A method of accurate position control with a pneumatic cylinder driving apparatus |
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Authors: | Ji-Seong Jang Jung-Hoan Byun |
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Affiliation: | (1) Division of Mechanical Engineering, Pukyong National University, San 100, Yongdang-Dong, Nam-Gu, 608-739 Busan, Korea;(2) Faculty of Marine Technology, Chonnam National University, San 96-1, Dundeok-Dong, Yeosu, 550-749 Jeollanam-Do, Korea |
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Abstract: | In this paper, a method of accurate position control using a pneumatic cylinder driving apparatus is presented. To overcome
the effect of friction force and transmission line, low friction type cylinder applied externally pressurized air bearing
structure is used and two control valves attached both side of the cylinder directly. To compensate nonlinear characteristics
of control valves, linearized control input derived from the relation between control input and effective area of control
valve, and dither signal are applied to the valve. The controller applied to the pneumatic cylinder driving apparatus is composed
of a state feedback controller and a disturbance observer. Experimental results show that the effectiveness of the proposed
method and position control error of 5 μm accuracy could be obtained easily. |
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Keywords: | Accurate Position Control Nonlinear Characteristics Pneumatic Cylinder Driving Apparatus |
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