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基于内模控制理论,针对自适应逆控制系统中非最小相位对象逆模型的不稳定性,提出了一种新的求解方法,克服了传统方法求取对象模型延时逆的不足。分析了内模控制和自适应逆控制的关系,设计了基于内模控制原理的系统结构,分析了系统的稳定性和算法的收敛性,仿真结果表明这种方法的正确性。将该方法应用于电厂再热汽温控制系统进行仿真研究,结果表明该方法的控制性能优于常规串级控制系统。
Aiming at the instability of inverse model of non-minimum phase object in adaptive inverse control system, a new solving method is proposed based on the theory of internal model control, which overcomes the shortcoming of traditional method to obtain the inverse of delay of object model. The relationship between internal model control and adaptive inverse control is analyzed. The system structure based on the internal model control principle is designed. The stability of the system and the convergence of the algorithm are analyzed. The simulation results show the correctness of this method. The method is applied to the simulation of reheat steam temperature control system of power plant. The results show that the control performance of this method is better than that of conventional cascade control system.