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In the paper optimal control of an R, L, C, G electric network chain is considered. For the unloaded RC-chain the gains of the proportional optimal controllers are calculated. The optimal value of the functional is given. The proposed method is alternative to the method of solving Riccati equations for the calculation of the optimal gains.
In the paper a novel approach to the structure identification of the lattice associative memory network is presented. In the investigated network B-spaline basis functions are used, and the network structure (i.e.a number, a distribution and a shape of the basis functions) is determined by means of a genetic algorithm. The proposed approach is partly able to make use of structural dependencies existing...
In the paper the usage of the Texas Instruments multiprocessor chip the TMS320C80 for the parallel image processing is described. In the real-time implementations of image processing algorithms the performance time is a critical parameter, so very often multiprocessor solutions must be used. The TMS320C80 is composed of one master RISC processor and four parallel DSP processors specialised for efficient...
In this paper switched-capacitor finite impulse response (SC FIR) filter structures are considered and developed. Their performance (i.e., general features, quality of operation, influence of parasitic capacitance, the chip area requirements, etc.) are analyzed and compared for various possible SC FIR structures. The comparisons are not only based on the method for the chip area estimation, proposed...
Simple lumped-distributed RC notch and band-pass filters are reminded. The uniform distributed RC line is replaced by a MOSFET operating in the strong inversion region. Output resistances of bias circuits are working as lumped resistors. Simple CMOS implementations of such filters are proposed and discussed. The analysis results are presented.
An algorithm for matrix D-symmetrizability verification is presented. Necessary and sufficient conditions for the D-symmetrizability of matrix convex combination are proved.
A new concept of the perfect singular observer for singular 2D systems is proposed. Sufficient conditions are established for the existence of the perfect observer for singular 2D linear systems. A procedure for design of the perfect obeservers is also derived.
This paper deals with the mathematical study of the problem of small oscillations of a liquid bridge with a free surface, held together by surface tension, between two rigid coaxial disks, under gravity zero, in the case of a spherical liquid bridge in the equilibrium position. The equation which gives the displacement of the free surface, is reduced to a variational equation. After a careful discussion,...
The paper presents a resonsnt dc/dc converter with a one-switch synchronous regulator and a Class E amplifier. The circuit diagram, its principle of operation and a theoretical analysis of a one-switch synchronous regulator and experimental results for resonant dc/dc converter are given. The persented one-switch synchronous regulator [1] is a modification of a two-switch synchronous regulator [2],...
The aim of this paper is to derive the model of thin elastic othotropic plates, which takes into account the first corrector in the asymptotic expansions of displacements and stresses. The method of asymptotic expansions combined with variational approach were used. In the case of isotrophy our results reduce to those obtained by Raoult [14].
The systems under consideration are governed by a set of first-order linear partial differential hyperbolic equations together with boundary conditions. The Lyapunov method is used to verify the stability of the initial-boundary value problem. Necessary and sufficient conditions for stability are obtained under the assumption that the matrix coefficients in the differential equations and in the boundary...
An implementation of a CMOS current-mode instantaneous companding integrator in strong-inversion is presented. The main advantage of the proposed circuit is its simplicity. Moreover, the frequency response of the integrator can be easily compensated. The operation of the circuit has been confirmed through simulations, conducted for [formula] n-well CMOS process.
The analysis of possibilities of self-replication of informatic programs and self-replication of the objects with their internal software has been derived. Based on nanotechnologies [2] and nanosystems [3] of informatics with the self-replication properties, the two conceptions -- self-replication of a program through generation of its own copy and passing over to copy activation; double recording...
It was shown in this paper that classical approach to the assessment of systems condition evolution can be much improved by special processing of observed symptoms of condition. When we have a large symptom data base, we can apply singular value decomposition (SVD) as the newest data mining procedure, to obtain a symptom and condition evolution model. By using SVD it is possible to have two additional...
The capabilities of computer analysis in optimisation and diagnostics of technical objects such as power industry turbosystems are indicated in the work. Based on the developed dynamical models of such objects an analysis of the influence of selected design parameters on the statistic and dynamic properties of the object has been conducted. Presented examples refer to real objects operating in Poland...
Diagnostic model of an object describes the relations between observed symptoms and their causes, i.e. the technical states of the object. Direct specification of such models is (quite) impossible due to the complex nature of these relations. This paper aims to inform the reader about the general idea of inverse diagnostic models. A special attention has been drawn to the application of known cause-effect...
The paper deals with a comprehensive methodology concerning knowledge acquisition on machinery for the purpose of expert systems suitable for aiding of diagnostic inference. The methodology includes selected methods of diagnostic knowledge representation, methods of knowledge acquisition from domain experts and from previously classified examples, methods of assessment of previously acquired knowledge...
Properties of man-machine systems can be described with the rate/effect-generation models. The paper is an effort to formulate and classify such models and to improve their rate/effect-generation characteristics owing to supervisory systems employed. It has been shown that applying the supervisory-and-therapeutic systems enables the range of performed utilitarian tasks to be extended.
The vibro-acoustics has found itself a permanent position among technical sciences. The basic tasks and problems formulated several years ago are successively supplemented. It might be clearly stated that this field of science will be further developing in the XXIst century. Regardless of many achievements several vibro-acoustic problems have not been yet solved and therefore investigations concerning...
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