Design And Development Of The Intelligent Optimal Control Software Platform Of Rotary Kiln

Rotary kiln is widely used in metallurgy, mineral processing, cement and environmental protection. Since rotary kiln process has control puzzles such as strong coupling, non-linearity and technics parameters with serious disturbances, it is difficult to achieve automatic and optimal control. The research on intelligent optimal control technology of rotary kiln and intelligent optimal control platform, is significant in improving clinker quality and equipment utilization, saving energy and reducing consumption.The intelligent optimal control software platform of rotary kiln is a kind of application software to control and monitor rotary automation. The technology of foreign control system software is non-transparent. Although their control on basal loop is stable, intelligent control is rarely mentioned. Because of the development of domestic software platform starts later than abroad, their structure of the platform isn't strong enough and reuse rate of code isn't high enough. Therefore, the research on intelligent optimal control software platform with modular structure and the function of developing intelligent optimal control strategies is necessary.This paper, supported by the Northeastern University 863 Project of intelligent control system of rotary kiln, designs the structure of the intelligent optimal control software. The may target of this paper is to design and develop intelligent optimal control software platform of rotary kiln based on the original project. The detailed works have been summarized as follows:1. The whole structure and function of the platform are designed. The structure of the platform is established and combined with modules organically. We organize the structure of intelligent optimal control software platform with more clarity and reusability.2. The platform is divided into four modules:plot module for human machine interaction of rotary kiln, database module for the management of control volume and detection volume, communicate module for data transmission with lower computer, strategy module for development of intelligent optimal control. The structure and function of each module is designed, developed and introduced in details. In order to achieve ease of use and scalability, powerful base classes are designed and implemented by the object-oriented language.3. To the strategy module, a method is proposed based on the design of flow chart, generating script dynamically, explaining and implementing by compiler of the system. This method can reduce the volume of developers programming, so they can focus on the development of intelligent control algorithm. And the way of flow chart configuration has highly intuitive and easy to learn. In order to expand the functions of the software, C-similar language is implemented as the platform API.4. System Testing and related experimental verification is made on the intelligent optimal control software platform. Test case is designed for each modular. The experiment of process mapping and the experiment of PID algorithm is designer for the whole system. The results prove the effectiveness of the design and the feasibility of the development.