The paper is devoted to the scalar linear differential-difference equation of neutral type dx(t)/dt + p(t)dx(t - 1)/dt = a(t)x(t - 1) + b(t)x(t) + f(t). We study the existence of and methods for finding solutions poss...
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Because of increased requirements to the angular resolution of contemporary and perspective orbital telescopes, their large geometric dimensions elastic vibrations of the construction may exert substantial influence o...
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ISBN:
(纸本)9785900780801
Because of increased requirements to the angular resolution of contemporary and perspective orbital telescopes, their large geometric dimensions elastic vibrations of the construction may exert substantial influence on the quality of information received. In this situation, construction and investigation of the dynamic model of the telescope, which is equipped with an optic-electronic system of high resolution, becomes one of the main stages in its designing. The process of constructing of the mathematical model may be subdivided into the two stages. Stage one implies elaboration of the analytical (computational) model on the stage of system's designing. Stage two implies refining the structure, dimension and parameters of the analytical model. This is done because of the results of testing the article under the conditions, which are ultimately close to real exploitation conditions of the construction. Modeling of weightlessness in the process of testing the total construction on land represents a rather complicated problem [1]. The paper proposes a new approach to the problem of refining parameters of the analytical model based on the data obtained by the measuring system (MS), which allows measuring the current state of the construction in the process of its exploitation. This approach presumes decomposition of the process of adjustment of parameters of the computational model into the two stages. Stage one is the stage of model's identification: determination of its eigenfrequencies and dumping coefficients from the data obtained by the measuring system under the conditions of either real construction's exploitation or experimental exploitation of its field-oriented sample. Stage two, which implies correction of the computational model, presumes refining of its parameters on the basis of results of the identification, while proceeding from the conditions minimal corrections. The technique of correcting the matrices of coefficients of the linear model in the state
An approach to devising the upper level of controlsystems for multiagent systems has been developed. Problems related to automation of action planning, including those bound up with the mode of cooperative mission pe...
An approach to devising the upper level of controlsystems for multiagent systems has been developed. Problems related to automation of action planning, including those bound up with the mode of cooperative mission performance, are considered. A new efficient logic apparatus for intelligent control is proposed.
The problem of automatic defect recognition and classification for vision systems development is addressed. The main objectives of such systems are defect recognition and classification based on known features. The cl...
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The problem of automatic defect recognition and classification for vision systems development is addressed. The main objectives of such systems are defect recognition and classification based on known features. The classification function is designed using cluster analysis. Two stages approach is proposed. On the first offline stage of classification a teaching process has been employed. On the second online stage inspection image is classified using its features comparison with the closest medians in real time. Comparative analysis with the state-of-the-art classification methods has demonstrated an efficiency of the proposed approach. Examples described here relate specifically to semiconductor industry but can be adopted to other manufacturing processes.
The capacitated p-median problem (CPMP) consists of finding p nodes (the median nodes) minimizing the total distance to the other nodes of the graph, with the constraint that the total demand of the nodes assigned to ...
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We consider the minimization problem of an integral functional in a separable Hilbert space with integrand not convex in the control defined on solutions of the controlsystem described by nonlinear evolutionary equat...
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We consider a construction program control problem for orbital telescope under restrictions and parameters and structure uncertainty of its dynamic model. The calculation of needed control is based on stable to input ...
ISBN:
(纸本)9785900780672
We consider a construction program control problem for orbital telescope under restrictions and parameters and structure uncertainty of its dynamic model. The calculation of needed control is based on stable to input data small errors direct technique of approximate solutions construction of route problems for controllable nonlinear systems. The modified variant of iteration algorithm calculation realization for direct technique has the structure that enables to rebuild algorithm on each calculation step by previous iteration results. Such algorithm construction enables to compute program controls for wide spectra of input data under problem statement with minimal step number. By numerical research we show that "direct" control obtained with a help stable in Tichonov sense direct technique computational algorithm for orbital telescope model as a single solid provides needed accuracy of motion realization for telescope model with non-rigid solar batteries panels and perturbed dynamical characteristics.
The topological-algebraic characteristics of ordinary and distributed linear differential extensions are studied, and a qualitative analysis is carried out of the existence of strong differential (A, B)-models realize...
The categories of the vocabulary of the a posteriori mathematical modeling of dynamical systems are formalized which enable us to apply the conventional approach to studying the existence of strong irrefutable (A, B)-...
Two control problems for a state-linear controlsystem are considered: the minimization of a terminal functional representable as the difference of two convex functions (d.c. functions) and the minimization of a conve...
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