Modeling and Feedback Control for Vibratory Feeder of Electromagnetic Type

Abstract

Modeling and Feedback Control for Electromagnetic Vibratory Feeder The electromagnetic vibratory feeder is a typical transport device used on production lines. Existing feeders are driven by feed-forward control, firing angle control of the driver cannot cancel sudden disturbances. We applied feedback control to such a feeder, proposing 2 detailed models – a dynamic model for a vibratory mechanical element useful to mechanical design and another for an electromagnetic actuating element. Taylor's expansion of these 2 models yields a linear dynamic model useful in feedback control theory. The feasibility of the model was confirmed through simulation. In a preliminary experiment, we applied PI control to the feeder because the driver is nonlinear, and results confirmed that PI control improves transport of the feeder.

Vibration control of resonant vibratory feeders with electromagnetic excitation

“…Detailed dynamic model of EMVF is presented in [6][7], [16] and [16][17]. In general vector form, this model can be represented as: In practical applications the largest contribution to moving the LCE has a dominant oscillatory mode, coming from high quality composite springs and related to the displacement p [17]: …”

“…In this way, the whole system power converter-power controller-vibratory actuator-vibratory feeder i.e. regulated vibratory conveying drive, has behavior of the controllable mechanical oscillator [6][7][8][9].…”

“…Since the supply network frequency is constant (50Hz/60Hz), the adjusting of phase angle can only accomplished control of the amplitude oscillations, but not and their frequency [6][7], [9]. Application of switch mode IGBT power converters enables accomplishing the amplitude and/or frequency control of EMVF [11][12][13].…”

Power Current Control of a Resonant Vibratory Conveyor Having Electromagnetic Drive

“…Their application implies adjustment of vibratory width (double amplitude of the oscillations) of the LCE by means of phase control, i.e. regulation of the phase angle * α [7]- [10]. Basic topologies of the standard power converters, together with the corresponding waveforms of the EVA current and voltage, are shown in Figs.…”

Hardware and Software Implementations of Measuring System for Resonant Electromagnetic Vibratory Conveyor

“…The standard power output stages of REVC using SCR devices (thyristors and triacs) [4], [9][10][11][12]. This implies using the phase angle control (PAC) and constant frequency of vibration.…”