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Letteratura scientifica selezionata sul tema "Vibration control"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 11 gennaio 2025

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Articoli di riviste sul tema "Vibration control"

Kłosiński, Jacek, Ludwik Majewski e Arkadiusz Trąbka. "Control of Two-Dimensional Vibrating System". Solid State Phenomena 164 (giugno 2010): 333–38. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.333.

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A strategy for control of a system of two electrical vibrators mounted onto the vibrating plate of a typical small table vibrator was discussed in the present paper. The aim of the considered control system is rapid positioning of counterbalances for ensuring achievement of the assumed directions of vibrations and loading forces (where , m is unbalanced mass, ω is angular velocity of the vibrator shaft, e is distance between the unbalanced mass and the vibrator rotary axis). The strategy of the control consists in setting of different directions of vibrator rotations together with controlled change of vibration frequency and amplitude. Numerical analysis was performed. The obtained results are presented in a graphical form.

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Oliinyk, O. Yu. "VIBRATION FREQUENCY DENSITY CONTROL METHOD IN VIBRATION CONDITIONS". METHODS AND DEVICES OF QUALITY CONTROL, n. 2(43) (24 dicembre 2019): 41–47. http://dx.doi.org/10.31471/1993-9981-2019-2(43)-41-47.

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The use of existing vibration frequency measuring instruments for monitoring technological parameters inside apparatus and equipment is limited due to the presence of vibrations and industrial noise. The lack of data on the use of part of the technological apparatus as flow resonators through the unexplored basic analytical equations for determining the amplitude-frequency characteristics of such resonators determined the direction of these studies. The article is devoted to studies aimed at establishing the relationship between the vibrational field of the resonator, which is used as part of the technological apparatus with a controlled environment, and its reaction in the form of a change in the frequency or amplitude of the resonator’s own vibrations, which carries information about the properties of the substance in the apparatus. The experimental setup diagram, experimental methodology, and data on determining the oscillation frequency of the resonator under vibration conditions for metallic (corrosion-resistant steel) and non-metallic (organic glass) resonators are presented. The curves obtained from the experimental values were approximated using linear and hyperbolic approximations. It was found that the use of hyperbolic approximation reduces the average approximation error by more than six times. It was found that the error of the hyperbolic approximation error does not exceed 0.022% for a metal resonator and 0.05% for an organic glass resonator. The conducted experimental studies confirm the presence of a determinate coupling of the measured frequency characteristics of the resonator with the density, which was measured inside the equipment. The obtained data was used to develop the scientific and methodological foundations of the vibrational frequency control method in conditions of vibration using a part of the device as a resonator of the vibrational frequency sensor.

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Fardelin, Gustav, Niklas Ricklund e Ing-Liss Bryngelsson. "Hand nerve function after mountain bike cycling". Journal of Science and Cycling 11, n. 3 (31 dicembre 2022): 23–32. http://dx.doi.org/10.28985/1322.jsc.10.

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Abstract (sommario):

Hand-arm vibrations can cause permanent injuries and temporary changes affecting the sensory and circulatory systems in the hands. Vibrational effects have been thoroughly studied within the occupational context concerning work with handheld vibrating tools. Less is known about vibrational exposure and risk of effects during cycling. In the present study, 10 cyclists were recruited for exposure measurements of hand-arm vibrations during mountain bike cycling on the trail, and the effects on the nerve function were examined with quantitative sensory testing (QST) before and after the ride. The intervention group was compared to a control group that consisted of men exposed to hand-arm vibrations from a polishing machine. The results of the QST did not statistically significantly differ between the intervention and study groups. The intervention group showed a lesser decrease in vibration perception in digitorum II, digitorum V, and hand grip strength than the control group. It was concluded that no acute effects on nerve function in the dominant hand were measured after mountain bike cycling on the trail, despite high vibration doses through the handlebars.

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Vasilyev, Andrey. "ANALYSIS OF THE FACTORS DECREASING THE EFFICIENCY OF OPERATION OF ACTIVE NOISE AND VIBRATION CONTROL SYSTEMS IN DUCTS AND THE WAYS OF IMPROVEMENT OF PROTECTION". Akustika, VOLUME 41 (2021): 205–9. http://dx.doi.org/10.36336/akustika202141205.

