The control of the resonant mode of a vibrating machine that is driven by an asynchronous electro motor

Panovko, Grigory; Shokhin, Alexander; Eremeikin, S. A.

doi:10.3103/s1052618815020120

Cited by 8 publications

(8 citation statements)

References 1 publication

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“…The previously proposed in [15] control algorithm for automatic tuning and resonant mode maintaining takes into account possible changes in the mass of the system, which leads to a change in the resonant frequency. Phase shift ε between vertical oscillations of the platform and vertical component of disturbing force, determined in steady state, is taken as the main controlled parameter that determines the oscillation mode of the whole system.…”

Section: Control Systemmentioning

confidence: 99%

“…To determine the change in power supply frequency, required to adjust the system to resonant mode, dynamic portrait conception has been developed [15]. Dynamic portrait is relationship between three system parameters: phase shift, power supply frequency, and natural frequency of the system (or mass, if we consider it as a changing parameter of the system).…”

Section: Control Systemmentioning

confidence: 99%

“…This problem is associated with the slip effect which essentially depends on oscillations of machine working body [10,[12][13][14]. In [15,16] the authors of this article proposed methods and algorithms for controlling resonant oscillations of single-mass vibrating machines with unbalanced exciter driven by AC motor. However, these works tended to consider excitation schemes with a single exciter.…”

Section: Introductionmentioning

confidence: 99%

“…Note that self-synchronization occurs only under certain conditions which depend on parameters of oscillating system and parameters of oscillations (magnitude, frequency and mode shape). It is particularly difficult to maintain self-synchronization near resonance if system parameters and operation load change [15]. exciters in the resonance zone on the example of a single-mass system.…”

Section: Introductionmentioning

confidence: 99%

“…In order to automatically adjust and maintain the resonance mode of oscillations, a frequency control system for the supply voltage has been developed and implemented [15,16,18]. An appropriate prototype in the form of resiliently supported platform with two motor-vibrators has been designed for experimental verification (see Fig.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Features of dynamics of mechanical system with self-synchronizing vibroexciters near resonance

Eremeykin¹,

Panovko²,

Shokhin³

2017

J. vibroeng.

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The paper describes some features of behavior of a mechanical system with self-synchronizing vibroexciters. The influence of friction torque in the bearings of vibroexciters rotors on their self-synchronization has been established by means of experimental research and mathematical simulation. Both the causes and frequency ranges of gaps in frequency responses has been found out. Further modification of the previously proposed algorithm for resonant tuning has expanded working regimes limits of the control system and improved resonant tuning stability.

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Section: Control Systemmentioning

confidence: 99%

Section: Control Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Features of dynamics of mechanical system with self-synchronizing vibroexciters near resonance

Eremeykin¹,

Panovko²,

Shokhin³

2017

J. vibroeng.

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Analysis of oscillations of a mechanical system with inertial exciters at an alternating position of it’s mass center

2018

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Numerical simulation results of dynamics of a mechanical system with self-synchronizing unbalance exciters with displaced center of mass relative to the initial centered state are described in application to analysis of dynamics of vibrating machines with variable position of operation load. Features of self-synchronization of exciters are revealed depending on position of the center of mass. Influence of position of the center of mass on resonance frequencies and modes is presented.

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Correction of the static characteristic of a frequency converter to reduce the amplitudes of resonance vibrations of the vibrating table

Vedernikov

Сергеевич²,

Dunaev³

et al. 2021

Vestnik of Samara State Technical University. Technical Science

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It is known that vibration systems of directional vibrations based on asynchronous vibration motors are currently widely used in practice, but at the same time they have a significant drawback - a sharp increase in vibration amplitudes when passing through the resonance zone at the time of acceleration and deceleration of vibration motors, which negatively affects their operation. The article discusses a vibration table with two unbalanced asynchronous vibration motors. The calculation scheme and equations of motion of such a vibration system are presented. It is shown that the vibration table as a control object is an oscillatory link with a pronounced resonant frequency. The equations of motion of asynchronous vibration motors with scalar frequency control are given. A structural diagram of a vibration table with unbalanced exciters has been developed, the modeling of which made it possible to determine the amplitudes of resonant oscillations. It is proposed to apply correction of the static characteristics of the frequency converter, which connects the effective value of the output voltage with the frequency, to reduce the resonance amplitudes. Equations of the desired static characteristics of the inverter and analytical dependences for calculating the necessary coefficients for its implementation are given. A computational model has been developed that makes it possible to take into account the effect of the corrected static characteristic of the frequency converter on the operation of the vibrating table at the stages of acceleration and deceleration. The results of computer simulation are given, convincingly showing that the correction of the static characteristics of the inverter is an effective means of reducing the amplitudes of resonant oscillations. It is shown that modern frequency converters have functionality that makes it easy to correct the dependence of the effective value of the output voltage on the frequency. The need to adjust the static characteristics of the inverter for a specific type of product tested on the vibration table is noted.

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The control of the resonant mode of a vibrating machine that is driven by an asynchronous electro motor

Cited by 8 publications

References 1 publication

Features of dynamics of mechanical system with self-synchronizing vibroexciters near resonance

Features of dynamics of mechanical system with self-synchronizing vibroexciters near resonance

Analysis of oscillations of a mechanical system with inertial exciters at an alternating position of it’s mass center

Correction of the static characteristic of a frequency converter to reduce the amplitudes of resonance vibrations of the vibrating table

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