基于集结模型的精馏塔产品质量非线性鲁棒控制

将奇异摄动方法应用于一个二元精馏塔的模型降阶 ,得到了一个用于控制器设计的集结简化模型。考虑到模型的误差和其他不确定性 ,设计了一个基于状态反馈的非线性鲁棒控制器。由于难以实时测量中间状态 ,又设计了一个非线性Luenberger型的观测器 ,使该控制器基于输出动态反馈。应用结果表明 ,该非线性鲁棒控制器对干扰和模型误差具有鲁棒控制作用

Nonlinear robust method based on aggregated models for controlling quality of products in distillation columns

A singular perturbation method was applied to a model reduced order of a binary distillation column, and an aggregated model for designing a controller is deduced. A nonlinear robust controller was designed by taking into account the modeling errors and uncertainties. The proposed controller requires the knowledges of internal status. A nonlinear Luenberger like observer for the estimation of internal status was designed. Thus, the controller is based on dynamic output feedback. Comparing with the proportional integral (PI) controllers and the simple nonlinear controller proposed by Levine, this robust nonlinear controller is of a robust performance for inhibiting disturbances and model errors.