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Deep learning controller design of embedded control system for maglev train via deep belief network algorithm

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Abstract

The maglev train has been successful in practice as a new type of ground transportation. Owing to the inherent nonlinearity and open-loop instability of the electromagnetic suspension (EMS) system, an analogue or a digital controller is used to control the maglev trains’ stability. With the rapid development of embedded systems and artificial intelligence, intelligent digital control has begun to replace the conventional analogue control technology creating a new approach to the EMS control system. This paper proposes a hardware module for an embedded levitation controller based on digital signal processor and field programmable gate array, hence producing an open loop mathematical model of the embedded maglev control system. The deep learning controller is then developed based on a deep belief network (DBN) algorithm and a proportional integral derivative feedback controller. The simulations are conducted in the MATLAB environment after training the DBN. Simulation results are compared with those obtained from the conventional controller. Finally, experiments are implemented to examine the feasibility in practice of the application of the DBN into a maglev embedded control system. The system, with the proposed controller, can accurately track the target airgap of 8 mm. The maximum tracking error of sinusoidal trajectory is 0.17 mm and the maximum tracking error of step trajectory is 0.98 mm. Both simulation and experimental results are included in this paper to show that the proposed deep learning controller can be more robust and less complicated to implement in maglev control applications.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant 51905380, by China Postdoctoral Science Foundation under Grant 2019M651582, by independent Research Project of State Key Laboratory (No. TPL1711) and Funded Project of National Key Research and Development Plan (2016YFB1200601).

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Authors and Affiliations

  1. Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China

    Ding-gang Gao & Shi-hui Luo

  2. Maglev Transportation Engineering R&D Center of Tongji University, Shanghai, 201804, China

    Ding-gang Gao, You-gang Sun & Guo-bin Lin

  3. CRRC Zhuzhou locomotive Co., Ltd., Zhuzhou, 412001, Hunan, China

    Lai-sheng Tong

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  1. Ding-gang Gao
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  2. You-gang Sun
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  3. Shi-hui Luo
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  4. Guo-bin Lin
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  5. Lai-sheng Tong
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Correspondence to You-gang Sun.

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Gao, Dg., Sun, Yg., Luo, Sh. et al. Deep learning controller design of embedded control system for maglev train via deep belief network algorithm. Des Autom Embed Syst 24, 161–181 (2020). https://doi.org/10.1007/s10617-020-09237-3

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  • DOI: https://doi.org/10.1007/s10617-020-09237-3

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