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In recent years, electronic control has become mainstream of pneumatic control systems. But pneumatic positioning systems have advantages such as explosion proof, operable even at power failure, simple structure, easier maintenance, and low price. Therefore, with fusion of mechanical feedback technology and latest technology, it is possible to realize an advanced system required for realize a safe and secure society, and it can be expected to be applied in a wide field in the future. In this study, we aim to develop advanced system incorporating pneumatic positioning systems with mechanical feedback, we propose a model of the pneumatic positioning systems with mechanical feedback, perform characteristic analysis using the model, and evaluate the effectiveness of the model by comparing with the experiment result. In this paper, step response experiments were carried out using three different sizes of cylinders, and the results of the step response experiment and the simulation were compared. As a result, except for high input pressure, the transient characteristics of both were in good agreement. Therefore, it proved that the proposed model is effective for analyzing the transient characteristics of the system incorporating pneumatic positioning systems with mechanical feedback. We also obtained the prospect that the characteristics analyzed using the proposed model can be used for developing new applications.

Modeling and characteristic analysis of pneumatic positioning system with mechanical feedback