冶金石灰窑燃烧过程模糊预测控制策略应用

Fuzzy Predictive Control in Combustion Process of the Metallurgy Lime Kiln

冶金石灰窑燃烧温度和进程的控制是保证产品质量的关键,由于它属于非线性、大滞后的热工过程被控对象,常规的PID和Fuzzy以及单纯的预测控制方法难以达到满意的效果。通过对其煅烧过程涉及的物理和化学反应机理分析,阐述了石灰窑生产系统的非线性、多变量和多参数影响的复杂特性以及系统的控制目标,并根据仿真要求对燃烧控制系统的数学模型进了参数辨识。在此基础上,采用预测控制和模糊决策相结合的控制方案,通过仿真分析验证控制算法的有效性,并以工业现场套筒石灰窑为应用对象,投入实际控制运行,取得了良好的效果。

The combustion temperature and progress of metallurgy lime kiln are important for the lime production quality. Lime kiln is a nonlinear delay object. The traditional proportion integration differentiation control, fuzzy control and predictive control cannot achieve satisfactory results. This paper analyzes the combustion mechanism in physics and chemistry, expounds the control target of the production system and complex characteristics which are affected by nonlinear, multivariable and multi-parameter factors. And then the simplified mathematical model of the combustion control system is deduced based on the requirements of simulation. In addition, the fuzzy predictive control, a new kind of predictive control method is used here, combining the advantages of predictive control with the fuzzy control. The simulation analysis verifies the effectiveness of the control algorithm, and the actual control operation of the sleeve kiln in the industrial site obtains mood effect.