Modeling and Feedback Control for Vibratory Feeder of Electromagnetic Type
Tomoharu Doi*, Koji Yoshida**, Yutaka Tamai***, Katsuaki Kono***, Kazufumi Naito*** and Toshiro Ono****
*Osaka Prefectural College of Technology, 26-12 Saiwai-cho, Neyagawa, Osaka 572-8572, Japan
**Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan
***Ishida Co., Ltd. 959-1 Shimomagari, Ritto-cho, Kurita-gun, Shiga 520-3026, Japan
****Osaka Prefectural University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531 Japan
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.
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