The article is concerned with the experience of creation of automated control systems for ecologically conscious and safe resource-saving operation of machinery of the plants with uninterrupted cycle (Automated Control Systems of Safe Resource-saving operation and Maintenance of equipment - ACS SRSM™ - COMPACS®) on the basis of stationary systems for monitoring.
The created ACS systems enable elimination of harmful effect of human errors on the operation of technological systems, use of equipment during the whole operating life provided retention of its maintainability and production safety. In addition, ACS systems realize the strategy for minimal cost diagnostics and the technology of search and liquidating fundamental causes of equipment failures.
Kostyukov V.N. Automated systems for diagnostics and monitoring of resource-saving operation of equipment of oil-and-gas industry // CITOGIC. - 2000. - Volume 10. - Book 3. - M.: 2000. - p.22-35
The report deals with the problems of vibration analysis of machine equipment on the basis of the analysis of vibration parameter trends. Main modern methods of machine vibration analysis are based on the evaluation of vibration parameters and on the analysis of vibration signal spectra.
Harmonic analysis of the spectrum usually requires knowledge of an exact construction of a machine; and existing methods of vibration analysis and prediction of technical condition do not take into consideration harmful effect of the human factor. Reliability of evaluation of machine equipment condition can be increased considerably by the use of the laws of processes of destruction and operability loss.
The processes of pump-and-compressor unit degradation were researched at a number of Russian refineries by means of the COMPACS® stationary systems for vibration monitoring. The researches concerned showed that rates of operability loss differ at various machine assemblies.
Kostyukov A.V. Evaluation of machinery performability by vibration parameter trends // DYNAMICS OF MACHINE AGGREGATES: Proceedings of the 5th International Conference. - Gabcikovo (Slovak Republic), 2000. - p. 101-104
Vibroacoustic analysis is put to use in order to increase reliability and objectivity of condition monitoring of all bearings and reduction gear of wheel motor units of ER-2 electric multiple unit.
The COMPACS®-EXPRESS system ensures evaluation of current technical condition and prediction of future technical condition of the elements of wheel motor unit by the results of measurement of vibration parameters, determines quantitative characteristics of physical quantities used as diagnostic features, displays them on the screen as a special board which shows quantitative and qualitative characteristics of the feature.
At the same time built-in expert system displays on the screen text and graphical information on a technical condition of wheel motor unit according to the test results. A printing device records this information, and the test results are automatically archived in the form of test reports.
Implementation of the COMPACS®-EXPRESS system for vibration analysis enables to improve the quality of repair and reliability of electric stock.
Kostyukov V.N., Avilov V.D., Kharlamov V.V., Naumenko A.P. The COMPACS system of vibration analysis for evaluation of technical condition of rolling stock units // New technologies - to railway transport: human resource development, organization of transportation process, operation of technologies: collected articles with international participation (in 4 parts). - Omsk: OSTU, 2000. - Part 3 - p. 245-247
In order to ensure failure tolerance of a process system it is necessary to monitor the equipment degradation, diagnose and control the equipment condition by giving the personnel notifications concerning urgent immediate actions.
Reliability and service life of the units depend heavily on their vibration; and vibration, in turn, is determined by the errors in manufacture, assemblage, repair and mounting at the unit as well as by operational defects caused by wear, mistakes of maintenance personnel and faults of operating conditions of the unit. That determines the necessity of vibration analysis of equipment condition at all stages of its life-cycle: for evaluation of workmanship, repair and mounting at the unit, for evaluation of technical condition in operation due to wear, mistakes of maintenance personnel and violation of operating conditions of the unit.
During vibration analysis of even one process unit diagnostic information should be collected, processed, presented and transmitted to the personnel in appropriate form during short interval of time (5-10 minutes) determined on the one hand by the maximum speed of malfunction development, and on the other hand – by the necessity of timely detection of mistakes or negligence of maintenance personnel and violation of operating practices which causes the unit failure. Considerable information scope requires the use of only stationary systems for continuous vibration monitoring.
Kostyukov V.N. Vibration analysis and monitoring of the units of plants with uninterrupted cycle // DYNAMICS OF MACHINE AGGREGATES: Proceedings of the 5th International Conference. - Gabcikovo (Slovak Republic), 2000. - p. 95-100
The article presents the mechanism of unit vibration trends, which represent the mixture of gradual and discontinuous processes, and the mechanism of spreading of vibration spectrum in case of the unit degradation.
We proposed and tested the method of recursive synthesis of orthogonal diagnostic features that is invariant to the unit type. This method based on the blocks of spectral matrix realizes the concept of "collective recognition". In addition, we developed and tested deterministic models of unit performability and method of approximation of multimodal intensity of wear by Veibull-Gnedenko mixture of distributions.
