Experimental analysis of the oscillations of a mechanical system with self-synchronized inertial vibration exciters

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

doi:10.3103/s1052618815060114

Cited by 8 publications

(10 citation statements)

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“…The works [7,8,15,16] are devoted to analysis of the conditions for the self-synchronization of exciters and the choice of design parameters and operating modes of oscillation excitation for some practical designs of vibrating machines. Some experimental results on the study of self-synchronization in single-mass and two-mass dynamic schemes of vibrating machines are presented in [2,18], confirming the main theoretical results obtained in [2]. It is shown that the type of synchronization changes when the system passes through the resonance frequencies.…”

Section: Introductionsupporting

confidence: 71%

“…At the same time, for resonant machines with automatically controlled oscillation modes, it is of considerable interest to analyze synchronous motion regimes in resonant regions. In these regions, the system with an asynchronous electric drive most shows the features of nonlinear behavior to the utmost, which is caused by occurrence of relatively large oscillation amplitudes [2,7,8,16,[18][19][20]. Some control systems for automatic adjustment and maintenance of resonant oscillations, which operating principle is based on measuring the phase relations between the exciting force and the oscillations, are considered in [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Self-synchronization features of inertial vibration exciters in two-mass system

Panovko¹,

Shokhin²

2019

J. vibroeng.

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The paper presents the results of experimental analysis features of rotation of two unbalance vibration exciters that excite oscillations of a chain-type two-mass oscillatory system in order to identify stability of synchronous modes of the debalances rotation near the system resonances (in application to analysis of resonant vibrating machines dynamics). Experimentally obtained amplitude-frequency characteristics of the model, velocities and mutual phase shift of rotation of the debalances are analyzed. Areas of stable synchronous rotation of the debalances and types of their self-synchronization are revealed as dependence of both the frequency of voltage supplying to the electric motors and the imbalances value. It is shown that when approaching the resonant frequencies, both the debalances rotational speeds and their mutual phasing appear to be unstable.

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Section: Introductionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Self-synchronization features of inertial vibration exciters in two-mass system

Panovko¹,

Shokhin²

2019

J. vibroeng.

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“…Detailed analysis of the experimental and theoretical frequency response obtained in [19,20] showed that oscillations at above-resonant frequencies of vertical oscillations are represented by unstable chaotic motions. This instability can be seen in frequency response characteristic as a jump (see Fig.…”

Section: Analysis Of Dynamics Featuresmentioning

confidence: 99%

“…All angular coordinates mentioned here are measured from the axis counterclockwise. Differential equations of motion for the system have been derived using Lagrange equations of the second kind [19]:…”

Section: Introductionmentioning

confidence: 99%

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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“…[6][7][8][9][10] The relationship between the excitation frequency and the natural frequency in the vibrating system driven by the multi-excited motors has been investigated and can be found in many references. [11][12][13][14] In addition, in order to ensure the synchronous operation of the multi-excited motors and the synchronous stability of the vibrating system, most of the traditional vibration machines can be run on the far-super resonance state, 11 but it is of very limited to obtain the stable operation and the large vibration.With the development of vibration theory, the frequency range of the vibrating system driven by the multi-excited motors, such as a superresonant vibrating system, 12 a non-resonant vibrating system 13,14 and the combination of the resonance and nonresonance vibrating system, [15][16][17] has been greatly expanded. Obviously, the occurrence of vibration synchronization in the vibrating system driven by the multi-excited motors can also be impacted by the relationship between the excitation frequency and the natural frequency.…”

Section: Introductionmentioning

confidence: 99%

Analysis of harmonic vibration synchronization for a nonlinear vibrating system with hysteresis force

Zhang

2019

Journal of Low Frequency Noise, Vibration and Active Control

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Harmonic vibration synchronization of the two excited motors is an important factor affecting the performance of the nonlinear vibration system driven by the two excited motors. From the point of view of the hysteresis force, the nonlinear dynamic models of the nonlinear vibration system driven by the two excited motors are presented for the analysis of the hysteresis force with the asymmetry. An approximate periodic solution for the nonlinear vibration system with the hysteresis force is investigated using the nonlinear models. The condition of harmonic vibration synchronization is theoretically analyzed using the rotor-rotation equations of the two excited motors in the nonlinear dynamic models and the stability condition of harmonic vibration synchronization also is theoretically analyzed using Jacobi matrix of the phase difference equation of two excited motors. Using Matlab/Simlink, harmonic vibration synchronization of the two excited motors and the stability of harmonic vibration synchronization for the nonlinear vibration system with the hysteresis force are analyzed through the selected parameters. Various synchronous processes of the nonlinear vibration system with the hysteresis force are obtained through the difference rates of the two excited motors (including the initial phase difference, the initial rotational speed difference, the difference of the motors parameters). It has been shown that the research results can provide theoretical basis for the design and research of the vibration system driven by the two-excited motors.

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Experimental analysis of the oscillations of a mechanical system with self-synchronized inertial vibration exciters

Cited by 8 publications

References 0 publications

Self-synchronization features of inertial vibration exciters in two-mass system

Self-synchronization features of inertial vibration exciters in two-mass system

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

Analysis of harmonic vibration synchronization for a nonlinear vibrating system with hysteresis force

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