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The factors influencing on the active noise and vibration control system efficiency of operation and the ways of the system protection improvement are discussed. Analysis of factors decreasing the efficiency of operation of active noise and vibration control systems in ducts is showing that there are such factors as physical characteristics of operating medium (temperature, pressure, moisture, vibrations, dust), masking acoustic and vibrating interferences of other sources of noise and vibration etc., which may significantly reduce the efficiency, reliability and durability of active systems operation. The ways of improvement of protection of the elements of the active noise and vibration control system are discussed. Further improvement of active noise control and vibration system elements protection allows the system to operate with higher efficiency and reliability. Widely, achieving of good results in the solution of this problem helps us to extend the possibilities of active noise and vibration control systems practical application.

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Mistry, Yash Ashwin, e Kushagra Goel. "Surface Mounted Active Vibration Cancellation Device Using Raspberry Pi". ECS Transactions 107, n. 1 (24 aprile 2022): 19289–97. http://dx.doi.org/10.1149/10701.19289ecst.

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Abstract (sommario):

Active vibration cancellation device detects vibrations on a host surface using a piezoelectric vibration sensor, amplifies them using a signal amplifier, and sends them to a Raspberry Pi board implemented with PID control, responsible for signal processing, which further actuates Piezoelectric actuators vibrating at a phase difference of 180° to the vibrating surface (destructive interference) and reduces the vibrations over the surface. The device presented in this paper suggests an application that tries to make it accessible to a large group of people.

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Ryabov, Victor M., e Boris A. Yartsev. "Composite wing vibration coupling control". Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy 10, n. 2 (2023): 344–56. http://dx.doi.org/10.21638/spbu01.2023.214.

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The paper discusses the possibility to control coupled bending-twisting vibrations of composite wing by means of the monoclinic structures in the reinforcement of the plating. Decomposing the potential straining energy and kinetic energy of natural vibration modes into interacting and non-interacting parts, it became possible to introduce the two coefficients that integrally consider the effect of geometry and reinforcement structure upon the dynamic response parameters of the wing. The first of these coefficients describes the elastic coupling of the natural vibration modes, the second coefficient describes the inertial one. The paper describes the numerical studies showing how the orientation of considerably anisotropic CRP layers in the plating affects natural frequencies, loss factors, coefficients of elastic and inertial coupling for several lower tones of natural bending-twisting vibrations of the wing. Besides, for each vibration mode, partial values of the above mentioned dynamic response parameters were determined by means of the relationships for orthotropic structures where instead of “free” shearing modulus in the reinforcement plant, “pure” shearing modulus is used. Joint analysis of the obtained results has shown that each pair of bendingtwisting vibration modes has its orientation angle ranges of the reinforcing layers where the inertial coupling caused by asymmetry of the cross-section profile with respect to the main axes of inertia decreases, down to the complete extinction, due to the generation of the elastic coupling in the plating material. These ranges are characterized by the two main features: 1) the difference in the natural frequencies of the investigated pair of bendingtwisting vibration modes is the minimum and 2) natural frequencies of bending-twisting vibrations belong to a stretch restricted by corresponding partial natural frequencies of the investigated pair of vibration modes. This result is of practical importance because it enables approximate analysis of real composite wings with complex geometry in the existing commercial software packages.

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Liang, Hongyu, Zhigang Wu, Jifeng Hu, Yuannan Gan e Sheng Qiang. "Simulation Test of an Intelligent Vibration System for Concrete under Reinforcing Steel Mesh". Buildings 14, n. 8 (23 luglio 2024): 2277. http://dx.doi.org/10.3390/buildings14082277.

