Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Automatic Tension Control of a Timber Carriage Used for Biomass Collection

  • Choi, Yun-Sung (Dept. of Bio-system Engineering, Kangwon National University) ;
  • Oh, Jae-Huen (Korea Forest Research Institute) ;
  • Euh, Seung-Hee (Dept. of Bio-system Engineering, Kangwon National University) ;
  • Oh, Kwang-Cheor (Dept. of Bio-system Engineering, Kangwon National University) ;
  • Choi, Hee-Jin (Dept. of Bio-system Engineering, Kangwon National University) ;
  • Kim, Dae-Hyun (Dept. of Bio-system Engineering, Kangwon National University)
  • Received : 2012.04.20
  • Accepted : 2012.04.27
  • Published : 2012.04.30
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Abstract

Purpose: A lab-scale timber carriage using a servo motor system was built. When two motors move a carriage, wire tension is changed according to the different line speeds caused by a wire drum's changing diameter, leading to inappropriate traveling characteristics of the carriage. In order to overcome this problem, PID Control was used to control the motor speed. Methods: Ziegler-Nichols method was used to determine PID gains. Results: The initial PID gains were 1.8, 0.025, and 0.006, respectively, and optimal gains of 1.4 and 0.010 for P and I gain were obtained experimentally. Conclusions: The results showed that constant wire tension could be maintained by controlling the speed of the motor using PI control. Overshoot occurred at initial motor operation due to vibration and elasticity of the wire itself.

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References

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