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在建立了单机架可逆冷轧机全干扰耦合模型的基础上，分析影响板形、板厚、张力的控制量和干扰量，首次提出分步解耦设计策略，相对于常规解耦设计方法可明显简化解耦过程，并给出各解耦环节的简化方案以利于实际工程应用。最后,基于某1420mm六辊单机架UCM冷轧机的实际参数,采用Matlab/Simulink工具对简化后的分步解耦系统进行分析，仿真结果表明该方法可有效消除单机架可逆冷轧机轧制过程中板形、板厚和张力控制之间的耦合影响关系，为单机架可逆冷轧机控制系统设计提供了全解耦控制方案，同时为抗干扰设计提供了便利。

This paper establishes the shape ,gauge and tension coupling model with all disturbance for single stand cold rolling mill based on systematic and theoretical analysis all of the control elements and disturb elements affecting shape, guage and tension. And then, toward characteristics of the model, ordinal decoupling design is put forward which could simplify decoupling process explicitly than normal decoupling design, and simplified method of decoupling channels is given in convenience of practical application. At last, based on actual rolling parameters of a 1420mm 6-hign single UCM cold mill, the decoupling system is analysed by Matlab/Simulink tools, the results show its decoupling effectiveness.