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Abstract (sommario):

Concrete vibration construction sustains high labor intensity, a poor working environment, difficulties in quality control, and other problems. Current research on concrete vibration focuses on monitoring vibration quality, evaluating vibration processes quantitatively, and assessing mechanical vibration of unreinforced mesh concrete (plain concrete). Standardizing concrete vibration under reinforcing steel mesh remains difficult. There is still a lag in the evaluation of the quality of rework and the consumption of human and material resources. To tackle these issues, a vibrating robotic arm system based on automation control technology, machine vision, and kinematic modeling is proposed. Research and simulation tests on intelligent concrete vibration under reinforcing steel mesh aim to enhance construction efficiency and quality. A five-degree-of-freedom robotic arm with a vision module identifies each rebar grid center in the image, extracts the pixel coordinates, and converts them to the mechanical coordinates by the integration of machine vision algorithms. A vibrator point screening algorithm is introduced to determine actual vibrator point locations based on specific insertion spacing, alongside a vibro-module for vertical movement. Real-time assessment of vibration quality is achieved using the YOLOv5 target detection model. Simulation tests confirm the feasibility of automated concrete vibration control under reinforcing steel mesh by a vibrating robot arm system. This research offers a new approach for unmanned vibration technology in concrete under reinforcing steel mesh, supporting future related technological advancements with practical value.

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Lian, Jijian, Yan Zheng, Chao Liang e Bin Ma. "Analysis for the Vibration Mechanism of the Spillway Guide Wall Considering the Associated-Forced Coupled Vibration". Applied Sciences 9, n. 12 (25 giugno 2019): 2572. http://dx.doi.org/10.3390/app9122572.

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During the flood discharge in large-scale hydraulic engineering projects, intense flow-induced vibrations may occur in hydraulic gates, gate piers, spillway guide walls, etc. Furthermore, the vibration mechanism is complicated. For the spillway guide wall, existing studies on the vibration mechanism usually focus on the vibrations caused by flow excitations, without considering the influence of dam vibration. According to prototype tests, the vibrations of the spillway guide wall and the dam show synchronization. Thus, this paper presents a new vibration mechanism of associated-forced coupled vibration (AFCV) for the spillway guide wall to investigate the dynamic responses and reveal coupled vibrational properties and vibrational correlations. Different from conventional flow-induced vibration theory, this paper considers the spillway guide wall as a lightweight accessory structure connected to a large-scale primary structure. A corresponding simplified theoretical model for the AFCV system is established, with theoretical derivations given. Then, several vibrational signals measured in different structures in prototype tests are handled by the cross-wavelet transform (XWS) to reveal the vibrational correlation between the spillway guide wall and the dam. Afterwards, mutual analyses of numeral simulation, theoretical derivation, and prototype data are employed to clarify the vibration mechanism of a spillway guide wall. The proposed mechanism can give more reasonable and accurate results regarding the dynamic response and amplitude coefficient of the guide wall. Moreover, by changing the parameters in the theoretical model through practical measures, the proposed vibration mechanism can provide benefits to vibration control and structural design.

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Fang, Mingxing, Lijun Wu, Jing Cheng, Youwu Du e Jinhua She. "Active Structural Control Based on Integration ofΗ∞Control and Equivalent-Input-Disturbance Approach". Journal of Advanced Computational Intelligence and Intelligent Informatics 20, n. 2 (18 marzo 2016): 197–204. http://dx.doi.org/10.20965/jaciii.2016.p0197.

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This paper describes an approach for suppressing earthquake-induced vibrations of building structures. The design of the control system is based on the equivalent-input-disturbance approach for improving the vibration rejection performance. A control system configuration with a vibration estimator is described, and a method of designing such a control system that employsΗ∞control is presented. The vibration rejection performance is guaranteed by the control structure, in which an equivalent vibration signal on the control input channel is estimated and directly incorporated into the control input. The validity of our method is demonstrated through simulations.

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Zhang, Ting, e Hongguang Li. "Adaptive modal vibration control for smart flexible beam with two piezoelectric actuators by multivariable self-tuning control". Journal of Vibration and Control 26, n. 7-8 (6 gennaio 2020): 490–504. http://dx.doi.org/10.1177/1077546319889842.

