| Tunnel Boring Machine (TBM) Technology, also named 'Shield Technology',is an advanced construction technology with the development of city densification, traffic, aqueduct, electric control and communication equipment, and has become the research focus of engineering field in China with the rapid development of city construction. Based on the investigation and research result by reading, analysing and summarizing lots of literatures,this paper discusses the electro-hydraulic control system of shield machine's push system. According to the principle of separate control the ground deformation during construction and the shield machine's stance can be controlled by controlling the speed and pressure of the push cylinders in use of the Electro-hydraulic proportional control technology. Also the control strategy is studied and proved by modeling, simulation and experiments.Furthermore, in this paper the development process of the monitor software in the upper workstation is described. Keeping to the concept of configuration, a monitor software is developed according to the customers' practical needs and a good code quality is guaranteed. The software has many merits such as convenient operation, good stability, excellent maintainability and very good performance. At last, the difficulties is dicussed and their resolvents are given. Here are the main contents of this paper:Chapter 1,a survey of shield machine's history, current technical status, development trend, and its development meaning for China. At last,the detailed contents of this research project are presented.Chapter 2,first,introduce the overall design scheme of the project. According to the control standard of ground deformation during boring, analyse the theory for earth pressure balance control. Then build up the mathematic model of the push speed control system, analyze its static and dynamic response with the tool of MATLAB. Based on the study of the control characteristic of proportional velocity regulating valve, analyse the improvement effect for system's speed control performance by use of the conditional jump control arithmetic.Chapter 3,first,analyse the stance adjustment theory for shield machine's push system, then build up the mathematic model of the pressure control system. Discuss the improvement effect for system's pressure control performance by use of PID control arithmetic and the influence of environmental factors on system's integrated performance. In addition by simulation and experiment analyse and prove the improvement effect for system's pressure and speed control performance by use of the balance valve in push system of shield machine.Chapter 4, summarize the monitor system of upper workstation, introduce the software structure and discuss the problems during development in detail.Chapter 5, give a brief summarization on this paper and an expectation on the future work. |
PDF Full Text Request