摘要:

The one phase stochastic Stefan problem with random disturbance is expressed by using the stochastic variational inequality. The key idea in studying the existence and uniqueness properties of the solution of a stochastic variational inequality is the introduction of the theory of non-linear stochastic differential equations. The filtering equation under noisy observations is derived by applying the martingale representation technique. By using the finite difference approximation method, the derived non-linear filter equation is realized numerically and compared with simulation results.

ISSN:0020-7179    

DOI:10.1080/00207178808905991

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

We propose a globally stable finite spectrum assignment adaptive controller for systems with delay. It is assumed that the process is minimum phase, though not necessarily stable, and the delay is known. It is shown that the plant output asymptotically tracks a reference model output with all signals remaining bounded.

ISSN:0020-7179    

DOI:10.1080/00207178808905992

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This paper considers the stability properties of dynamical interval systems. Two new methods of determining an upper bound on interval perturbations are presented. One of the methods is applicable to both continuous and discrete systems.

ISSN:0020-7179    

DOI:10.1080/00207178808905993

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This paper present analgebraictheory for linear time-invariant multi-input multi-output systems with two-input two-output plant and compensator, using the factorization approach. This system configuration considered by Doyle and Nett is most general in that any interconnection of two systems can be represented in terms of this scheme. Other system configurations encountered in compensator design problems are special cases of this system configuration. The analysis and synthesis applies to continuous-time as well as discrete-time systems, and to lumped as well as distributed systems, since the algebraic setting is completely general. The compensator parametrization has four degrees of freedom. The paper is self-contained and is tutorial in the sense that it develops the main results of Nett without introducing the concept of containment.

ISSN:0020-7179    

DOI:10.1080/00207178808905994

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

A new characterization of infinite poles and zeros in terms of a natural extension of the idea of infinite elementary divisors of a matrix pencil to matrix polynomials is developed. It is used to show that two previous descriptions of infinite frequency structure are equivalent. Subsequently, a polynomial matrix transformation, which simultaneously preserves the finite and infinite zero structure, is presented.

ISSN:0020-7179    

DOI:10.1080/00207178808905995

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Delay-independent stabilization and decay rate assignability of linear systems with limited measurable state variables are considered. To construct control signals, 2n-dimensional linear systems including no delays are introduced. The conditions obtained for delay independent stabilization are contained in systems with measurable state presented previously. The conditions obtained for decay rate assignability for systems with measurable state variables are also sufficient for the present system.

ISSN:0020-7179    

DOI:10.1080/00207178808905996

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The main disadvantage of the standard recursive weighted least-squares algorithm is the unbounded increase in its gain matrix when the covariance vector is not sufficiently rich. We propose a general method for updating the gain matrix. This allows us to derive many new specific algorithms in which the boundedness of the gain matrix is ensured automatically.

ISSN:0020-7179    

DOI:10.1080/00207178808905997

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This paper is concerned with the problem of designing stabilizing controllers for linear systems containing uncertainty. The uncertainty is time-varying with values lying in a specified set and enters through the system matrix, through the input connection matrix and additively. A method is presented for obtaining a linear, state feedback controller which guarantees that the system response ultimately lies in a prespecified neighbourhood of the origin. In some situations, this neighbourhood can be made arbitrarily small and practical stability is achieved. The solution of an algebraic Riccati equation is used to generate the feedback gains for the linear controller. Several examples are included to illustrate the application of the method.

ISSN:0020-7179    

DOI:10.1080/00207178808905998

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

A companion paper (Young et al 1987) has introduced the concept of discrete-time, state variable feedback control systems based on non-minimal state-space (NMSS) representations, in which the state vector is defined solely in terms of the sampled inputs and outputs of the system. The present paper develops the theoretical background to this method of control system design and generalizes the approach to multi-input, single-output (MISO) systems.

ISSN:0020-7179    

DOI:10.1080/00207178808905999

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The following problem is considered: given a system which has tracking/disturbance signals arising from a class of periodic signals with periodT, say, assume that such a periodic signal haspdominant harmonic components contained in {ω1,l = 0, 1,…,v}. Then it is desired to find a finite-dimensional linear controller which gives exact robust asymptotic regulation for the case of sinusoidal signals with frequencies ω1,l = 0, 1,…,v, subject to certain controller gain magnitude constraints and/or gain margin tolerance constraints which may be imposed on the problem. This is called ‘the approximate robust servomechanism problem for periodic signals of the class {ω1,l = 0, 1,…,v}’. It is to be noted that such a problem cannot in general be solved by using high gain control synthesis methods. Existence conditions and a controller design method are given to solve the problem. A number of examples is given to illustrate the type of results that may be achieved.

ISSN:0020-7179    

DOI:10.1080/00207178808906000

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor