Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Accurate Positioning with a Pneumatic Driving Apparatus

공기압 구동장치를 이용한 정밀위치제어

  • Jang, Ji Seong (Department of Mechanical System Engineering, Pukyong National University)
  • Received : 2015.08.21
  • Accepted : 2015.11.05
  • Published : 2015.12.01
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Abstract

The accurate position control of pneumatic driving apparatus is considered in this paper. In pneumatically actuated positioning systems, accurate positioning as an electrical servo has been known to be difficult because of the friction force and compressibility of the air. For good control performance of the pneumatic system, an actuator mounted with externally pressurized air bearings is produced to compensate for friction force. For the controller design, the governing equation of the pneumatic driving apparatus is derived. In order to reduce the nonlinear characteristics of the control valve, linearized control input is derived from the relation between the effective area of the valve and the control input. The experimental results are presented to show the results of the improved position control of the pneumatic driving apparatus.

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References

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