Modeling method for dynamic characteristics of earth pressure, shield machine control system and shield machine

Abstract

The invention provides a method for modeling the dynamic characteristics of earth pressure, which includes collecting historical input and output data of the control system as identification data; determining the ARX model structure of the dynamic characteristics of earth pressure in the soil cabin of the earth pressure balance shield machine; and constructing the parameters of the earth pressure ARX model optimization model. The invention also provides a shield machine control system, which includes a data acquisition module, a controller, a model training module and a predictive control module. The invention also provides a shield machine, which includes a shield machine body, a propulsion mechanism and a screw machine. Based on the ARX model, the present invention analyzes and models the pressure of the soil chamber and the operating parameters of the shield machine, and considers the dynamic mode constraints of the earth pressure system during the optimization process of the model parameters, and establishes the earth pressure balance of the earth pressure of the earth chamber of the shield machine. Step forward prediction model to improve the ability of the model to describe the dynamic behavior of the earth pressure system. The model established by the invention can be used in the design of the earth pressure controller, and provides technical support for effectively controlling the pressure of the sealed cabin of the shield machine during the excavation 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...

AI Technical Summary

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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