分離型調節弁ポジショナの制御特性

概要

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Modern process control valves are often used in combination with positioners that control the main valve stroke corresponding to an input signal. Pneumatic positioners have advantages over electric positioners in an environment where explosive hazards are a concern. However, pneumatic positioners are relatively sensitive to vibration because they have fine moving parts in the pilot stage. A separate-type positioner can solve this problem. It contains long tubing connecting the chamber of the main valve and the pilot stage, so that it is possible to position the pilot stage at a vibration free location. This then gives rise to the question of the magnitude of the transmission lag inherent with long tubing. This paper provides an answer to this question and submits a simulation technique to estimate the dynamics of the separate-type valve positioners.
社団法人　日本フルードパワーシステム学会の論文
2006-09-15