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  • Observability and information structure of nonlinear systems

    Creator:
    Hwang, Chun Sik
    Abstract:
    An observability problem for both deterministic and stochastic systems is studied here. Deterministic observability is a determination of whether every state of the system is connected to the observation mechanism and how it is connected, if connected. On the other hand, stochastic observability discusses the "tightness" of the connection in...
    Resource Type:
    Dissertation
    Full Text:
    version of this theorem in the nonlinear observability problem, appropriate algebraic modification of the

  • Nonlinear approach to the direction finding problem in array processing

    Creator:
    Ill-keun Rhee
    Abstract:
    In sonar or radar array processing, one of the most important objectives is to estimate the angles of incidence of distant source signals in a noisy environment. The standard eigenstructure-based method, which is known to yield high resolution spectral estimates for solving the direction finding problem, relies on the assumption...
    Resource Type:
    Dissertation
    Full Text:
    Nonlinear approach to the direction finding problem in

  • Bilinear stochastic processes and time series

    Creator:
    Tang, Zhigiang
    Abstract:
    In engineering, biology, ecology, medicine, economics and social science, some processes are essentially bilinear, and some could be approximated accurately by bilinear processes under certain conditions. In this thesis the bilinear stochastic process and bilinear time series are discussed. Bilinear models essentially are nonlinear; the superposition rule is not valid....
    Resource Type:
    Dissertation
    Full Text:
    processes under certain conditions. In this thesis the bilinear stochastic process and bilinear time series

  • Identification of stochastic systems with random parameters with particular reference to the recirculating lymphocytes in the immune system

    Creator:
    Farooqi, Zarreen H. H.
    Abstract:
    This thesis is composed of four parts: i) system description, ii) model development, iii) parameter estimation, and iv) validation. The natural system used here is an aspect of the immune system, namely, the distribution of recirculating lymphocytes in various organs throughout the body. This distribution gains importance because: i) it...
    Resource Type:
    Dissertation
    Full Text:
    interactions to be considered simultaneously in nonlinear biological processes create difficulties which

  • Nonlinear control of high performance aircraft

    Creator:
    Bean, Ronnie A.
    Abstract:
    This thesis presents the design of various controllers for a highly maneuverable, high performance aircraft, namely the modified F-18. The aircraft was required to perform high angle-of-attack maneuvers, for which the aircraft behaves in as a highly nonlinear system. An adaptive PID controller was used to control the aircraft through...
    Resource Type:
    Masters Thesis
    Full Text:
    angle-of-attack maneuvers, for which the air- craft behaves in as a highly nonlinear system. An

  • Nonlinear neural control with power systems applications

    Creator:
    Chen, Dingguo
    Abstract:
    Extensive studies have been undertaken on the transient stability of large interconnected power systems with flexible ac transmission systems (FACTS) devices installed. Varieties of control methodologies have been proposed to stabilize the postfault system which would otherwise eventually lose stability without a proper control. Generally speaking, regular transient stability is...
    Resource Type:
    Dissertation
    Full Text:
    - ficult. In general, the analytic solution of dynamic nonlinear systems is usually impossible so that

  • Neural network control of nonlinear discrete time systems

    Creator:
    Zakrzewski, Radoslaw Romuald
    Abstract:
    The main focus of this work is on the problem of existence of nonlinear optimal controllers realizable by artificial neural networks. Theoretical justification, currently available for control applications of neural networks, is rather limited. For example, it is unclear which neural architectures are capable of performing which control tasks. This...
    Resource Type:
    Dissertation
    Full Text:
    for use in the process of controller synthesis. The exist­ ing nonlinear control theory offers design

  • An optimal control approximation for a certain class of nonlinear filtering problems

    Creator:
    Halawani, Talal Umar
    Abstract:
    A new approximation technique to a certain class of nonlinear filtering problems is considered in this dissertation. The method is based on an approximation of nonlinear, partially-observable systems by a stochastic control problem with fully observable state. The filter development proceeds from the assumption that the unobservables are conditionally Gaussian...
    Resource Type:
    Dissertation
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    considered in this dissertation. The method is based on an approximation of nonlinear, partially-observable

  • Mathematical modeling and the control of immune processes with application to cancer

    Creator:
    Lee, Kwon Soon
    Abstract:
    A foundation for the control of tumors is presented, based upon the formulation of a realistic, knowledge-based mathematical model of the interaction between tumor cells and the immune system. The parametric control variables relevant to the latest experimental data, e.g., the sigmoidal dose-response relationship and Michaelis-Menten dynamics, are also considered....
    Resource Type:
    Dissertation
    Full Text:
    investigation is to obtain a better understanding of human immune processes and their role in tumor control by

  • Optimization of stochastic dynamic system with random coefficients

    Creator:
    Yi, Man Hyung
    Abstract:
    The problem of optimization of stochastic dynamic systems with random coefficients is discussed. Systems with both Wiener processes and uncertain random-process disturbances are dealt with in this dissertation, and these include certain bilinear stochastic systems. It is the purpose of this thesis to study the optimal control and, to some...
    Resource Type:
    Dissertation
    Full Text:
    processes in (3-2) have nonlinear observation equations; then, the optimal mean-square estimate of