Although the heat integrated distillation is an energy-efficient and environment-friendly separation technology, it has not been commercialized. One of the reasons is that the nonlinear dynamics and the interactions between various control loops have limited the performance of the traditional control strategy. To achieve a high-purity product concentration, a dynamic decoupling control strategy based on active disturbance rejection control (ADRC) is proposed. The effects of interactions, uncertainties and external disturbances can be estimated and rejected by using extended state observer. Considering the constraints on manipulated variables, an optimized ADRC is designed for the first-order system. Moreover, a concentration observer based on a nonlinear wave model is formulated to reduce the number of sensors. In the simulation research, the related internal model control (IMC), multi-loop ADRC and model predictive control (MPC) are compared with the proposed control scheme. The simulation results demonstrate the advantages of the proposed control scheme on tight control, decoupling performance and disturbance rejection for the high-purity heat integrated distillation column.

中文翻译：

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基于自抗扰控制和非线性波理论的高纯热集成精馏塔过程的解耦控制

热集成蒸馏虽然是一种节能环保的分离技术，但尚未实现商业化。原因之一是非线性动力学和各种控制回路之间的相互作用限制了传统控制策略的性能。为实现高纯度产品浓度，提出了一种基于自抗扰控制（ADRC）的动态解耦控制策略。相互作用、不确定性和外部干扰的影响可以通过使用扩展状态观察器来估计和拒绝。考虑到对操纵变量的约束，为一阶系统设计了优化的 ADRC。此外，还制定了基于非线性波模型的浓度观测器，以减少传感器的数量。在模拟研究中，相关的内部模型控制（IMC）、多回路ADRC和模型预测控制（MPC）与所提出的控制方案进行了比较。仿真结果证明了所提出的控制方案在高纯热集成精馏塔的严密控制、解耦性能和干扰抑制方面的优势。