#12 2003

Index of papers 2003

Krotov A.V., Brago E.N., Smirnov V.V. The problems of pulsating gas flow measurement with variable pressure differential method

The paper analyses complementary systematic error that arises in pulsating gas flow measurement with variable pressure differential method for 2 types of pulsations. It offers a way to eliminate the error at gas-measuring units. The way is based on correcting the pulsating gas flowrate with the help of a device that converts the signals of fast-response sensors measuring the pressure before the orifice plate and the pressure differential across it. The examples of gas flowrate correction for the pulsations of any given form are adduced.

Kizhaev S.A. Automation of extrusion process

The problems to be solved for automating the process of communication cables extrusion are formulated. Mathematical expressions needed to develop structural schemes for computation and adjustment of dielectric permittivity and porosity factor of cable insulation are presented. The implementation of a regulatory control system for porosity factor is described.

Ze’ldin Yu.M., Kovalyov A.A., Khomyakova Yu.A. Solving computational problems in SCADA

The problems of applying various-purpose computation tasks in SCADA systems are discussed. Practical examples of intelligent systems implementation in ATGS’s projects are adduced, such as leak search in oil-products pipeline and gas flowrate calculation at a gas-compressor station.

Il’ichev N.N., Zhuravlyov A.N. A hard-/software system for control and monitoring of gas supply modes

Functionality, architecture and destination of a hard-/software system for integrated supervision service are considered. The features of its application in Ivanovoregiongas PLC are described.

Antufiev V.A. Modernization of the 1st power-generating section at Kolskaya A-plant

The paper summarizes the modernization of information, alarm logging, emergency power supply and process inspection systems of STK-ER turbine generating units at the 1st power-generating section of Kolskaya A-plant.

Quo vadis – Ethernet?

The paper justifies the possibility and the advantages of applying Ethernet at the field level. It describes briefly the features of OPC DX communications protocol, the PROFInet concept and wireless information networks. The description is illustrated with the potentialities of modern equipment from Siemens.

Zakharenko V.A., Nikonenko V.A. A pyrometer for automation systems

Performance attributes and functional design of a pyrometric transducer developed by Etalon Pilot Plant based in Omsk, Russia are presented. The paper shows a way to apply this transducer as a temperature sensor.

News from Automation-2003 Exhibition

Discussing a subject…
Advance control technologies

Rotach V.Ya. The features of PID controller settings calculation in industrial control systems

The paper discusses the calculation of optimal PI and PID controller settings in process control systems in view of plant specificity, such as transportation lags and various random disturbances, partially non-measurable. The optimality criterion supplemented with an additional constraint on admissible small value of control error that is justified by practice. The paper shows that a simple optimality criterion can be used in such case, which minimizes the control error with respect to all inputs. The technique exempts from calculating input correlation functions that takes inadmissibly much of observation time. The criterion simultaneously minimizes both RMS error and its short-time overshoots beyond the admissible level.

Jaraghian M.A., Fokin A.L., Kharazov V.G. Robust stabilization algorithms development based on enhanced model of a control object

The paper discusses the robust system synthesis philosophy based on the method of model enhancement by filtering process variables for getting reference trajectories. These trajectories can be then used for special correction of system dynamics.

Zhirov M.V., Makarov V.V. Adaptive control of wine-making process with time-varying feedstock parameters

The paper considers and adaptive control system for wine-making process with time-varying feedstock parameters. The system uses an identifier in a feedback loop and a decision-making person in the outer control loop.

Bolkvadze G.R. Developing adaptive control systems for ferroalloy processes

The paper considers the identification-based synthesis of adaptive control systems for electric ferroalloy furnaces. It proposes to use a power vs. current relationship model as a basis for adaptive control aimed at attaining maximum power with minimum current intensity.

Ghershberg A.F., Musaev A.A. A mathematical model for dynamic optimization of production cycle control in oil refining

A mathematical model of production cycle control process in oil refining is proposed. The model is intended for solving various optimization problems. It is formulated in generic terms and based on Kalman’s state space concept.

Intelligent solutions for industrial automation

The recent trend of intelligent devices market growth is emphasized. The latest families of intelligent devices from ABB, Druck, Endress+Hauser, Emerson Process Management, and Moore Industries are presented.

Kargapol’tsev V.P. On heat and water meters calibration cost

Kharazov V.G. Automation-2003 exhibition in St.Petersburg

The paper presents the companies that take part in the autumn St.Petersburg event on regular basis and briefly describes the products presented by new participants.

Interview with Automation-2003 Director Mr. A.A.Metelitsyn

Moghilko R.N. RTSoft in power industry

Intelligent process automation systems