Modeling of Hydraulic Controlled and Regulated Direct Method in the Cutter System of Shield Tunneling Machine

This paper is mainly concerned with the technology about how to improve the response of the cutter system when the shield machine encounters sudden load changes. By analyzing the conventional control method of the displacement of the pump, a new control method named as hydrauLic controlled and regulated direct method is proposed. In order to make a comparison between the two control methods, the two simulation models are constructed in AMESim software. The simulation results show that the new control method has a shorter response time and better dynamic behavior, when the shield machine encounters sudden load changes and the system pressure jumps from 7 MPa to 25 MPa. The length of the pipe between the shuttle valve and the pump is taken into account in affecting the response of the system.