摘要:

This paper first completes an investigation started by Bell and Turpin (1981). It is shown that for a general second-order system with a drift term and for which parameter values are q = 1, m = 2, McDanell's conjecture is correct. Following this, a statement is given of all necessary conditions that must be satisfied at a junction in order for a counter-example to the conjecture to exist. These conditions prove to be consistent, indicating that it is worth continuing the search for such a counterexample

ISSN:0020-7179    

DOI:10.1080/00207178708933954

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

A new method for order reduction of singularly perturbed discrete systems is derived. The discrete system is reduced to its dominant and parasitic parts. This method can exactly exhibit the responses of the original system. For control law design, the linear model-following control (LMFC) method is applied. The order of the model is chosen the same as that of the dominant part of the plant, i.e. we apply to the plant with and without parasitics the same LMFC law. The conditions for reduced-order LMFC systems are derived and some simulation results are illustrated

ISSN:0020-7179    

DOI:10.1080/00207178708933955

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

The concepts of strategic sensors and actuators are introduced for a class of distributed parameter systems. This emphasizes the spatial structure and location of the sensors and controls in order that observability and controllability can be achieved.

ISSN:0020-7179    

DOI:10.1080/00207178708933956

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

The problem of obtaining the correct optimal steady-state operation of an industrial process, despite the deficiencies in its available mathematical model, is addressed in the paper. The control method considered is the integrated system optimization and parameter estimation (ISOPE) technique, and a new algorithm, of Newton-like type, is presented in the paper for this technique. The algorithm is derived for the augmented version of the ISOPE technique and hence it is also applicable for non-convex problems. The algorithm does not require more measurement information than the previous simple relaxation-type algorithms. It is convergent in one iteration for the case of a linear process and quadratic performance function. A local convergence analysis is provided for the general non-linear case. Simulation results are also given, and comparison with the relaxation type algorithm is presented, indicating the superiority of the new approach for the examples considered

ISSN:0020-7179    

DOI:10.1080/00207178708933957

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

An iterative algorithm, developed by the authors to compute the finite zeros of a linear multivariable system (Sebakhy et al. 1983), is extended to compute the infinite zeros of the system as well. The method is simple, efficient and suitable for programming on a digital computer

ISSN:0020-7179    

DOI:10.1080/00207178708933958

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

The notion of dynamic block relative gain (DBRG) is introduced and new results on stability and performance of decentralized control structures are presented

ISSN:0020-7179    

DOI:10.1080/00207178708933959

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

There are two different conditions for the delay-independent stabilization of linear systems by means of state variable feedback including no delays, one of which is also sufficient for decay rate assignability. In this paper a wider condition is presented for delay-independent stabilization. It is proved that this condition includes the conditions so far obtained

ISSN:0020-7179    

DOI:10.1080/00207178708933960

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Robustness properties of the optimal regulator for systems with delays in the state are characterized: first, a Nyquist stability criterion is developed and the circle condition of the optimal regulator is derived. On the basis of these results, the stability margin of the optimal regulator is evaluated as by Lehtomaki el al. (1981), and it is shown finally that the stability margin is equal to that in the finite-dimensional case

ISSN:0020-7179    

DOI:10.1080/00207178708933961

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Constant-gain linear observer design is utilized to reconstruct the state vector of stochastic systems with both multiplicative and additive noises. It is shown that if the system model is mean square stable, then it is very easy to design an effective estimation scheme

ISSN:0020-7179    

DOI:10.1080/00207178708933962

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

More relationships that exist among stabilizability conditions of controllers designed for a class of discrete non-linear stochastic systems are described. The conditions are in terms of both mean square and almost sure asymptotic stability of the controlled systems and provide converse results to those presented earlier

ISSN:0020-7179    

DOI:10.1080/00207178708933963

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor