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Behavior Prediction and Inverse Design for Self-Rotating Skipping Ropes Based on Random Forest and Neural Network

Author

Listed:
  • Yunlong Qiu

    (School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China)

  • Haiyang Wu

    (School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China)

  • Yuntong Dai

    (School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China)

  • Kai Li

    (School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China)

Abstract

Self-oscillatory systems have great utility in energy harvesting, engines, and actuators due to their ability to convert ambient energy directly into mechanical work. This characteristic makes their design and implementation highly valuable. Due to the complexity of the motion process and the simultaneous influence of multiple parameters, computing self-oscillatory systems proves to be challenging, especially when conducting inverse parameter design. To simplify the computational process, a combined approach o0f Random Forest (RF) and Backpropagation Neural Network (BPNN) algorithms is employed. The example used is a self-rotating skipping rope made of liquid crystal elastomer (LCE) fiber and a mass block under illumination. Numerically solving the governing equations yields precise solutions for the rotation frequency of the LCE skipping rope under various system parameters. A database containing 138,240 sets of parameter conditions and their corresponding rotation frequencies is constructed to train the RF and BPNN models. The training outcomes indicate that RF and BPNN can accurately predict the self-rotating skipping rope frequency under various parameters, demonstrating high stability and computational efficiency. This approach allows us to discover the influences of distinct parameters on the rotation frequency as well. Moreover, it is capable of inverse design, meaning it can derive the corresponding desired parameter combination from a given rotation frequency. Through this study, a deeper understanding of the dynamic behavior of self-oscillatory systems is achieved, offering a new approach and theoretical foundation for their implementation and construction.

Suggested Citation

  • Yunlong Qiu & Haiyang Wu & Yuntong Dai & Kai Li, 2024. "Behavior Prediction and Inverse Design for Self-Rotating Skipping Ropes Based on Random Forest and Neural Network," Mathematics, MDPI, vol. 12(7), pages 1-20, March.
    • Handle: RePEc:gam:jmathe:v:12:y:2024:i:7:p:1019-:d:1366067
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    References listed on IDEAS

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