Pneumatic servomechanism by electro-pneumatic on-off valve with disk flapper

In our recent report, we proposed a new electro-pneumatic on-off valve with a disk flapper driven by a pulse motor and we made its performance clear experimentally. It is the purpose of this paper that an electro-pneumatic servomechanism (a simple two-directional pneumatic servomechanism) by the PWM driving technique can be made up as an application of this valve. In order to estimate the performance to its servomechanism, the output power, the positioning accuracy and the step response are measured. The positioning accuracy and the output power are tolerable but the speed of the response is comparatively less than those of another pneumatic servomechanisms.