Damping

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In physics, damping is any effect that tends to reduce the amplitude of oscillations in an oscillatory system, particularly the harmonic oscillator. (Wikipedia.org)






Conferences related to Damping

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2021 IEEE Photovoltaic Specialists Conference (PVSC)

Photovoltaic materials, devices, systems and related science and technology


2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

Energy conversion and conditioning technologies, power electronics, adjustable speed drives and their applications, power electronics for smarter grid, energy efficiency,technologies for sustainable energy systems, converters and power supplies


2020 59th IEEE Conference on Decision and Control (CDC)

The CDC is the premier conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, automatic control, and related areas.


2020 IEEE 70th Electronic Components and Technology Conference (ECTC)

ECTC is the premier international conference sponsored by the IEEE Components, Packaging and Manufacturing Society. ECTC paper comprise a wide spectrum of topics, including 3D packaging, electronic components, materials, assembly, interconnections, device and system packaging, optoelectronics, reliability, and simulation.


2020 IEEE International Conference on Industrial Technology (ICIT)

ICIT focuses on industrial and manufacturing applications of electronics, controls, communications, instrumentation, and computational intelligence.


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Periodicals related to Damping

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Automatic Control, IEEE Transactions on

The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...


Control Systems Technology, IEEE Transactions on

Serves as a compendium for papers on the technological advances in control engineering and as an archival publication which will bridge the gap between theory and practice. Papers will highlight the latest knowledge, exploratory developments, and practical applications in all aspects of the technology needed to implement control systems from analysis and design through simulation and hardware.


Electromagnetic Compatibility, IEEE Transactions on

EMC standards; measurement technology; undesired sources; cable/grounding; filters/shielding; equipment EMC; systems EMC; antennas and propagation; spectrum utilization; electromagnetic pulses; lightning; radiation hazards; and Walsh functions


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Most published Xplore authors for Damping

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Xplore Articles related to Damping

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An active damping scheme of the voltage-source converter driving the induction machine damping unit for mitigating subsynchronous oscillation in power systems

11th IET International Conference on AC and DC Power Transmission, 2015

An induction machine damping unit (IMDU), installing on the main shaft of the turbine-generator unit, is capable of damping subsynchronous oscillation (SSO) of the shaft. The electrical damping of IMDU in the subsynchronous frequency range is the key index of measuring its damping effectiveness. As the electrical damping can be increased by raising its rated frequency, the IMDU should be ...


Analysis of proportional damping or Rayleigh damping on damped and undamped systems

2017 Fifth International Conference on Aerospace Science & Engineering (ICASE), 2017

Damping mechanisms have been active areas of research for a long time in history, despite this its understanding is still rudimentary as compared to the other traits of modeling. The actual problem is that even now it is not clear, which state variables are relevant for the computation of damping forces, which makes it very difficult to model in Finite ...


Comparative analysis of earthquake response spectra about viscous and complex damping model

2011 International Conference on Multimedia Technology, 2011

Towards complex and viscous damping model of the SDOF system, this article researches the differences, similarities of the above two system responses. Through calculating the two kinds of system dynamic equations based on harmonic excitation clearly, the result is that: When the excitation's period is less than the natural period of structures, the displacement response of the complex damping system ...


Damping Control Study on Concrete Frame Structure with Viscous Damping Walls

2013 Fourth International Conference on Digital Manufacturing & Automation, 2013

With the progress of science and technology, seismic design method cannot meet the need of safety of architectural structure, therefore this new vibration controlling technology to be researched and developed. Viscous damping wall is a new concept of vibration damping technology, it has a damping force, flexible layout, good damping effect, etc. This paper analyzes the viscous damping walls in ...


Damping Factor Based Delay Margin for Wide Area Signals in Power System Damping Control

IEEE Transactions on Power Systems, 2013

This letter presents a novel method to calculate damping factor based delay margin which constructs correlation between signal transmission delay and interarea oscillation damping performance by translation operation in complex plane. It can be used to guide wide area damping controller design under the condition of given damping factor and required signal transmission delay.


