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首页> 外文期刊>Proceedings of the IEEE >Continuous-discrete interactions in chemical processing plants
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Continuous-discrete interactions in chemical processing plants

机译：化学加工厂中的连续离散相互作用

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摘要

This paper discusses important hybrid aspects of chemical processing plants. It is outlined that discrete phenomena occur both on the physical level and in the control of these plants. As the dynamics of the transformations of energy and material are predominantly continuous, large and complex hybrid systems arise. We focus on three different aspects of dealing with such systems: (1) Modeling and simulation of hybrid systems for the design and optimization of plants, controllers and operating strategies. We present powerful simulation environments that have been developed in recent years. (2) Validation of plant instrumentation and discrete controllers. These systems are largely responsible for the safe and economic operation of chemical plants and the protection of the workforce, and the environment. Techniques for the verification of discrete controllers for continuous processes are discussed, which are based on a discrete approximation of the continuous dynamics. (3) Scheduling of batch plants. For plants that are operated in a discontinuous fashion, the timing and sequencing of the operations are very important for the efficient use of the equipment. This leads to large mixed-integer optimization problems. For a typical example, we show how the process and the constraints can be modeled and describe an efficient solution algorithm.
机译：本文讨论了化学加工厂的重要混合方面。概述了离散现象在物理水平上以及在这些植物的控制中均发生。由于能量和材料转换的动力学主要是连续的，因此出现了大型而复杂的混合系统。我们专注于处理此类系统的三个不同方面：（1）混合系统的建模和仿真，用于工厂，控制器和操作策略的设计和优化。我们介绍了近年来开发的强大的仿真环境。 （2）验证工厂仪表和离散控制器。这些系统在很大程度上负责化工厂的安全和经济运营，以及对员工和环境的保护。讨论了验证连续过程离散控制器的技术，这些技术基于连续动力学的离散近似。 （3）批处理工厂的计划。对于以不连续方式运行的工厂，操作的时间安排和顺序对于有效使用设备非常重要。这导致了大的混合整数优化问题。对于一个典型的例子，我们展示了如何对过程和约束进行建模，并描述了一种有效的求解算法。

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