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| Design and simulation analysis of hybrid cutterhead driving system for TBM test bed |
| LIU Tong, GONG Guo-fang, ZHANG Zhen, PENG Zuo, WU Wei-qiang |
| State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China |
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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.
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Received: 10 June 2015
Published: 28 October 2015
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TBM试验台刀盘混合驱动系统设计与仿真分析
针对全断面硬岩隧道掘进机（TBM）在施工时因驱动扭矩不足引发的刀盘卡死情况，提出了由变频电机和泵控马达混合驱动的方案.采集电机转矩跟随主从控制系统下的电机速度信号，叠加一个预设的常量来实时调节变量泵的排量，利用比例溢流阀溢流多余流量实现对马达工作压差的比例调节，从而实现泵马达系统对电机系统的转速跟随和扭矩可调，并基于Φ2.5m TBM实验台的刀盘驱动系统指标要求完成了设计选型.在AMEsim仿真平台上搭建了负载敏感变量泵控系统（LSCS）、流量反馈比例变量泵控系统（FFPCS）和变量缸位移反馈比例变量泵控系统（DFPCS）的模型，分析对比了不同系统在同一电机系统速度信号下泵的压力和流量响应，并对比了不同比例控制策略下变量泵的效率.结果表明：LSCS无法响应电机系统转速跳变，且不适用于闭式系统，FFPCS和DFPCS均能较好地跟随电机系统的转速变化，尽管FFPCS有着更高的控制精度和效率，DFPCS的高可靠性、模块化和低成本优势更符合实际施工要求.
关键词：
TBM,
刀盘混合驱动系统,
刀盘卡死,
比例变量泵,
AMESim仿真
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