The results obtained form the basis of the strategy for minimal cost diagnostics and enable significant reduction of costs and shortening of the period of implementation of the systems for condition monitoring of hazardous production facilities.
Kostyukov V.N. Synthesis of invariant diagnostic features and models of the unit condition for the purpose of diagnostics // Omsk Research Bulletin. - Omsk: 2000. - Issue 12. - p. 77-81
The main types of vibration signals used in the systems for equipment vibration analysis are the signals of vibration acceleration, vibration velocity, and vibration displacement. The parameters of these signals (RMS value, peak value) are in common use in different diagnostic and vibration-survey systems for equipment condition control.
In order to receive the required signal it is allowed to use appropriate sensor as an end device: piezoaccelerometer – for vibration acceleration parameter, inductive sensor of vibration velocity - for vibration velocity, displacement sensor – for vibration displacement.
But most devices and systems for vibration measurement use vibroaccelerometer as an end device, and the integration operations are used for acquisition of the signal of vibration velocity and vibration displacement.
Boychenko S.N. Algorithms for spectral integration of vibroacoustic signals for equipment vibration analysis // DYNAMICS OF MACHINE AGGREGATES: Proceedings of the 5th International Conference. - Gabcikovo (Slovak Republic), 2000. - p. 34-37
Vibroacoustic signal matrix reflecting the structure of diagnosed machine has been synthesized in the article. The matrix rows contain the spectrum components in different frequency bands, the matrix columns contain the components relating to certain classes of condition and types of defects of various kinematic couples, and residual 'noise' that reflect the principle of information completeness.
We considered spectral matrix conversions for the synthesis of diagnostic features, proposed the method and system for automatic recognition, which are invariant to machine construction, proposed an adaptive algorithm for recognition in conditions of a priori uncertainty, which enables recursive improvement of the machine construction by the parameters of its vibration.
The aspect, which is realized after considering the results of the synthesis of a spectral matrix of vibration signal, enters into invariance principle that is one of the bases of the strategy of minimum cost. The use of invariance principle in vibration analysis and diagnostic systems enables significant reduction of the implementation period.
Kostyukov V.N. Synthesis of a spectral matrix of machine vibration and its recognition for the purpose of diagnostics // Omsk Research Bulletin. - Omsk: 2000. - Issue 12. - p. 71-77
Russian refineries are used groups of ten thousand pumping units, basically centrifugal pumps, both Russian and foreign production. It’s power ranges from tens kilowatts to tens megawatts.
Technological settings of primary oil processing, catalytic cracking, catalytic reforming and others contains a different number of units, which ranges from groups of ten to hundred units depending on powers of settings. Specialists never raised doubts the necessity an anti-accident protection a powerful compressor and other unique machines, but not a pumps, which high concentration in modern technological settings however offen was reason of damages and other production troubles.
Really, if we take probability of pump trouble-free operation in day equal 0.99, then for the group of machines, containing 100 units, refusal probability close to 1, and the technological system herewith practically disabled. For reaching stability of a technological system to different perturbations, including failures of motor pumps, it is necessary to provide overseeing with the exterior on it exterior and interior factors describing its availability index of product, and control by its state by means of opportune acceptance of engineering and organizational measures.
Kostjukov V. N., Boychenko S.N., Kostjukov A.V. Vibration monitoring of pumps in Russian refineries // Mimosa Meeting 17, Scottsdale, Arizona, April 12-16, 1999
The introduction of ecologically clean resourse-keeping technology is the main demand of modern production especially in dangerous branches of industry such as oil-gas-refining, oil-chemical etc.
It's impossible to imagine oil-chemical production without reliable accident-free work of technological equipment. By means of computer vibration monitoring COMPACS® system we provide fundamentally new level of safe processes and machine maintenance based on the latest information technologies, saving large financial and personnel resourses.
Kostjukov V. N. Safe Maintenance of The Equipment is The Technology of The XXI Century - Russian Experience // Mimosa Meeting 17, Scottsdale, Arizona, April 12-16, 1999
The paper presents the model of quasi-periodic vibroacoustic signal intended for diagnostics of batch-type objects.
In addition, we synthesized generic diagnostic features describing technical condition of batch-type objects, which are invariant to its construction. It enables to shorten the period of experimental and survey work as well as the time required for gathering of the signal statistics in different conditions of the objects during the implementation of diagnostic systems.
Kostyukov V.N. Generic diagnostic model of vibroacoustic signal of batch-type objects // Omsk Research Bulletin. - Omsk, 1999. - Issue 6. - p. 37-41