Abstract:  To deal with the features of bed temperature control of circulating fluidized bed boilers, such as large inertia, time-variant, multi-interference factors, a PID predictive control algorithm based on Laguerre function model is proposed. In this algorithm it changes the rolling optimization index of the predictive control algorithm based on Laguerre function model into a PID type structure. Combining the advantages of PID control and predictive control, this algorithm improves the speed, stability and robustness of the control system. The algorithm is applied to bed temperature control of circulating fluidized bed boilers, the simulation results show that it has good control quality.

Key words: Bed temperature control, predictive control, Laguerre model, PID control

摘要： 针对循环流化床锅炉(Circulating Fluidized Bed Boilers，CFBB)床温被控对象的大惯性、时变性、干扰因素多等特点，提出一种基于Laguerre函数模型的PID预测控制算法(LMPC-PID)。该算法在基于Laguerre函数模型的预测控制算法的基础上，将滚动优化的指标改成PID型结构，结合PID控制与预测控制的优点，提高了控制系统的快速性、稳定性和鲁棒性。通过对循环流化床锅炉床温的被控对象进行仿真研究，结果表明该算法具有良好的控制品质。

关键词: 床温控制, 预测控制, Laguerre模型, PID控制