Piezoelectric actuators in the active vibration control system of journal bearings

Tůma, Jiří; Šimek, Jiřı́; Mahdal, Miroslav; Pawlenka, Miroslav; Wagnerova, Renata

doi:10.1088/1742-6596/870/1/012017

Cited by 7 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These characteristics can also be found in other system variables such as vibrations [6][7][8]. Furthermore in the state of research many topics regarding bearing actuation with the goal to reduce the vibration of the powertrain are found [9][10][11][12][13]. These approaches and control concepts focus on control strategies.…”

Section: Electric Motormentioning

confidence: 99%

Classification and examples of next generation machine elements

Vorwerk-Handing

Gwosch

Schork

et al. 2019

Forsch Ingenieurwes

View full text Add to dashboard Cite

In order to fully exploit the potential of the rapidly progressing digitalisation of technical systems, it is necessary to provide reliable and significant process and condition related data. In this context, solutions are especially aspired to allow a simple integration into the surrounding system and to influence it as little as possible. The main challenges regarding the measurement of process and condition data in the operation and control of technical systems as well as in test environments are identified and presented at the beginning of this article. A promising approach to meet the resulting requirements is the integration of sensory functions into simple standardised machine elements. In order to facilitate the discussion and interdisciplinary development of machine elements with sensory functions, an extension of the existing classification of mechatronic machine elements is introduced and illustrated with examples. The introduced classification takes into account the classification according to Stücheli and Meboldt and is based on a comparison of conventional and mechatronic machine elements on a functional level with regard to the function structure. As a result, the three classes sensor carrying machine elements, sensor integrating machine elements and sensory utilizable machine elements are introduced and subsequently discussed in more detail on the basis of examples. Finally, an outlook is given on the main research areas with regard to the development of mechatronic machine elements. Key aspects include working principles and effects for application in mechatronic machine elements, system analysis with regard to load conditions, power supply of sensor and data processor in the environment of the machine element as well as data processing and signal transmission under typical environmental conditions of mechanical engineering.

show abstract

Section: Electric Motormentioning

confidence: 99%

Classification and examples of next generation machine elements

Vorwerk-Handing

Gwosch

Schork

et al. 2019

Forsch Ingenieurwes

View full text Add to dashboard Cite

show abstract

“…Examples of applications of these actuators can be found, for example, in publications [15][16][17][18]. The use of actuators that work on the piezoelectric principle for vibration suppression in two axes is described, for example, in articles [19][20][21]. Although these actuator applications are interesting in this overall overview, none of them directly corresponds to the application of vibration suppression of long, slender and massive structures such as machine tool rams.…”

Section: Introductionmentioning

confidence: 99%

Design of Two-Axial Actuator for Controlled Vibration Damper for Large Rams

et al. 2021

View full text Add to dashboard Cite

Machine tool rams are important constructional elements found on vertical lathes as well as on many other machines. In most cases, a machine tool ram constitutes an assembly with significant dynamic compliance that affects the machine’s ability to achieve stable cutting conditions. There are various solutions for increasing a machine tool ram’s stiffness and damping. This paper describes an innovative concept of a two-axial electromagnetic actuator for controlled vibration dampers with high dynamic force values. The described solution is purposefully based on the use of standard electric drives. As a result, the size of the actuator is easier to scale to the required application. The solution is designed as a spacer between the end of the ram and the head. The paper presents the actuator concept, construction design, current control loop solution and experimental verification of the controlled vibration damper’s function on the test ram in detail. The presented position measurement concept will enable the use of non-contact position sensors for motor commutation as well as for possible use in vibration suppression control. Applications can be expected mainly in the field of vibration suppression of vertical rams of large machine tools.

show abstract

“…To improve the operational efficiency of high-speed rotating machineries, there is a growing demand in the development of active bearing devices which could control the machine’s operation. Active bearing configurations consisting of hydraulic servo systems, 1 controlled lubrication mechanism through pad orifices, 2–7 variable impedance bearings 8,9 and bearing with piezoelectric pushers, 10–17 movable flexible sleeve 18–22 and adjustable pads 23–28 are developed by various researchers. These bearing configurations were designed to be implemented in industrial applications to overcome the limitations of conventional fluid film bearings in controlling the journal motion during operation.…”

Section: Introductionmentioning

confidence: 99%

“…The concept of movable bushing driven by piezoactuators was then experimentally tested by Tuma et al. 15,16 to identify the feasibility of the proposed method on eliminating the rotor instability problems. Tests on the rigid shaft supported by two controllable bearings indicated an improvement in the operational speed ranges of the rotor system.…”

Section: Introductionmentioning

confidence: 99%

Computational analysis of the steady state performance of an adjustable/controllable multi-pad bearing profile under LBP orientations

Hariharan

Pai

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

A theoretical model of a four-pad bearing profile with unique adjustable or controllable features is simulated in the present study by considering load directed between the pads. Radial and tilt adjustable mechanism of the four bearing pads can effectively control and modify the rotor operating behaviour. Inward and outward motions of the bearing pads result in the generation of narrow and broader convergent regions, which directly influences the fluid film pressures. In the theoretical analysis, load-between-pad (LBP) orientations and pad adjustment configurations are taken account of by employing a modified film thickness equation. The effect of load position in influencing the steady state behaviour of the four-pad adjustable bearing under varied pad displaced conditions is analysed in this study. The outcome of the analysis highlighted the effectiveness of four-pad adjustable bearing in improving the steady state performance by operating under negative adjustment conditions and with load acting on the bearing pads.

show abstract

Piezoelectric actuators in the active vibration control system of journal bearings

Cited by 7 publications

References 2 publications

Classification and examples of next generation machine elements

Classification and examples of next generation machine elements

Design of Two-Axial Actuator for Controlled Vibration Damper for Large Rams

Computational analysis of the steady state performance of an adjustable/controllable multi-pad bearing profile under LBP orientations

Contact Info

Product

Resources

About