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It has been popular for decades that the vibrations of space structures are suppressed with smart actuators. However, the higher mode vibrations are often motivated when a control strategy is applied to attenuate the vibration for the smart structures. Moreover, if the multi-mode vibration of a smart structure is suppressed with multi-actuators, a proper multivariable control law will be adopted to solve the coupling problem caused by the multi-actuators of the smart structure. Therefore, in the paper, a decoupling technique for two modal vibrations of a smart flexible beam with two piezoelectric patches is adopted by adaptive control. The proposed control law is designed with a multivariable minimum variance self-tuning control. Considering the first two orders of modal vibrations, two piezoelectric patches are configured on the flexible beam according to the strain of the first two orders of modal vibrations along the longitudinal direction of the beam. A dynamical model for the flexible beam with two piezoelectric actuators is constructed by the mode superposition method. With the dynamical model, simulations are implemented to suppress the free vibration of the flexible beam. Moreover, experiments are carried out to verify the effectiveness of the multivariable minimum variance self-tuning control for vibration suppression of the flexible structure. The control results clearly show that the free vibration amplitude of the cantilevered beam with two control voltages applied to the two piezoelectric patches is less than that with one control voltage applied to the first piezoelectric actuator. Thus, multivariable minimum variance self-tuning control is a more efficient approach for suppressing multimodal vibration for a smart flexible beam with two piezoelectric actuators compared with the conventional velocity feedback control.

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Più fonti

Tesi sul tema "Vibration control"

Kumar, Ashok. "Active structural-acoustic control of interior noise in vibro-acoustic cavities". Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7036.

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Rafique, Sajid. "Piezoelectric vibration energy harvesting and its application to vibration control". Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/piezoelectric-vibration-energy-harvesting-and-its-application-to-vibration-control(d9edcedf-054e-4921-9ba3-5e015b9bbd8f).html.

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Vibration-based energy harvesting using piezoelectric materials have been investigated by several research groups with the aim of harvesting maximum energy and providing power to low-powered wireless electronic systems for their entire operational life. The electromechanical coupling effect introduced by the piezoelectric vibration energy harvesting (PVEH) mechanism presents modelling challenges. For this reason, there has been a continuous effort to develop different modelling techniques to describe the PVEH mechanism and its effects on the dynamics of the system. The overall aims of this thesis are twofold: (1) a thorough theoretical and experimental analysis of a PVEH beam or assembly of beams; (2) an in-depth analytical and experimental investigation of the novel concept of a dual function piezoelectric vibration energy harvester beam/tuned vibration absorber (PVEH/TVA) or 'electromechanical TVA' and its potential application to vibration control. The salient novel contributions of this thesis can be summarised as follows: (i) An in-depth experimental validation of a PVEH beam model based on the analytical modal analysis method (AMAM), with the investigations conducted over a wider frequency range than previously tested. (ii) The precise identification of the electrical loads that harvest maximum power and that induce maximum electrical damping. (iii) A thorough investigation of the influence of mechanical damping on PVEH beams. (iv) A procedure for the exact modelling of PVEH beams, and assemblies of such beams, using the dynamic stiffness matrix (DSM) method. (v) A procedure to enhance the power output from a PVEH beam through the application of a tip rotational restraint and the use of segmented electrodes. (vi) The theoretical basis for the novel concept of a dual function PVEH beam/TVA, and its realisation and experimental validation for a prototype device. A thorough experimental validation of a cantilever piezoelectric bimorph energy harvester without a tip mass is presented under random excitation. The study provided a deep insight into the effect of PVEH on the dynamics of the system for variations in electrical load. An alternative modelling technique to AMAM, based on the DSM, is introduced for PVEH beams. Unlike AMAM, the DSM is exact, since it is based on the exact solution to the bending wave equation. It also readily lends itself to the modelling of beams with different boundary conditions or assemblies of beams of different crosssections. AMAM is shown to converge to DSM if a sufficiency of modes is used. Finally, an in-depth theoretical and experimental investigation of a prototype PVEHbeam/TVA device is presented. This device comprises a pair of bimorphs shunted by R-L-C circuitry and can be used as a tuned mass damper (TMD) to attenuate a vibration mode of a generic structure. The optimal damping required by this TMD is generated by the PVEH effect of the bimorphs. Such a device combines the advantages of conventional mechanical and electrical TVAs, overcoming their relative disadvantages. The results demonstrate that the ideal degree of attenuation can be achieved by the proposed device through appropriate tuning of the circuitry, thereby presenting the prospect of a novel class of 'electromechanical' tuned vibration absorbers.

