摘要:

The well-known symmetry principles and group theoretic methods of mathematical physics are applied, from a control point of view, to the analysis of linear distributed parameter systems (LDS) endowed with some degree of geometric symmetry.

ISSN:0020-7179    

DOI:10.1080/00207178208932881

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Two non-linear feedback problems are considered. In one, a non-linear plant of net order e, with highly uncertain parameters, is subjected to external disturbances of bounded magnitude, and of bounded variation over any finite interval [0, T]. It is shown how causal LTI (linear time invariant) compensation can guarantee the resulting output y(t), and its derivatives y(u)(t) for u≤e-1 can be made arbitrarily small in magnitude. The applicable non-linear class is greatly increased by use of non-linear compensation. Owing to the finite [0, T] interval, there is no theoretical difference between minimum and non-minimum-phase plants, both for LTI and nonlinear systems.

ISSN:0020-7179    

DOI:10.1080/00207178208932882

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

This report describes a development in the recursive analysts of multivariate time-series using instrumental variables to relate inputs and outputs. At each sampling instant the set of inputs is split into discrete subsets, each having a separate matrix transfer function relationship with an associated vector of instrumental variables. The analysis is simplified when the input subsets are mutually uncorrelated. The vector of outputs is related to the sum of the concurrent vectors of instrumental variables. Tests of the new algorithm on simulated time-series resulted in satisfactory parameter estimates in most cases.

ISSN:0020-7179    

DOI:10.1080/00207178208932883

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0020-7179    

DOI:10.1080/00207178208932884

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0020-7179    

DOI:10.1080/00207178208932885

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor