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工业大系统双层结构预测控制的集中优化与分散控制策略

DOI: 10.3724/SP.J.1004.2013.01366, PP. 1366-1373

Keywords: 预测控制,子系统,前馈控制器,双层结构,大系统

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Abstract:

?为降低工业大系统模型预测控制(Modelpredictivecontrol,MPC)在线计算复杂度,同时保证系统的全局优化性能,提出一种集中优化、分散控制的双层结构预测控制策略.在稳态目标计算层(Steady-statetargetcalculation,SSTC),基于全局过程模型对系统进行集中优化,将优化结果作为设定值传递给动态控制层;在动态控制层,将大系统划分为若干个子系统,每个子系统分别由基于各自子过程模型的模型预测控制进行控制,为减少各子系统之间的相互干扰,在各个子系统之间添加前馈控制器对扰动进行补偿,提高系统的总体动态控制性能.该策略的优点在于能确保系统全局最优性的同时降低了在线计算量,提高了工业大系统双层结构预测控制方法的实时性.仿真实例验证该方法的有效性.

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