No. 6, 2005
Abstract. Architectural layers of a production management system are defined with the focus on the generalization and structuring of enterprise asset management (EAM) systems knowledge. The functions of such systems are listed, namely, equipment condition reports development based on raw data, scheduled and unscheduled maintenance planning based on secondary data, etc. A substantiation is adduced of EAM attribution to MES level. Some MES software tools popular in domestic market are discussed and the results of their comparative analysis are presented.
Analysis and Design of Control Systems
Abstract. The inversion problem for dynamic systems governed by nonlinear differential equations with smooth functions is investigated. Sufficient conditions of inversion existence are formulated. A relationship is established between the function algebra structures involved in problem solution and the mathematical structures used within the differential-geometric approach. Affine systems inversion technique is proposed.
Abstract. The paper interrelates the solvability theorem for nonlinear integral Hammerstein equation and the convergence of formal minimum residual technique. The convergence theorem for successive approximations method under kernel and nonlinearity constraints is proved.
Optimization Methods in Control
Abstract. The paper addresses the problem of capacity planning for a production system of intangible products that can be interpreted as an open queuing network. The capacity is controlled through a number of parallel uniform servers and buffer capacity at each processing node. More specifically, an optimization model is presented that complies with resource utilization, production cycle, and cooperation levels under budget constraints. The proposed heuristic algorithm combines analytical modeling with discrete-event simulation. The approach is illustrated by a printing industry example.
Abstract. The potentiality property for a class of nonlinear optimal systems with replenished scalar resource is proved. A numeric algorithm of such systems optimization is proposed that is used to create optimal strategies of creative abilities development in process of research activities.
Control in Social and Economic Systems
Abstract. Optimal investment and consumption strategies of a financial market agent benefiting from intermediate consumption and/or terminal wealth are investigated. An explicit analytical characterization of the optimal portfolio (speculative demand for risky assets and a hedge portfolio) is derived in terms of risk premiums, stochastically evolving investment opportunities and investor’s utility function. The results demonstrate clearly what risks are to be optimally hedged and show how to finance a desired real consumption process by investing in nominal securities market.
Abstract. Inventory control problem for keen demand goods is investigated under a priori uncertainty of demand statistics. Two approaches to problem formalization and adaptive inventory control algorithms are offered. Control System Structure For Professional Testing Processes Sizykh N.V. The variants of control system structure for professional testing of experts are considered.
Abstract. An approach to the design of multi-level industrial safety control systems for chemical processes at all accident development is offered. The approach is based on risk analysis methodology and artificial intelligence techniques. The problem of optimal on-line industrial safety control of chemical processes under uncertainty conditions is defined and its solution technique based on neuron network models is proposed.
Abstract. The models of flow (cash, information, material, etc.) dynamics in complex systems comprised of many agents interacting with each other and the external environment are considered. The methods of Generic and detailed modeling techniques for internal dynamics of multi-agent systems are offered on the basis of mathematical tool (event flows algebra, indicator functions, matrix trees, Petri nets, and activity graphs). A method for graphical description of flow dynamics simulation results is also proposed.
Abstract. The paper discusses the concept of program-objective control as a tool for solving large-scale complexes management problems. A model of an information system automating the process of designs selection in the program-objective control loop is proposed. The system structure is described, and possible applications are outlined.
Abstract. The paper describes a simulation model that automates operator training at a chemical weapons disposal plant. An communication model underlying the interface between the mathematical process model and the training process model is offered.
Information Technologies in Control
Abstract. The principles of RFPP (Remote files package protocol) organization are described. The protocol was designed specifically for supporting distributed control system components interactions. It offers a range of interaction modes (remote processor calls, remote service via file package queues, server-to-server communications, etc) and ensures data loss protection. The main processing object is a “remote data sets package” capable to travel from server to server and to accumulate the results of distributed software components operation. The Techniques To Accelerate The Performance Of Collective Operations In MPI Standard Stetsyura G.G. The techniques for fast performance of MPI standard operations in the systems, which combine computations and data exchange, are discussed.
Abstract. The paper discusses the mathematical tool for describing single-phase systems with the most popular type of multiple random access – ALOHA. The variants with arbitrary distribution law of data call time and an opportunity of successful message transfer from several users simultaneously are investigated.