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Gu, Zhiqiang. "Application of control methods to structural vibration control". Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499865.

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Jayasuriya, A. M. M. "Finite element modeling of blast vibrations and study of vibration control criteria". Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182438393.

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Heilmann, John. "A dual reaction-mass dynamic vibration absorber for active vibration control". Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-09182008-063315/.

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Alexander, BXS. "ROTOR POSITION AND VIBRATION CONTROL FOR AEROSPACE FLYWHEEL ENERGY STORAGE DEVICES AND OTHER VIBRATION BASED DEVICES". Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1218818393.

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Hirunyapruk, Chompoonoot. "Vibration control using an adaptive tuned magneto-rheological fluid vibration absorber". Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/65677/.

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Abstract (sommario):

An adaptive tuned vibration absorber (ATVA) can be used to suppress unwanted vibrations. If the excitation frequency is time harmonic but the frequency changes with time, it is desirable to retune the ATVA so that the natural frequency of the ATVA always coincides with the excitation frequency. One way of achieving this is to adjust the stiffness of the ATVA. The key challenge is to change the stiffness in real-time. Tunable fluids such as Magneto-Rheological (MR) fluids, whose properties can be controlled by a magnetic field, may be used to address this challenge. The subject of this thesis is an ATVA exploiting the changeable properties of MR fluids in the pre-yield state. The ATVA is designed as a three-layer beam with elastic face plates and MR fluuid in the core. Electromagnets are attached to the top and the bottom layers to generate a magnetic field. By varying the current supplied to the electromagnets, the shear stiffness of the MR fluid and hence the stiffness of the ATVA can be varied. The vibration characteristics of the ATVA as a function of the magnetic field strength are predicted by a finite element model together with an empirical model for the shear modulus of the MR fluid and a model for the magnetic field applied to the fluid. An MR fluid-filled ATVA was manufactured and tested to validate the predictions. This ATVA design allows the natural frequency to be changed by 40.6%. The self-tuning of the MR fluid-filled ATVA can be achieved by integrating an adaptive-passive controller with the ATVA so that its stiffness can be continuously adjusted in real-time. The control aims to drive the cosine of phase angle between the velocities of the host structure and the ATVA to zero. Various control algorithms, i.e. non-linear proportional, derivative, and proportional-plus-derivative controls, are investigated. Computer simulations and experimental results demonstrate that the MR fluid-filled ATVA is able to retune itself in the order of 0.2 seconds. The ATVA can also maintain the tuned condition within a reasonably wide frequency range between 110 and 146 Hz in the face of changes in the forcing frequency. The MR fluid-filled ATVA has the potential to substantially reduce vibration of a host structure. The proportional-plus-derivative control was found to be the best control approach for the ATVA.

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Red, Wing Rodney D. "Adaptive tuned vibration absorber". Thesis, This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-08252008-162250/.

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Wändell, Johan. "Multistage gearboxes : vibration based quality control". Licentiate thesis, KTH, Aeronautical and Vehicle Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3987.

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Abstract (sommario):

In this thesis, vibration based techniques for detection of localised surface damages in multistage gearboxes are presented and evaluated.

A modern vehicle gearbox is a complex system and the number of potential errors is large. For instance, surface damages can be caused by rough handling during assembly. Large savings can be made in the production industry by assuring the quality of products such as gearboxes. An automated quality test as a final step in the production line is one way to achieve this.

A brief review of available methods for vibration based condition monitoring of gearboxes is given in the opening summary. In the appended papers, a selection of these methods is used to design signal processing procedures for detection of localised surface damages in gearboxes. The procedures include the Synchronous signal averaging technique (SSAT), residual calculation, filtering with a prediction error filter (PEF) based on an AR-model and the use of crest factor and kurtosis as state features. The procedures are fully automatic and require no manual input during calibration or testing. This makes them easy to adapt to new test objects.

A numerical model, generating simulated gearbox vibration signals, is used to systematically evaluate the proposed procedures. The model originates from an existing model which is extended to include contributions from several gear stages as well as measurement noise. This enables simulation of difficulties likely to arise in quality testing such as varying background noise and modulation due to test rig misalignment. Without the numerical model, the evaluation would require extensive measure-ments. The numerical model is experimentally validated by comparing the simulated vibration signals to signals measured of a real gearbox.

