TY - JOUR
T1 - Vibration suppression of electromagnetic-force-restoration weighing cell using wave control
AU - Kurumatani, Hiroki
AU - Inoue, Yuuki
AU - Nishimura, Satoshi
AU - Isaka, Masahiko
AU - Shimane, Ryo
AU - Tanaka, Takuya
AU - Katsura, Seiichiro
N1 - Funding Information:
The paper applied reflected-wave rejection for the EMFR weighing cell to achieve the high-speed weighing. When transporting the EMFR weighing cell, it picks up the inertial force. Simultaneously, it works to make the lever position restored and then the kinetic energy circulates between restoring force and inertial force. Then, the vibration of the internal structure is induced. Because the EMFR weighing cell behaves like the linear system, reflected-wave rejection can be applied. The paper introduced the wave model and derive the model which fit to the actual system. To implement reflected-wave rejection, no additional sensor for load-side detection was equipped but only the output of the weighing cell was used. Due to introduction of reflected-wave rejection, the amplitude of the vibration was remarkably reduced and persistent vibration was suppressed. It shortens the settling time of the EMFR weighing cell and avoids the aging of the machine. Furthermore, the vibration suppression was realized even when there is a load. The water surface in the vial bottle was not fluctuated and immediately settled at the lift-up operation. Reflected-wave rejection certainly contributes to reduce the time for weighing. Acknowledgment This work was partially supported by JSPS KAKENHI Grant Number 18H03784.
Publisher Copyright:
© 2019 The Institute of Electrical Engineers of Japan.
PY - 2019
Y1 - 2019
N2 - High-speed and high-precision weighing is required in industrial and medical fields. Recently, medical services have improved rapidly and the demand for medicines have increased. Because improper medication can lead to life-threatening symptoms, precise filling and weighing all medicines are vital processes. On the other hand, there are requirements from suppliers to increase production volume. For this problem, Reduction the time by applying vibration-suppression control for a weighing cell is presented. The weighing cell exhibits oscillating responses as it has vibration mechanism inside. This vibration increases the weighing time and then reflected-wave rejection is introduced to suppress the vibration. Because reflected-wave rejection is a phase-stabilizing method, the controller attains a robustness against modeling errors. As a result, the weighing cell did not vibrate regardless of existence of a load. In addition, lift-up operations of vial bottles with water by the weighing cell were also conducted. The water surface did not fluctuate and immediately settled. Reflected-wave rejection certainly contributes to reducing the time for weighing.
AB - High-speed and high-precision weighing is required in industrial and medical fields. Recently, medical services have improved rapidly and the demand for medicines have increased. Because improper medication can lead to life-threatening symptoms, precise filling and weighing all medicines are vital processes. On the other hand, there are requirements from suppliers to increase production volume. For this problem, Reduction the time by applying vibration-suppression control for a weighing cell is presented. The weighing cell exhibits oscillating responses as it has vibration mechanism inside. This vibration increases the weighing time and then reflected-wave rejection is introduced to suppress the vibration. Because reflected-wave rejection is a phase-stabilizing method, the controller attains a robustness against modeling errors. As a result, the weighing cell did not vibrate regardless of existence of a load. In addition, lift-up operations of vial bottles with water by the weighing cell were also conducted. The water surface did not fluctuate and immediately settled. Reflected-wave rejection certainly contributes to reducing the time for weighing.
KW - Disturbance observer
KW - Nominal parameter
KW - Sensorless force control
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U2 - 10.1541/ieejjia.8.576
DO - 10.1541/ieejjia.8.576
M3 - Article
AN - SCOPUS:85071627144
SN - 2187-1094
VL - 8
SP - 576
EP - 585
JO - IEEJ Journal of Industry Applications
JF - IEEJ Journal of Industry Applications
IS - 4
ER -