复杂工程系统混合动力学的分层建模方法

R. Wang, X. Wang, Jiechao Yang, Liwen Kang
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引用次数: 0

摘要

复杂的工程系统可以是连续的、离散的,也可以是混合的。与其他类型的复杂工程系统相比,混合系统由于其系统的连续和离散行为以及内部和外部的不确定性相结合,是最难分析的系统。对复杂的工程系统进行建模和仿真,以探索其动力学并评估不同管理策略的效果是必要的。现有的复杂工程系统特别是混合系统的建模和仿真方法多侧重于解决具体系统或场景中的问题,忽视了方法的可重用性和简单性。本文提出了一种通用的复杂工程系统分层建模方法,说明了如何处理连续和离散动力学问题,并采用混合仿真方法验证了该方法的可行性和有效性。以某铜冶炼厂为例,用该方法描述了复杂工程系统的生产过程。仿真结果表明,通用的分层建模方法能较好地、简单地描述系统中的复杂动力学,有助于复杂工程系统的研究。
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A Hierarchical Modeling Method for Complex Engineering System with Hybrid Dynamics
Complex engineering systems can be continuous, discrete, as well as hybrid. Comparing with other kinds of complex engineering systems, the hybrid one is the most difficult to be analyzed because of its combination of continuous and discrete behaviors of the system, as well as the internal and external uncertainties. It is necessary to model and simulate the complex engineering system to explore its dynamics and evaluate the effect of different management strategies. Existing modeling and simulation methods of complex engineering systems, especially hybrid system, mostly focus on solving problems in specific systems or scenarios, neglecting the reusability and simplicity of methods. In this paper, a universal hierarchical modeling method for complex engineering system is proposed, which illustrates how to deal with continuous and discrete dynamics, and hybrid simulation method is applied to verify the feasibility and availability. A copper smelter is taken as one case of complex engineering system, and the production process in the smelter is described by the proposed method. Results of simulation show that the universal hierarchical modeling method can describe complex dynamics in the system properly and simply, which contributes to the study on complex engineering system.
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