| Robust control, as an important part of contemporary industrial control systems, penetrates all aspects of the production process. With the advancement of modern industry and the rapid development of computers, industrial process control accuracy requirements become even more stringent. However, as the research objects such as temperature, pressure and so on, this paper will make the control object can not be completely accurate but it is accurate enough. So the robust PID control system is introduced. Robust control combined with the development of Rockwell ControlLogix control platform, network architecture and modular combination of NetLinx, prompted the simplification of control system project. In this thesis, firstly,through Rockwell Software ControlLogix control platform designed to study plasma furnace exhaust gas control system, then the exhaust gas control system as a platform, combined with the production process and control requirements, the debugging of program and actual production applications. Details are as follows:1. The introduction of controlLogix control system and robust PID control system.The controlLogix control platform is easy to configure and design the procedure. The network communication is based on the framework of NetLinx network. The robust PID control system can solve the uncertainty of the controlled system well, and the control of temperature, pressure and flow can be done well by setting and learning parameters.2. Research and design of plasma furnaces off-gas control system. According to the control requirements and the characteristics of the system, established the system of NetLinx network architecture; By using programming software RSLogix5000, combined with the production process, completed the process design of the plasma furnace exhaust system and robust PID control algorithm; using RSLinx communication software, the system network configuration; using FactoryTalk View Studio upper monitoring software, establish emission control system of SCADA and process parameters focus on the touch screen, real-time monitoring and gathering.3. Industrial applications such as plasma furnace exhaust control system. Firstly, selection and installation of the key components, in accordance with industrial electrical wiring principles on the production process of site layout. Secondly, download the program to Rockwell controller 1768-L43, and the program of on-site commissioning and no-load test run. Finally, the debugged program, put into trial operation, monitoring and data acquisition in SCADA interface. After six months of commissioning and production test run, the system basically meet the production control requirements. |
PDF Full Text Request