Study On The Methods Of Restraining Segment Erector's Rotation System Starting Impact

Segment erector often exists starting impact phenomenon during the rotary stage due to its high stiffness and the large rotational inertia of segment, which seriously affects the segment control precision. Besides, the quality of tunnel lining and the construction efficiency of shield machine are restricted. Aiming at this problem, this paper uses the methods of structural parameters optimization and control algorithm compensation to restrain the starting impact phenomenon of the segment erector circumferential rotation system. The main research works are as follows:(1) The AMESim simulation model of the segment erector circumferential rotation hydraulic system are built by using AMESim simulation software. Refer to the actual hydraulic components structure parameters and system parameters, AMESim simulation model parameters are set precise. On the basis of the balance valve throttle mathematical equations, the mathematical expression for the the balance valve throttle's flow area with the valve opening size is derived.(2) Based on the mathematical model, the circumferential rotation hydraulic system simulation is analyzed, the segment erector hydraulic system sensitive structural parameters which effect on the rotary system starting working characteristics are extracted. The method of multiple factor orthogonal experiment are used for analyzing the extent of various sensitive structural parameters of the circumferential rotation system which influence on the system starting working characteristics. Besides, the best parameter combination is optimized.(3) The design of circumferential rotation system fuzzy controller is done by using fuzzy control theory. The AMESim/Simulink co-simulation model for segment erector circumferential rotation system is built by co-simulation technology. Compensation effect of the fuzzy controller for rotation system's starting working characteristics is analyzed by simulating the system initial condition..(4) The erector real vehicle test is carried out in co-operation. Experimental results show that the AMESim simulation model and the AMESim/Simulink co-simulation model is correct and reliable. The combing methods of structural parameters optimization and control algorithm compensation have good effects on restraining starting impact phenomena of circumferential rotation system in segment erector.