Abstract
A pneumatic servo presented has a feature to set a by-pass valve in a conduit with a proper resistance connecting both rooms in the power cylinder, and to make the valve open and closed at each proper time for the improvement of damping in positioning of the step response. In application of this method to a single rod cylinder, a distinct difference is found between cases of extension and retraction of the piston. In the latter case, the merits of the by-pass method are reduced a little, so another little modefied method also has been examined. Means of making use of the by-pass valve properly including the case of double rod cylinder are presented to each case. Experimental results are compared with computer simulations, and good coincidence is obtained.
