摘要:

By regarding system compensation as the manipulation of the asymptotic directions and pivots of the root locus of the closed-loop multivariable system, the paper describes a general framework for the construction of forward path and minor loop compensation elements for a square, invertible plant with a transfer-function matrixG(s). The approach is based on the use of dynamic transformations ofGand the properties of the inverse plantG−1.

DOI:10.1049/piee.1979.0130

出版商:IEE    

年代:1979

数据来源: IET

摘要:

Recent work on the application of complex-variable theory to the analysis of linear multivariable systems has led to a design philosophy that integrates the frequency-response and the root-locus approach. A brief discussion of the 2-stage design technique that derives from this philosophy is first undertaken, and its application to a 3-input/3-output model of a once-through boiler is considered. On the face of lack of excess measurements an outer-loop design study only is carried out where frequency-response techniques are employed for the adjustment of the open-loop characteristic properties of the system. Through the use of the approximately commutative controller, it is shown that it is possible to gain/phase compensate the system characteristic gain using classical lead/lag and proportional plus integral controllers. The overall control scheme results in a system whose response is fast, nonoscillatory, accurate in the steady state and largely nonovershooting and noninteractive.

DOI:10.1049/piee.1979.0131

出版商:IEE    

年代:1979

数据来源: IET

摘要:

The problem of pole assignment using state feedback or output feedback is examined. A new algorithm for the design of fullrank minimum degree output-feedback compensators is presented, and results in a unification of previously obtained results.

DOI:10.1049/piee.1979.0132

出版商:IEE    

年代:1979

数据来源: IET

摘要:

The ‘characteristic locus design method’ is essentially a complex-variable approach, which relies heavily on algebraic-function theory for its rigorous foundation. In the paper, a summary is given of results developed during the past three years from an algebraic-function theoretic approach to the analysis of multivariable feedback systems.

DOI:10.1049/piee.1979.0133

出版商:IEE    

年代:1979

数据来源: IET

摘要:

This is an expository paper devoted to surveying and explaining some of the basic concepts required, and the motivations for, the definition and use of dyadic expansions in systems analysis and controller design. Where possible, the material is related to the inverse Nyquist array and characteristic locus design methods.

DOI:10.1049/piee.1979.0134

出版商:IEE    

年代:1979

数据来源: IET

摘要:

The paper describes and critically assesses, in the light of recent advances, the sequential return difference method for the computer-aided design of linear multivariable control systems. In this method, a sequence of single-loop designs, using classical procedures, yields a multivariable design satisfying various criteria such as stability, disturbance attenuation, low interaction and integrity.

DOI:10.1049/piee.1979.0135

出版商:IEE    

年代:1979

数据来源: IET

摘要:

The paper describes a computer-aided-design procedure which may be used to design,inter alia, multivariable control systems which satisfy constraints on peak overshoot of step response on control magnitudes, control rates and on states, as well as conventional constraints.

DOI:10.1049/piee.1979.0136

出版商:IEE    

年代:1979

数据来源: IET

摘要:

A new version of the method of inequalities is developed for the design of feedback control systems that have nonlinear and multivariable characteristics and are subject to disturbances. The system is required to behave in accordance with a criterion which takes the form of a prescribed bound on each component of the error vector.

DOI:10.1049/piee.1979.0137

出版商:IEE    

年代:1979

数据来源: IET

摘要:

A number of relationships between the geometric and the algebraic linear system theory are briefly surveyed, which may be discussed in terms of the classical theory of matrix pencils. The input-output pencil is defined and used for the characterisations of the geometrical concepts of (A, B)-invariant subspace, controllability subspace and transmission subspace. The problem of finding the maximal (A, B)-invariant and maximal controllability subspaces contained in another subspace is finally reduced to a problem of analysing the structure of a particular pencil, the restriction pencil. A common theme running through all the analyses is the use of the canonical forms of Weierstrass and Kronecker.

DOI:10.1049/piee.1979.0138

出版商:IEE    

年代:1979

数据来源: IET

摘要:

The design of controllers for multivariable systems, in particular large-scale systems, requires knowledge and exploitation of the structural properties of the systems. The ability to achieve certain structural properties, e.g. regulation, tracking, noninteraction, disturbance, rejection etc., can be determined on the basis of a small number of basic system concepts. In this paper, structural decomposition of a multivariable system is studied using the concept of a controllability subspace, and a review of recent work to investigate this concept is given.

DOI:10.1049/piee.1979.0139

出版商:IEE    

年代:1979

数据来源: IET