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以适用于多能域系统建模的键合图为工具,论述了复杂机电系统键合图相似的前提条件,推导出了键合图各要素相似所对应的动力学相似条件,在此基础上,根据基于键合图的模态分析理论,进一步进行了系统模态相似研究,给出了系统频率、振型等主要模态参数的相似关系,从而提出了复杂机电系统动力学相似的键合图分析法。利用该方法既能很容易地导出系统的相似要求,而无需知道各现象的物理方程,又可以实现用简单的单能域模型系统来对多能域原型系统进行动力模型试验和仿真研究,从而为工程中复杂机电系统的动力学相似研究提供了新的方法和思路。所提供的算例表明,该方法在指导复杂机电系统动力学仿真及模型试验时,能快速、简便而又直观地得到系统相似所需满足的相似条件。
Based on the bond graph which is suitable for the modeling of pluripotent domain system, this paper discusses the similar prerequisites of bond diagrams of complex electromechanical systems, and deduces the dynamic similarity conditions corresponding to the similarity of bond elements. Based on this, According to the modal analysis theory based on the bond diagram, the modal researches of the system are further studied. The similarity of the main modal parameters such as the system frequency and mode shape is given, and the bonds with similar dynamics of the complex electromechanical system are proposed Graph analysis method. The method can not only derive the similar requirements of the system easily but also do not need to know the physical equations of each phenomenon and also can carry out dynamic model test and simulation research on the multi-energy domain prototype system with a simple single-domain model system It provides a new method and idea for the dynamic researches of complex electromechanical systems in engineering. The provided examples show that this method can quickly, easily and intuitively obtain the similar conditions that the system needs to meet in the guidance of dynamic simulation and model test of complex electromechanical systems.