Wyniki wyszukiwania - BazTech

1

Technologies and intelligent systems for adaptive vibration control in rail transport

Aliev Telman, Babayev Tofig, Musaeva Naila, Mammadova Ana, Alibayli Elnur

Transport Problems

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2022

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T. 17, z. 3

31--38

EN

Vibration diagnostics is of particular importance in rail transport safety systems because the signals received from vibration sensors installed on rolling stock, bridges, tunnels, and other infrastructure objects have great diagnostic information potential. Despite this, in practice, there are cases when the adequacy of the results of the vibration control and diagnostics task is not ensured. The reason is that the sampling step of the vibration signal does not change when the train speed changes. Given the need to change the sampling interval depending on the train speed, this article proposes an adaptive technology for vibration signal sampling that allows the building of intelligent systems of adaptive vibration control of malfunctions in rail transport.

2

An investigation into vibration control of gear bearing systems

Saghafi Amin, Farshidianfar Anooshirvan

Archive of Mechanical Engineering

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2021

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LXVIII, nr 4

473--491

EN

Considering the importance of gear systems as one of the important vibration and noise sources in power transmission systems, an active control for suppressing gear vibration is presented in this paper. A gear bearing model is developed and used to design an active control gear-bearing system. Two possible configurations of control system are designed based on active bearing and active gear-shaft torsional coupling to control and reduce the disturbance affecting system components. The controller for computing the actuation force is designed by using the H-infinity control approach. Simulation results indicate that the desired controller can efficiently be used for vibration control of gear bearing systems.

3

Towards Autonomous Driving: Design of Smart Damper – Energy Harvester

Dzedzickis Andrius, Lenkutis Tadas, Makulavičius Mantas, Bučinskas Vytautas, Morkvėnaitė-Vilkončienė Inga

Pomiary Automatyka Robotyka

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2019

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R. 23, nr 4

19--24

EN

Majority of modern cars are equipped with standard suspension systems with hydraulic shock absorbers. They are reliable elements, but came to the limit of their possibilities to ensure reasonable level of vibration accelerations, when cars became lighter and diameters of the wheel rim and tires has big diameter. This paper provides possible solution for the modern car suspension systems with controlled damping and self-powering service and data transmission. Such dampers implements smart liquid and electrically realized damping force control. This paper focused on electrical properties of this type of shock absorbers. Provided experimental research use shock absorber – energy harvester of new design. All experiments performed on shock machine using produced by authors prototype of original design. Energy gaining performed using three similar prototypes with ferro-nanomagnetic liquid, permanent magnet core and ferromagnetic steel core. Obtained results provided in the graphical form as electric gain with open circuit and loaded by electric load.

PL

Większość nowoczesnych samochodów jest wyposażona w standardowe układy zawieszenia z hydraulicznymi amortyzatorami. Aktualnie stosowane amortyzatory są niezawodne, jednak nie umożliwiają dalszego rozwoju w odniesieniu do znacznych wartości przyśpieszeń drgań w lekkich samochodach o dużych średnicach felg i opon. Artykuł przedstawia nowe możliwości rozwiązań w nowoczesnych układach zawieszenia z kontrolowanym tłumieniem, autonomicznym zasilaniem oraz monitoringiem. Zaproponowane tłumiki zapewniają inteligentne, elektrycznie sterowaną siłę tłumienia. W pracy skupiono się na właściwościach elektrycznych zaproponowanych amortyzatorów cieczowych. Do badań eksperymentalnych wykorzystano opracowany przez autorów prototyp amortyzatora, a eksperymenty przeprowadzono na maszynie uderzeniowej. Pozyskiwanie energii z amortyzatora zrealizowano przy użyciu trzech podobnych prototypów z cieczą z nanocząstkami magnetycznymi na bazie żelaza, rdzeniem z magnesem trwałym i rdzeniem ze stali ferromagnetycznej. Uzyskane wyniki przedstawiono jako uzyskaną energię elektryczną zarówno w układzie z otwartym obwodem, jak i obciążeniem elektrycznym.

4

The control of stability of a column subjected to specific load

Sokół Krzysztof

Journal of Applied Mathematics and Computational Mechanics

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2019

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Vol. 18, nr 4

85--94

EN

In this paper the problem of vibration control of a multi-member column subjected to the specific load is investigated. The vibration control is realized with the use of the piezoceramic element in the form of a rod that is connected to the host structure by means of the pins strengthened by rotational springs. The Hamilton’s principle is used during formulation of the boundary problem. The results of the numerical simulations are focused on the correction of the characteristic curves shape at a different radius of the loading head.

5

Wyposażenie mostów i kontrola drgań

Stefaniak A.

Mosty

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2018

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nr 3/4

68--72

PL

W artykule przedstawiono urządzenia wyposażenia i kontroli drgań mostów. Szerzej opisano masowe tłumiki drgań oraz urządzenia tłumienia wiskotycznego.

EN

Every bridge must be designed in a way that enables it to deform in ranges anticipated by the designer and disables to develop excessive forces that could cause the structure overload. Bridge bearings, expansion joints, tuned mass dampers and viscous damping devices are special products aimed at conforming to the above design requirements. The article presents the devices of bridge equipment and vibration control. Tuned mass dampers and viscous damping devices have been described in detail.

6

MOPSO based multi-objective robust H2/H∞ vibration control for typical engineering equipment

Wei H., Jiang X., Da-Yong Z., Jian-Wei L., Ming-Yi H.

Engineering Transactions

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2015

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Vol. 63, iss. 3

341--359

EN

Vibration control is critically important for engineering equipment, and in modern industrial engineering active strategies with robust performance are often adopted. In traditional studies, a single-objective consideration is often taken into account when robust control is performed, while a simultaneous multi-criterial consideration is ignored. The study outlined in this paper focuses on typical equipment, namely machinery and sensitive equipment. Meanwhile, evaluation of robust performances based on feedback control is considered as the vibration control objective, and performance indexes using H∞ and H2 criterion are regarded as fitness functions. In addition, the latest intelligent algorithm – MOPSO (multi-objective particle swarm optimization) is used and the SPEA2 (strength Pareto evolutionary algorithm 2) is also introduced for comparison as a representative of evolution algorithm. Numerical results show that the Pareto frontier of MOPSO is much smoother and more uniformly distributed than SPEA2, and even more important is that MOPSO can obtain a unique, global and optimal solution gbest, which can avoid having to select just one from a group of equivalent solutions Finally, an analysis of factors which affect the norms is performed, and the numerical verification shows that the disturbance type (single input or multi input) can apparently affect the magnitude of norms, and this finding can provide a broader understanding of robust vibration control. This research proposes a novel multi-objective optimization strategy for robust vibration control, while the traditional approaches can and are still employed. In addition, advanced artificial intelligence plays an important role in vibration detection in engineering application.

7

Measuring equipment and software products in vibrodiagnostics

Lut M., Mrachkovskyy A., Taran V.

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

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2012

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Vol. 1, No 1

67-70

EN

Master data are expounded on the nature of vibration of electric machines and possibility of exposure of their defects with application of vibrodiagnostic methods.