Earth pressure dynamic characteristic modeling method, shield tunneling machine control system and shield tunneling machine

Abstract

The invention provides an earth pressure dynamic characteristic modeling method. The earth pressure dynamic characteristic modeling method comprises the steps of collecting historical input and output data of a control system as identification data; determining a soil cabin soil pressure dynamic characteristic ARX model structure of the soil pressure balance shield tunneling machine; and constructing an optimization model of the parameters of the soil pressure ARX model. The invention further provides a shield tunneling machine control system. The shield tunneling machine control system comprises a data acquisition module, a controller, a model training module and a prediction control module. The invention further provides a shield tunneling machine. The shield tunneling machine comprises a shield tunneling machine body, a propelling mechanism and a screw conveyor. According to the method, based on the ARX model, the soil bin pressure and the shield tunneling machine operation parameters are analyzed and modeled, the dynamic mode constraint of the soil pressure system is considered in the model parameter optimization process, and the multi-step forward prediction model of the soil bin soil pressure of the soil pressure balance shield tunneling machine is established, so that the description capability of the model on the dynamic behavior of the soil pressure system is improved. The model established by the invention can be used for designing an earth pressure controller, and provides technical support for effectively controlling the pressure of the sealed cabin of the shield tunneling machine in the tunneling process.

Description

technical field [0001] The invention relates to the technical field of mathematical modeling, in particular to a modeling method for dynamic characteristics of earth pressure, a shield machine control system and a shield machine. Background technique [0002] The earth pressure control system of the sealed cabin is an important subsystem in the control system of the earth pressure balance shield machine. An important part of the mechanism, it has dual functions of maintaining the stability of the excavation surface and transporting muck. When the shield machine is propelled forward by the propulsion hydraulic cylinder, the rock and soil cut by the cutter head are modified to fill the entire space in the sealed cabin and the screw conveyor shell, and at the same time rely on the filled modified soil to balance the strata of the excavation surface water and soil pressure. The soil discharge volume can be controlled by adjusting the speed of the screw conveyor or the soil int...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the earth pressure control system model of the shield machine established by using mechanical and numerical analysis methods is mainly based on some assumptions that may be different from the actual construction process, and its performance is highly dependent on the accuracy and ease of physical parameters. Problems affected by the external environment

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