دانلود رایگان مقاله انگلیسی اینترنت اشیا بر اساس لجستیک تولید و سیستم زنجیره تامین و سیستم فیزیکی سایبری - امرالد 2017

Abstract

Purpose – The objective of this paper is threefold: (1) to present IoT-based CPS architecture framework to facilitate the integration of IoT and CPS; (2) to implement an IoT-based CPS prototype based on the architecture framework for a PL application scenario of in a case study; and (3) to devise evaluation methods and conduct experimental evaluations on IoT-based CPS prototype Design/methodology/approach – The design research method, case study, emulation experiment method, and cost-benefit analysis are applied in this research. An IoT-based CPS architecture framework is proposed, and followed by the development of prototype system and testbed platform. Then, the emulation and experimental evaluation of IoT-based CPS are conducted on the testbed, and the experimental results are analyzed. Findings – The emulation experiment results show that the proposed IoT-based CPS outperforms current barcode-based system regarding labor cost, efficiency, and operational adaptiveness. The evaluation of the IoT-based CPS prototype indicates significant improvements in PL tasks and reduced part inventory under a dynamic changing shop-floor environment. Practical implications –The case study shows that the proposed architecture framework and prototype system can be applied to many discrete manufacturing industries, such as automobile, airplane, bicycle, home appliance, and electronics. Originality/value –The proposed IoT-based CPS is among the first to address the need to integrate IoT and CPS for PL applications, and to conduct experimental evaluations and cost-benefit analysis of adopting IoT-based CPS for PL. This paper also contributes to the IoT research by using diverse research methods to offer broader insights into understanding IoT and CPS.

7. Conclusion

This article proposed an IoT-based CPS architecture framework to realize cyber-physical integration and real-time adaptive PL control. Laboratory scale prototype system and testbed were developed to illustrate PL applications and experiment with the key aspects of the IoT-based CPS in application scenarios. The emulation testbed developed in this study can serve both research and education purposes. The use of Lego system to emulate real robots and workstation greatly lower the cost of building an IoT-based CPS prototype for PL without losing educational value, especially for budget constrained laboratories. Based on the case study of this article and its application scenarios, the emulations and experiments were conducted on testbeds to evaluate the proposed IoT-based CPS. Results showed that the IoT-based CPS could cost-effectively perform NLOSPL tasks, align physical material flow and information flow, reduce part inventory, and adapt to environmental changes. These results also imply that adopting IoT-based CPS can significantly improve PL operation in a dynamic shop-floor environment. As shown in the experimental results, the context-awareness of our proposed IoT-based CPS can help an enterprise transform to a more flexible and efficient organization to succeed in a highly dynamic and competitive environment. However, there are still many challenges concerning the practicability of adopting these new technologies in a realistic manufacturing and logistics environments, such as the effort to integrate IoT-based CPS with diverse IoT devices and enterprise systems (ex. ERP, MES), and the lack of a standard for M2M communication protocol across supply chain participants. This research opened up new research directions toward IoT-based CPS in PL and supply chain applications, and also provided a practical guideline for the future development of IoT-based CPS.