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Educational Resources on Damping

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IEEE-USA E-Books

  • An active damping scheme of the voltage-source converter driving the induction machine damping unit for mitigating subsynchronous oscillation in power systems

    An induction machine damping unit (IMDU), installing on the main shaft of the turbine-generator unit, is capable of damping subsynchronous oscillation (SSO) of the shaft. The electrical damping of IMDU in the subsynchronous frequency range is the key index of measuring its damping effectiveness. As the electrical damping can be increased by raising its rated frequency, the IMDU should be driven by a voltage-source converter (VSC). In this paper, an active damping scheme, namely, adding a feedback path from the speed of IMDU to the output voltage waveform of the VSC driving it, is proposed. The relationship of the electrical damping of IMDU and the d<sub>q</sub> components, V<sub>d</sub> and V<sub>q</sub>, of its terminal voltage, is analysed and it is demonstrated that by introducing a proportion regulator in the d-axis and an integrator in the q-axis, the electrical damping of IMDU in the subsynchronous frequency range can be increased further. It is verified through eigenvalue analysis and time-domain simulation that with the active damping scheme applied, the required capacity of IMDU can be reduced and the SSO will decay in a faster rate.

  • Analysis of proportional damping or Rayleigh damping on damped and undamped systems

    Damping mechanisms have been active areas of research for a long time in history, despite this its understanding is still rudimentary as compared to the other traits of modeling. The actual problem is that even now it is not clear, which state variables are relevant for the computation of damping forces, which makes it very difficult to model in Finite Element Method. To remedy this, a well-known method is used, called `Proportional damping' (Rayleigh damping) and used for the modeling of viscous damping, initially established for undamped systems, but can be used for the analysis of damped systems as well. Proportional damping is used to model the energy dissipation characteristics of complex engineering structures as well as solve multiple dynamic problems. It plays very important role in modeling damping on an industrial scale. So, Rayleigh damping is proved to be an effective way of considering damping for structure's analysis. To completely analyze the proportional damping, damping parameters are attained for two multiple degrees of freedom systems and Rayleigh damping parameters will be extracted for attained damping values during the research to demonstrate the theoretical approach of Proportional damping. The aim of this paper is to analyze Rayleigh damping or Proportional damping and have an overview of its effects and its importance in structures, along with explaining its advantages and disadvantages.

  • Comparative analysis of earthquake response spectra about viscous and complex damping model

    Towards complex and viscous damping model of the SDOF system, this article researches the differences, similarities of the above two system responses. Through calculating the two kinds of system dynamic equations based on harmonic excitation clearly, the result is that: When the excitation's period is less than the natural period of structures, the displacement response of the complex damping system is stronger than the latter. Oppositely, the speed response, the acceleration response are both weaker than the latter. On the contrary, the result is opposite. Based on those work, the acceleration spectra of some representative earthquake records are provided of the two kinds of systems, and also the velocity and displacement spectra. In comparison with the last two spectra in the condition of harmonic excitation, the results show the similar phenomenon. But the acceleration spectra of the viscous damping model are higher than that of the complex damping model at any time. And with the growing damping ratio, the difference is more remarkable. Under certain earthquake records, the structure displacement response values of certain natural period may differ by 15%.The velocity spectra differ by 14%. The acceleration spectra differ by 8%. In the end, the article gives us a suggestion that how to choose damping model to make the structure more Safe and reliable. And also, it provides some help for the further study of complex damping theory, references for engineering application.

  • Damping Control Study on Concrete Frame Structure with Viscous Damping Walls

    With the progress of science and technology, seismic design method cannot meet the need of safety of architectural structure, therefore this new vibration controlling technology to be researched and developed. Viscous damping wall is a new concept of vibration damping technology, it has a damping force, flexible layout, good damping effect, etc. This paper analyzes the viscous damping walls in high-rise concrete frame structure damping using SAP2000 software, and plans the number and arrangement of the viscous damping walls in high-rise concrete frame structure reasonably, providing a scientific basis for the theoretical analysis and engineering application of the framework structure of the viscous damping walls.

  • Damping Factor Based Delay Margin for Wide Area Signals in Power System Damping Control

    This letter presents a novel method to calculate damping factor based delay margin which constructs correlation between signal transmission delay and interarea oscillation damping performance by translation operation in complex plane. It can be used to guide wide area damping controller design under the condition of given damping factor and required signal transmission delay.

  • Analysis of characteristics of damping compensated by subsynchronous damping control in HVDC system

    Subsynchronous Damping Control (SSDC) compensation damping plays a significant role in power system stability in HVDC system. This paper builds a linear model to analysis SSDC compensation damping characteristics based on an EPRI proposed double-ended DC test system. Calculation results show that electrical damping is obviously relevant to some factors, such as generator capacity, DC system transmission capacity and DC/AC system connection strength. The ratios of the electrical damping to the Unit Interaction Factor (UIF) and other two specific constants, which are part of UIF, don't change significantly. The two constants can be used to indicate characteristics of the electrical damping and represent the `shaft to converter station' electrical damping transfer characteristic. In this paper, the two constants are called Backward Unit Interaction Factor and Forward Unit Interaction Factor. Therefore, electrical damping characteristics can be represented by UIF and the newly proposed two constants.

