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针对热轧带钢连轧过程中,张力干扰引起厚度控制精度降低的情况,在综合分析厚控系统与活套系统之间相互作用基础上,建立了多变量、强耦合厚度-活套非线性动态模型,提出将逆系统理论应用于该模型的解耦控制策略。在证明AGC-LP系统可逆的条件下,建立了该模型的逆系统,将原非线性系统解耦成为AGC-LP复合伪线性系统,采用线性控制理论设计解耦控制器,实现了AGC-LP非线性系统解耦控制。仿真结果验证了所建模型的合理性和控制方案的可行性。
In order to reduce the thickness control accuracy caused by tension disturbance during the hot strip rolling process, based on the comprehensive analysis of the interaction between the thick control system and the looper system, a multivariable, strongly coupled thickness-looper nonlinear system Dynamic model, the inverse system theory is proposed for the decoupling control strategy of the model. Under the condition that the AGC-LP system is proved to be reversible, the inverse system of the model is established. The original nonlinear system is decoupled into the AGC-LP complex pseudo-linear system. The linear control theory is used to design the decoupling controller. The AGC-LP Nonlinear system decoupling control. The simulation results verify the rationality of the model and the feasibility of the control scheme.