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This paper deals with the control system of the segment erector of a shield tunneling machine and reducing the steady-state error and impact force during the positioning process. A segment erector with six degrees of freedom driven by electro-hydraulic system is designed, and the segment erecting process is introduced. The kinematics and dynamics models, as well as the mathematical model of the electro-hydraulic...
The pneumatic frictional clutch is one of chief devices on the mechanical processing apparatus, thus its aerodynamic characteristic during normally working and the compressed air exhausting is discussed. Considering the effect of the back-moving spring in the cylinder on exhausting, and four cases of sonic or subsonic exhaust with constant volume or varying volume, the mathematical model and numerical...
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