Abstract
Due to the application of embedded and integrated techniques, electromechanical systems are increasingly becoming complex, especially in the logical relationships for functions and behaviors. Any mistakes in the logical relationships might lead to a hazardous system failure and produce serious consequences. In order to ensure the correctness of the logical relationships, formal methods could be adopted to model the behavior process early in the design phase. The formal notations used in formal modeling, however, are usually difficult to understand. The behavior trees are a kind of graphical modeling notation, which describes the system by a progressive fashion and provides an intuitive understanding of the system. In this paper, behavior trees notation is introduced to model the behavior process of electromechanical systems. From the view of the FBS (Function-Behavior-State) modeling, behaviors are represented as states and their transitions. Taking the behavior process as a discrete event dynamic system, generating of an event and driving of a state transition by the event in the behavior process are investigated and their representations are proposed. Semantics and syntax of the behavior trees are discussed, and representation of states, events and control logics in state transitions is presented based on the characteristics of the state transitions of the electromechanical systems. An approach to modeling behavior process based on behaviors trees is proposed. An example of the feed drive system in a CNC machine tool is presented to illustrate the modeling approach presented in this paper.
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This project is supported by National Natural Science Foundation of China (Grant No. 51375365).
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Appendix
Appendix
Behavior tree model of the feed drive system.
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Yang, P., Xue, C., Liu, Q., Hou, Y., Jia, H. (2018). Modeling the Behavior Process of Electromechanical Systems Based on Behavior Trees. In: Tan, J., Gao, F., Xiang, C. (eds) Advances in Mechanical Design. ICMD 2017. Mechanisms and Machine Science, vol 55. Springer, Singapore. https://doi.org/10.1007/978-981-10-6553-8_25
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DOI: https://doi.org/10.1007/978-981-10-6553-8_25
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