Abstract A hybrid cutterhead driving system combing frequency conversion motor with hydraulic motor was proposed to solve the cutterhead stuck strait of a Hard Rock Tunnel Boring Machine (TBM). Added with a constant value, the speed signal of electronic motor under torque following master slave strategy was used to regulate the displacement of the pump, the redundant fluent venting by the proportional relief valve built proportionally controllable work pressure of the hydraulic motor.The hybrid driving system was founded on the TBM test rig.With the purpose of finding an optimal variable displacement pump control strategy, Load Sensitive Control System (LSCS), Flow Feedback Proportional Control System (FFPCS) and cylinder Displacement Feedback Proportional Control System (DFPCS) were respectively established in AMEsim. The flow and press responses of variable displacement pump under different control strategies indicated that LSCS couldn't track the jump change of speed signal, FFPCS and DFPCS had similar dynamic respond of input signal. Considering the high expense and low reliability of flux transducer, though FFPCS has the advantage of accuracy and efficiency, DFPCS is finally selected to be used in the text rig.
LIU Tong, GONG Guo-fang, ZHANG Zhen, PENG Zuo, WU Wei-qiang. Design and simulation analysis of hybrid cutterhead driving system for TBM test bed. Chinese Journal of Engineering Design, 2015, 22(5): 438-444.
