Design And Development Of The Software Platform Of Experiment System For Ball Mill Decoupling Control

Ball mill pulverizing system is important heat-power equipment in fossil-fired power plants&cement plants etc. Such system is multivariable, strongly coupled, nonlinear process with large time delay, and has a lot of uncertain disturbances. It is difficult to use conventional automatic control strategies into practice, so how the technology applies to decoupling control of ball mill pulverizing system has become hot research issue. Supported by "985Project" Process Industry Integrated Automation Technological Creativity Platform Construction, the software platform of Ball mill decoupling control is designed and developed, and a practical and efficient study platform is established for the further research of decoupling control technique.The main contributions of this thesis are listed as follows:(1) Using the modular design idea, the software platform for ball mill decoupling control system is designed, including the object sub-platform, which is used to simulate dynamic and static characteristic as well as the coupling relationship of ball mill, and the decoupling control sub-platform. The management module used for adding, deleting and choosing the object mode is designed, and the experimental model module and mechanism model module of ball mill in model library is also designed. Decoupling control sub-platform is used for experimental study of various decoupling control algorithms. The algorithm library management module used for adding, deleting and choosing the algorithms is designed. The static decoupling control algorithm module and the dynamic decoupling control algorithm module in model library are designed. The auxiliary function module used for user management and data management is also designed.(2) Based on the LabVIEW software, the decoupling control experimental system software platform of the ball mill, which includes the object sub-platform and the decoupling control sub-platform, is developed. In the object sub-platform, the model is dynamically invoked through name and path to realize the function of library management, and the transfer function is discretized to achieve the numerical solution of the experimental model of Ball mill. The Kutta fourth-order ODE method is used to achieve the cyclic solving of the differential equations of mechanism model of ball mill. In the decoupling control sub-platform, the decoupling control algorithm library, including the static decoupling control algorithm module and the dynamic decoupling control algorithm module, is developed. The model is dynamically invoked through name and path to realize the function of library management. The auxiliary function module used for user management and data management is also designed.(3) The functional verification and experimental study of the software platform of the ball mill decoupling control experiment system have been done. The control algorithm experimental research of non-decoupling single-loop, static decoupling and dynamic decoupling has been carried out to verify the effectiveness of the platform...