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Determination of PID Coefficients for the Ascending and Descending System Using Proportional Valve of a Rice Transplanter

  • Siddique, Md. Abu Ayub (Dept. of Biosystems Machinery Engineering, Chungnam National University) ;
  • Kim, Wan-Soo (Dept. of Biosystems Machinery Engineering, Chungnam National University) ;
  • Baek, Seung-Yun (Dept. of Biosystems Machinery Engineering, Chungnam National University) ;
  • Kim, Yeon-Soo (Dept. of Biosystems Machinery Engineering, Chungnam National University) ;
  • Choi, Chang-Hyun (Dept. of Mio-Mechatronics Engineering, Sungkyunkwan University) ;
  • Kim, Yong-Joo (Dept. of Biosystems Machinery Engineering, Chungnam National University) ;
  • Park, Jin-Kam (LS Mtron Ltd. Tractor Advanced R/D group)
  • Received : 2018.10.31
  • Accepted : 2018.12.04
  • Published : 2018.12.01

Abstract

Purpose: This study was conducted to develop a linear Proportional-Integral-Derivative (PID) control algorithm for the ascending and descending system of a rice transplanter and to analyze its response characteristics. Methods: A hydraulic model using a single-acting actuator, proportional valve and a PID control algorithm were developed for the ascending and descending system. The PID coefficients are tuned using the Ziegler-Nichols (Z-N) method and the characteristics of unit step response are analyzed to select the PID coefficients at various pump speeds. Results: Results showed that the performance of the PID controller was superior in any condition. It was found that the highest settling time and maximum overshoot were less than 0.210 s and 5%, respectively at all pump speed. It was determined that the steady state errors were 0% in all the cases. The lowest overshoot and settling time were calculated to be nearly 2.56% and 0.205 s, respectively at the pump rated speed (2650 rpm). Conclusions: The results indicated that the developed PID control algorithm would be feasible for the ascending and descending system of a rice transplanter. Finally, it would be helpful to plant the seedlings uniformly and improve the performance of the rice transplanter.

Keywords

References

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