| 摘要 |
PURPOSE:To enable posture control to cope with all tunnel linear forms from a straight line to a sharp curve and automatic control irrespective of differences between the outer diameters and specifications of shield machines by applying a fuzzy theory having values of 4 variables as input variables. CONSTITUTION:From a desired azimuth thetah, pitching angle thetav, halfway folding (left and right) angle phih, halfway folding (upper and lower) angle phiv in 1 ring excavation of a shield machine having a halfway folding mechanism and the measured present azimuth thetah', pitching angle thetav', halfway folding (left and right) angle phih', halfway folding (upper and lower) angle phiv' are obtained values of at least 4 variables of a desired control angle (horizontal) thetah=thetah-thetah', desired control angle (vertical) thetav=thetav-thetav', halfway fold achieving rate (left and right) etah=(phih'/phih)X100 and halfway fold achieving rate (upper and lower) etav=(phih'/phiv)X100. Necessary one-sided pushing degree divided into the respective left, right, upper and lower directions are figured out by a fuzzy theory using the values of the 4 variables for input variables and taking in know-how of a skilled operator to be used for use patterns corresponding to the necessary one-sided pushing degree in the beginning of the excavation by a shield jack. |
