Control Method of Axis Correction for Shield Tunneling Machine in Subway Tunnels
The precision of shield tunneling axis control directly affects the construction quality and safety of sub-way tunnel.Therefore,it is of great importance to study the control method of axis correction for shield tunne-ling machine in subway tunnel based on swarm algorithm and nonlinear parameter observation to improve the anti-interference of axis correction control.Based on the mechanical model of shield tunneling in subway tunnel,a nonlinear controller is designed to correct the driving axis of shield tunneling machine.After introducing the chaotic initialization mechanism of Cat mapping into the swarm algorithm,the nonlinear controller parameters are updated by the algorithm to improve the precision of deviation correction control.The nonlinear interference observer is introduced into the nonlinear controller to estimate the nonlinear external interference force of the shield machine during driving,and the final nonlinear control quantity of the shield machine driving axis correc-tion is obtained,so as to complete the correction control.Experimental results show that the method can effec-tively estimate the nonlinear external interference force generated by shield tunneling machine in subway tunnel and realize the alignment control of shield machine driving axis.The error of this method is small and controlled within 0.1 mm when the voltage command of the relief valve is in different proportions,which indicates that the method has better anti-interference.
swarm algorithmnonlinear parameter observationsubway tunnelshield tunneling machinedriving axisdeviation correction control
万方数据
维普
