 121 - 126
    Request Permissions | Click to expandAbstract | PDF file iconPDF (411 KB)  

    Generic examples from a class of nonlinear estimation problems involving parameterized Markov processes are formulated so that each is close to a linear, Kalman-Bucy filtering problem for a limited range of the parameter. Based on this approximation, an asymptotic analysis of each problem is outlined starting from the differential equation for the conditional density of the message given the obser... View full abstract»

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  • A distributed filter derivation without Riccati equations

    Publication Year: 1978 , Page(s): 127 - 129
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    This paper considers "frequency domain" methods for the derivation of Kalman-Bucy filters for a certain class of distributed systems. An integral representation for the optimal stationary filter gains is derived using Wiener-Hopf techniques, avoiding consideration of distributed Riccati equations. View full abstract»

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