In the experimental part of the study, vibration data is collected with accelerometers while the gearbox is running in an industrial test rig. In addition to the healthy condition, conditions including three different surface damage sizes are also considered.

The numerical and the experimental analysis show that the presented procedures are able to detect localised surface damages at an early stage. Previous studies of similar procedures have focused on gear crack detection and overall condition monitoring. The procedures can handle varying back-ground noise and reasonable modulation changes due to misalignment.

The results show that the choice of sensor position and operating conditions during measure-ments has a significant impact on the efficiency of the fault detection procedures. A localised surface damage excites resonances in the transfer path between the gear mesh and the accelerometer. These resonances amplify the defect signal. The results indicate that it is favourable to choose a speed at which the resonant defect signals are well separated from the gear meshing harmonics in the order domain. This knowledge is of great importance when it comes to quality testing. When a quality test procedure is being developed, it is often possible to choose the operating conditions and sensor positions. It can in fact be more important to choose proper operating conditions than to apply an optimal signal processing procedure.

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Ulker, Fatma Demet. "Active Vibration Control Of Smart Structures". Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1098409/index.pdf.

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Abstract (sommario):

The purpose of this thesis was to design controllers by using H1 and ¹
control strategies in order to suppress the free and forced vibrations of smart structures. The smart structures analyzed in this study were the smart beam and the smart ¯
n. They were aluminum passive structures with surface bonded PZT (Lead-Zirconate-Titanate) patches. The structures were considered in clamped-free con¯
guration. The ¯
rst part of this study focused on the identi¯
cation of nominal system models of the smart structures from the experimental data. For the experimentally identi¯
ed models the robust controllers were designed by using H1 and ¹
-synthesis strategies. In the second part, the controller implementation was carried out for the suppression of free and forced vibrations of the smart structures. Within the framework of this study, a Smart Structures Laboratory was established in the Aerospace Engineering Department of METU. The controller implementations were carried out by considering two di®
erent experimental set-ups. In the ¯
rst set-up the controller designs were based on the strain measurements. In the second approach, the displacement measurements, which were acquired through laser displacement sensor, were considered in the controller design. The ¯
rst two °
exural modes of the smart beam were successfully controlled by using H1 method. The vibrations of the ¯
rst two °
exural and ¯
rst torsional modes of the smart ¯
n were suppressed through the ¹
-synthesis. Satisfactory attenuation levels were achieved for both strain measurement and displacement measurement applications.

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Più fonti

Libri sul tema "Vibration control"

Conference on Mechanical Vibration and Noise (11th 1987 Boston, Mass.). Vibration control and active vibration suppression. New York, N.Y. (345 E. 47th St., New York 10017): American Society of Mechanical Engineers, 1987.

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Inman, Daniel John. Vibration with Control. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119375081.

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Inman, Daniel J. Vibration with Control. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470010533.

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Inman, Daniel J. Vibration with Control. New York: John Wiley & Sons, Ltd., 2006.

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Vuolio, Raimo. Blast vibration: Threshold values and vibration control. Helsinki: Finnish Academy of Technology, 1990.

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Genta, Giancarlo, a cura di. Vibration Dynamics and Control. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-79580-5.

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Wagg, David, e Simon Neild, a cura di. Nonlinear Vibration with Control. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-2837-2.

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Jalili, Nader. Piezoelectric-Based Vibration Control. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-0070-8.

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Wagg, David, e Simon Neild. Nonlinear Vibration with Control. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-10644-1.

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Takács, Gergely, e Boris Rohaľ-Ilkiv. Model Predictive Vibration Control. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2333-0.

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Capitoli di libri sul tema "Vibration control"

Foreman, John E. K. "Vibration and Vibration Control". In Sound Analysis and Noise Control, 164–90. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-6677-5_6.

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Huang, Jie. "Vibration Control". In Nonlinear Dynamics and Vibration Control of Flexible Systems, 21–46. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003247210-2.

