Modeling and Control of Bulk Material Flow on the Electromagnetic Vibratory Feeder

Mišljen, Petar; ́c, Milan Matijevi; ́c, Željko Despotovi

doi:10.7305/automatika.2017.03.1766

Cited by 5 publications

(5 citation statements)

References 1 publication

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“…The material flow rate is calculated based on the speed of the material through the trough and the known dimensions of the trough. The relative movement of the bulk material in relation to the vibrating trough and modeling of the height level of the bulk material in a vibrating trough have been decrypted in the literature [12]. The transmission characteristics are shown in Fig.4 Comparing Fig.2 to Fig.3, and considering Fig.4, it can be concluded that the adopted model of the EVF can be deemed a valid one.…”

Section: Mathematical Model Of Vibratory Feeder Loaded With Materials mentioning

confidence: 99%

“…Mathematical EVF model A detailed description of a nonlinear model of an EVF is shown in the cited literature [12] and this model has been used in this paper. The experimental setup, which is shown in Fig.1, includes the following instruments: (1) a multimeter;…”

Section: Mathematical Model Of Vibratory Feeder Loaded With Materials mentioning

confidence: 99%

“…The transmission characteristics are shown in Fig.4 Comparing Fig.2 to Fig.3, and considering Fig.4, it can be concluded that the adopted model of the EVF can be deemed a valid one. The ratio of parameter A[%] and the amplitude of oscillations P[mm] are explained in detail in the literature [12].…”

Section: Mathematical Model Of Vibratory Feeder Loaded With Materials mentioning

confidence: 99%

See 2 more Smart Citations

System approach to bulk material flow control on an electromagnetic vibratory feeder

Mišljen¹,

Despotović²,

Matijević³

2019

Sci Tech Rev

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This paper studies the closed-loop control of an electromagnetic vibratory feeder (EVF). Two different linear design procedures have been employed: a conventional proportional-integral-derivative (PID) controller, and a model predictive control (MPC) controller. All derived results have been validated by computer simulation of a nonlinear mathematical model of the system. The results have proved that both controllers achieve a good tracking of the desired output in a selected operating point. In comparison to the PID controller, the MPC controller is more sensitive to disturbances in the form of changes in the mass of material being transported

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Section: Mathematical Model Of Vibratory Feeder Loaded With Materials mentioning

confidence: 99%

Section: Mathematical Model Of Vibratory Feeder Loaded With Materials mentioning

confidence: 99%

Section: Mathematical Model Of Vibratory Feeder Loaded With Materials mentioning

confidence: 99%

See 1 more Smart Citation

System approach to bulk material flow control on an electromagnetic vibratory feeder

Mišljen¹,

Despotović²,

Matijević³

2019

Sci Tech Rev

Self Cite

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“…Uniform flow along the tray is obtained by imposing uniform vibration of the tray, despite its flexibility. Vibratory feeders are usually driven by electromagnetic actuators [1,30,31], linear actuators [32,33], and rotating motor with eccentric masses [34], although some new promising techniques are being investigated in the literature, such as actuators based on dielectric elastomers [35]. Regardless of the technology adopted for actuation, it is here assumed that the force amplitude of each actuator can be set to the desired one.…”

Section: Model Of the Systemmentioning

confidence: 99%

Response optimization of underactuated vibration generators through dynamic structural modification and shaping of the excitation forces

Belotti

Richiedei

Tamellin

et al. 2020

Int J Adv Manuf Technol

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Resonant vibration generators, such as vibratory feeders or ultrasonic sonotrodes, are often employed in manufacturing to generate harmonic vibrations with suitable amplitude, spatial shape, and frequency, in order to meet the process requirements. These underactuated systems are usually excited in open loop by few actuators, and therefore, it is not ensured that the desired response is correctly achieved, since the feasible motions should belong to the subset of the allowable motions. To achieve the closest approximation of the desired vibrations, some new solutions are here proposed. The first strategy is the optimal shaping of the harmonic forces exerted by the actuators, by solving an inverse dynamic problem through a coordinate transformation and the projection of the desired response onto the subspace of the allowable motion. By exploiting the formulation of such a subspace, a second approach that involves concurrently both the force shaping and the modification of the inertial and elastic system parameters is proposed. The idea of this approach is to exploit the modification of the elastic and inertial parameters to properly shape the allowable subspace in such a way that it spans the desired response. A solution method is developed, and analytical sensitivity analysis is proposed to choose the design variables. Validation is proposed through a linear vibratory feeder with a long flexible tray, taken from the literature. The results show the effectiveness of the proposed strategies that lead to a very precise approximation of the desired response.

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“…The performance of the TLCBD was much better for the frequency ratios near 1, which may be called the resonance region. At resonance region, when the excitation frequency is equal to natural frequency of structure the response of structure becomes maximum [35]. The performance of the TLCBD also depends on the mass ratio.…”

Section: Analytical Modelmentioning

confidence: 99%

Application of tuned liquid column ball damper (TLCBD) for improved vibration control performance of multi-storey structure

et al. 2019

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Tuned liquid column ball damper (TLCBD) is a passive control device used for controlling the building vibrations induced from wind or earthquakes. TLCBD is a modified form of conventional tuned liquid column damper (TLCD). This paper studies the effect of TLCBD on the four-storey steel frame structure. The performance of the TLCBD is also compared with conventional TLCD. The analytical model of both TLCD and TLCBD is presented here. The effectiveness of these analytical models is examined experimentally by series of shaking table tests under different excitation levels including harmonic loadings and seismic excitations. In TLCBD, the vibration is reduced significantly as compared to TLCD by using steel ball as a moving orifice. The difference in diameter of steel ball and tube, containing the liquid column, acts as an orifice which moves with the movement of the ball. This moving orifice phenomenon enhanced the vibration reduction effect by resisting the water motion in the TLCBD. Root mean square (RMS) and peak values of acceleration were calculated for each loading and each storey of uncontrolled and controlled structures. Comparison of the time histories of controlled and uncontrolled structures for different loadings is also reported. Results indicate that the TLCBD is more effective in the earthquake scenarios as compared to the harmonic excitations. The TLCBD controls the vibration of the primary structure significantly in vibration reduction.

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Modeling and Control of Bulk Material Flow on the Electromagnetic Vibratory Feeder

Cited by 5 publications

References 1 publication

System approach to bulk material flow control on an electromagnetic vibratory feeder

System approach to bulk material flow control on an electromagnetic vibratory feeder

Response optimization of underactuated vibration generators through dynamic structural modification and shaping of the excitation forces

Application of tuned liquid column ball damper (TLCBD) for improved vibration control performance of multi-storey structure

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