Study on Thrust Vector Control Method for Shield Synchronous Propulsion and Assembly Based on Thrust Uniformity
To achieve precise control of shield attitude during the synchronous propulsion and assembly process,a study was conducted on the construction efficiency and thrust vector control method of shield synchronous propul-sion and assembly,based on the Nantong-Suzhou-Jiaxing-Ningbo High-speed Railway.A thrust calculation model based on segmented lining and a thrust vector allocation method based on thrust uniformity were proposed.The effects of total thrust magnitude,thrust eccentric direction,and eccentric distance on the thrust of each cylinder were ana-lyzed.The results indicate that,under constant tunnelling speed,assembly speed,and segment width,the cylinder stroke is the key factor affecting the efficiency of synchronous propulsion and assembly.Theoretically,the half-syn-chronous propulsion and assembly mode can improve efficiency by over 21％,while the full-synchronous mode can increase it by 47％.The thrust of each cylinder initially increases linearly with the total thrust and changes non-linearly with periodic variation as the eccentric direction varies.The thrust of the cylinders on the same side as the eccentric direction increases linearly with the eccentric distance,while the thrust of the cylinders on the opposite side decreases linearly,maintaining a constant combined force.Compared to the conventional propulsion and assembly mode,the proposed synchronous propulsion and assembly algorithm model significantly improves computational efficiency while ensuring accuracy,aligning with the concept of cylinder partition control.
Synchronous propulsion and assemblyConstruction efficiencyThrust vector controlSegmented liningCalculation modelOptimization algorithm
万方数据
维普