  • Hybrid Active Damping Control Method for Grid Connected LCL Inverters Under Weak Grid

    This LCL filters are widely used in grid connected inverters. When the transmission (grid) impedance is not considered, active damping is usually achieved by increasing the capacitance current inner loop. However, when the line impedance is considered, the active damping coefficient of the capacitor current inner loop becomes larger with the increase of the grid impedance. The excessive damping coefficient leads to a sharp decline in the phase margin of the open loop transfer function of the system, which affects the stability of the system. In this paper, another active damping is realized by increasing the inner loop feedback of the grid current on the basis of the inner loop of the capacitive current. The active damping coefficient of the grid current inner loop becomes smaller with the increase of the transmission impedance. Combining the two active damping methods and the grid voltage feed-forward, the equivalent damping coefficient of the system is little influenced by the transmission impedance of, thus it can adapt to the larger transmission impedance range. The simulation results show that the proposed hybrid active damping voltage feed-forward control strategy is correct.

  • Analysis calculation of speed characteristic of hydro-pneumatic spring based on damping valve parameter

    The diagrams of damping valve with annular slice and hydro-pneumatic spring are given. According to the calculation method of the sectional linear speed characteristic, the damping coefficients and the resistance values at the valve open point and the maximal valve open point are deduced. Based on the principles of sheet deformation and aperture throttle, the function relation between flow and pressure difference in turbulent state is researched before and after the damping valve is open. After that, the system elastic force value is deduced by using equation of state of real gas. The correctness of the design method is validated by means of the comparison between performance test and simulation data. Eventually, the influence rules of different parameters of damping valve on the speed characteristic of hydro-pneumatic spring are analyzed so as to provide reference to the research on the internal characteristic of damping equipment.

  • Estimation of Damping Matrices of Cable-Stayed Bridges Based on Known Data of Modal Damping

    The composition of damping in cable-stayed bridges is complicated. It is difficult to determine the damping matrices precisely. A method to calculate the estimation of damping matrices of cable-stayed bridges by known damping ratios is proposed in this paper. Based on the assumption that the damping coefficients of substructures (i.e. Girder, tower, cable, support etc.) in cable-stayed bridges don't change with frequency or amplitude of vibration, the complex eigenvector and natural frequency of cable-stayed bridges are derived by non-proportional damping state-space method. The results have high precision, which fulfill the requirement of dynamic calculation of structures. The damping matrices have more information than modal damping ratios, which has wide application in reality.

  • An improved active damping method with grid-side current feedback to maximize damping ratio for LCL-type grid-connected inverter

    LCL-type grid-connected inverter is largely utilized in renewable generation system due to high harmonic suppression. In order to tackle the resonance issue induced by LCL-type filters, grid-side current feedback active damping method (GCFADM) without extra sensors has been extensively investigated. However, the damping characteristic under GCFADM has not been fully evaluated. In this paper, an improved GCFADM based on proportional derivative algorithm is proposed to maximize damping ratio which can enlarge the existence steady region. By utilizing root locus analysis method, the maximal damping ratio (MDR) is obtained in classification of the control delay time and the ratio of resonance frequency to sampling frequency respectively. Based on MDR, stability regions of the proposed method are identified. By comparing with different stability regions, the optimized proportional derivative GCFADM can be obtained intuitively as well as the corresponding control parameters. To verify the analyses, simulation and experiment platform are both set up. Simulation and experimental results show that the proposed method can not only achieve the best damping performance, but also manifest strong robust against main circuit variations.



Standards related to Damping

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IEEE Guide for Gas-Insulated Substations

This guide provides information of special relevance to the planning, design, testing, installation, operation and maintenance of gas-insulated substations(GIS) and equipment. This guide is intended to supplement IEEE Std C37-122- 1993(R2002). In general, this guide is applicable to all GIS above 52 kV. However the importance of the topics covered varies with application category. For example, issues related to advanced ...


IEEE Guide for Laboratory Measurement of the Power Dissipation Characteristics of Aeolian Vibration Dampers for Single Conductors

Abstract: The current methodologies, including apparatus, procedures, and measurement accuracies, for determining the dynamic characteristics of vibration dampers and damping systems are described. Some basic guidance is provided regarding a given method's strengths and weaknesses. The methodologies and procedures described are applicable to indoor testing only.


IEEE Guide on Conductor Self-Damping Measurements