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Moretti, Peter M. "Vibration Control". In Modern Vibrations Primer, 399–404. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003574064-47.

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Hagedorn, P. "Mechanical Vibrations and Vibration Control". In Passive and Active Structural Vibration Control in Civil Engineering, 1–78. Vienna: Springer Vienna, 1994. http://dx.doi.org/10.1007/978-3-7091-3012-4_1.

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Novillo, Ernesto. "Vibration Isolation". In Vibration Control Engineering, 221–50. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003175230-11.

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Novillo, Ernesto. "Vibration Absorption". In Vibration Control Engineering, 251–84. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003175230-12.

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Novillo, Ernesto. "Vibration Control Techniques". In Vibration Control Engineering, 285–302. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003175230-13.

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Bitmead, Robert R. "Helicopter Vibration Control". In Iterative Identification and Control, 211–23. London: Springer London, 2002. http://dx.doi.org/10.1007/978-1-4471-0205-2_10.

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Michael Sinapius, Johannes, Björn Timo Kletz e Steffen Opitz. "Active Vibration Control". In Adaptronics – Smart Structures and Materials, 227–329. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-61399-3_6.

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Xu, You-Lin, e Jia He. "Structural vibration control". In Smart Civil Structures, 389–448. Boca Raton : Taylor & Francis, CRC Press, 2017.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315368917-16.

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Atti di convegni sul tema "Vibration control"

Krott, Matthew, Edward Smith e Christopher Rahn. "Experimental Validation of Multi-Mode Tailboom Passive Vibration Control Using Fluidic Flexible Matrix Composite Tubes". In Vertical Flight Society 73rd Annual Forum & Technology Display, 1–11. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12048.

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Abstract (sommario):

Helicopter tailboom vibrations are easily excited and decay slowly due to the tailboom's low inherent structural damping. The resulting vibration causes poor ride quality for passengers, fatigues structural elements, and increases maintenance requirements for the helicopter. Fluidic Flexible Matrix Composite (F²MC) tubes are an emerging technology which can provide lightweight, compact vibration control when attached to a vibrating structure and coupled with a fluidic circuit. This paper presents experimental results to validate a method for combining a finite element structural model of a laboratory-scale tailboom with a model of the F²MC tubes and fluidic circuit dynamics. Reductions of over 70% in both bending and torsional vibration are demonstrated in a coupled 26.7 Hz lateral bending/torsion tailboom mode, indicating that F²MC vibration control is viable at higher frequencies and for more complex vibration modes than previous research had explored. A second group of experiments is performed to demonstrate the effectiveness of a novel fluidic circuit configuration which targets two tailboom vibration modes, in contrast to the previous F²MC treatment which can target only one mode. On the lab-scale tailboom testbed, vibration reductions of over 60% are demonstrated in two modes simultaneously when targeting both a 12.2 Hz vertical mode and a 26.7 Hz lateral bending/torsion mode. The circuit designed to reduce vibrations in two modes has a nearly identical weight to a comparable single-mode treatment but is much more effective in reducing vibrations at the second mode.

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Hong, Seong, Do-Hyung Kim, Dong Kim e Sung Jung. "Multicyclic Control for Vibration Reduction of Lift-Offset Coaxial Rotorcraft". In Vertical Flight Society 80th Annual Forum & Technology Display, 1–16. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1284.

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This study explores the best vibration reduction using a multicyclic controller through an individual blade control (IBC) actuation scheme for a lift-offset coaxial helicopter in high-speed flight. The rotorcraft dynamics model consists of coaxial, three-bladed counter-rotating rotors and a finite element fuselage stick model constructed based on the measured data of the XH-59A helicopter. The two-way coupled rotor-body vibration analysis results exhibit excellent correlations with the test data for rotor hub loads and airframe vibrations. The best actuation scenarios are sought for the minimum vibration of the vehicle using either open- or closed-loop control scheme. It is shown that the IBC actuation effectively reduces the vibrations at both locations of the rotorcraft. The co-reduction of 3P (per rotor revolution) and 6P vibration of the rotorcraft is achieved using the multicyclic control with offline system identification. A multicyclic harmonic IBC actuation enables to suppress the rotorcraft vibration by 81.4% and 3P pilot seat vibration by 92%, respectively, as compared to the uncontrolled case, leading to a significantly reduced vibration level (below 0.05g) of the rotorcraft. The closed-loop multicyclic control using the identified system and the aircraft model shows a good correlation ensuring the suitability of the present optimal control simulations.

