Study on Linear Vibration Model of Shield TBM Cutterhead Driving System

Abstract

In this paper, a general linear time-varying multiple-axis (LTVMA) vibration model of shield tunnel boring machine (TBM) cutterhead driving system is established. The corresponding multiple inputs and multiple outputs (MIMO) state-space model is also presented. The linear vibration model is analysed, and the vibration-torque transfer function matrix and the vibration-torque static gain matrix are obtained. The linear vibration model is simulated, and the physical parameters' effects on the vibration response are investigated. A preliminary approach is proposed to reduce vibration by increasing motor rotor inertia and viscous damped. The LTVMA vibration model provides a solid foundation for fault detection and diagnosis (FDD), as long as the health monitoring of cutterhead driving system. NOMENCLATURE nThe number of cutterhead driving motors; q the reducer speed reduction ratio The large gear's contact vibration displacement along i-th pinion's line-of-action directionThe resistant torque of soil and rocks T 2The friction torque of soil and rocks which chafe with the front of the cutterhead T 3The friction torque of soil and rocks which chafe with the back of the cutterhead T 4The friction torque of soil and rocks which chafe with bulkhead T 5The stirring torque of soil and rocks by cutterhead stirring rodThe friction torque of cutterhead bearings and sealed chamber

Sequential and Iterative Distributed Model Predictive Control of Multi-Motor Driving Cutterhead System for TBM

“…Motor drive system is effective in mechanical design, installation and maintenance. If one of the motor angular velocity is lower or higher than the other motor angular velocity for a long time, the motor will be overheating and probably get damaged [6]. To achieve stability of cutterhead driving, angular velocity control is of crucial importance [7].…”