Control means for a horizontal boring tool

A horizontal boring tool, for driving a boring lance via boring rods, said boring lance having an asymmetrically slanted hollow boring head with nozzles for a rinsing fluid, said boring head moving on a straight line when said boring rods are advanced rotatingly and said boring head moving on a curved line when said boring rods are advanced without rotating, an orientation of said curved line being determined by an actual roll angle ΦxL of the boring lance, said horizontal boring tool comprising a control means provided with an input interface for receiving actual values of controlled variables of said horizontal boring tool, and an output unit for issuing control signals for controlling said horizontal boring tool, said controlled variables including said roll angle ΦxL, an azimuth angle ΦyL and an inclination angle ΦzL of said boring lance, wherein between said input interface and said output unit, a fuzzy control unit is provided which determines said control signals for controlling at least an advancement of the boring rods and an angle setting Φx1 of torque motor for the boring rods of said horizontal boring tool from the actual values of the controlled variables and desired values for the controlled variables by means of fuzzy logic while taking into account heuristic process values.