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Rivin, Eugene I. "Vibration Analysis vs. Vibration Control". In SAE 2005 Noise and Vibration Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2005. http://dx.doi.org/10.4271/2005-01-2548.

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Patrascu, Monica, e Ioan Dumitrache. "Hybrid geno-fuzzy controller for seismic vibration control". In 2012 UKACC International Conference on Control (CONTROL). IEEE, 2012. http://dx.doi.org/10.1109/control.2012.6334605.

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Diala, Uchenna, Rajintha Gunawardena, Yunpeng Zhu e Zi-Qiang Lang. "Nonlinear Design and Optimisation of a Vibration Energy Harvester". In 2018 UKACC 12th International Conference on Control (CONTROL). IEEE, 2018. http://dx.doi.org/10.1109/control.2018.8516821.

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Nakade, Keisuke, e Shinji Wakui. "Pitching vibration suppression of the galvano mirror considering coupling rigidity". In 2016 UKACC 11th International Conference on Control (CONTROL). IEEE, 2016. http://dx.doi.org/10.1109/control.2016.7737595.

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Balandin, Dmitry V., e Mark M. Kogan. "Multi-Objective Generalized H2 Control for Optimal Protection from Vibration". In 2018 UKACC 12th International Conference on Control (CONTROL). IEEE, 2018. http://dx.doi.org/10.1109/control.2018.8516721.

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Abdolvand, Mehdi, e Mohamad Hosain Fatehi. "Model-base predictive control for vibration suppression of a flexible manipulator". In 2012 UKACC International Conference on Control (CONTROL). IEEE, 2012. http://dx.doi.org/10.1109/control.2012.6334691.

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Babakhani, Bayan, Theo J. A. de Vries e Job van Amerongen. "Off-axis modal active vibration control of rotational vibrations". In 2012 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2012. http://dx.doi.org/10.1109/aim.2012.6266029.

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Hugin, Claus, e Colin Hatch. "Global Control of Helicopter Vibrations Using a Semi-Active Vibration Control System". In 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
14th AIAA/ASME/AHS Adaptive Structures Conference
7th. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-1860.

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Rapporti di organizzazioni sul tema "Vibration control"

Martin E. Cobern. Downhole Vibration Monitoring & Control System. Office of Scientific and Technical Information (OSTI), marzo 2007. http://dx.doi.org/10.2172/903219.

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Martin E. Cobern. Downhole Vibration Monitoring & Control System. Office of Scientific and Technical Information (OSTI), giugno 2006. http://dx.doi.org/10.2172/890746.

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Martin E. Cobern. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM. Office of Scientific and Technical Information (OSTI), settembre 2006. http://dx.doi.org/10.2172/894899.

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Martin E. Cobern. Downhole Vibration Monitoring & Control System. Office of Scientific and Technical Information (OSTI), dicembre 2006. http://dx.doi.org/10.2172/897545.

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Farrar, C., W. Baker, J. Fales e D. Shevitz. Active vibration control of civil structures. Office of Scientific and Technical Information (OSTI), novembre 1996. http://dx.doi.org/10.2172/400183.

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Martin E. Cobern. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM. Office of Scientific and Technical Information (OSTI), maggio 2006. http://dx.doi.org/10.2172/883086.

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Martin E. Cobern. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM. Office of Scientific and Technical Information (OSTI), ottobre 2004. http://dx.doi.org/10.2172/834331.

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Martin E. Cobern. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM. Office of Scientific and Technical Information (OSTI), agosto 2004. http://dx.doi.org/10.2172/835135.

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Martin E. Cobern. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM. Office of Scientific and Technical Information (OSTI), ottobre 2004. http://dx.doi.org/10.2172/835528.

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Martin E. Cobern. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM. Office of Scientific and Technical Information (OSTI), gennaio 2005. http://dx.doi.org/10.2172/837016.

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