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本文研究了中、小氮肥厂合成氨生产中氢氮比控制问题。文中给出了以机理分析和系统辩识相结合的方法建立的氢氮比系统动态数学模型,对未知模型参数采用在线递推估计技术进行实时辩识,构造出利用中间测量状态的最佳线性预估器,采用自校正控制方案,设计了适合于大时间滞后系统控制的极点配置算法,实现氢氮比控制。同时也绐出了系统的仿真实验曲线。
This paper studies the medium and small nitrogen fertilizer plant ammonia production hydrogen and nitrogen ratio control issues. In this paper, the dynamic mathematical model of hydrogen to nitrogen ratio system, which is established by a combination of mechanism analysis and system identification, is presented. The unknown recursive estimation method is used to estimate the unknown model parameters in real time. Estimator, a self-tuning control scheme is used to design a pole placement algorithm suitable for large-time-lag system control to achieve hydrogen to nitrogen ratio control. Simultaneously also pulls out the system simulation experiment curve.