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A Variable Speed Control Strategy for Impurity Removal Fan of Sugarcane Combine Harvester based on GA-SVR Model

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Abstract

The sugarcane harvest quality of the sugarcane combine harvester directly determines its popularity and application. In this paper, a genetic algorithm-support vector machine for regression (GA-SVR) model was proposed that used the loading pressure signal and speed signal acquired from a sugarcane combine harvester’s cutting mechanism, walking mechanism, chopper mechanism, and fan mechanism as input variables, and the impurity rate and loss rate as output variables. Then, a variable speed control strategy to match the fan speed and walking speed based on the model was established. The results of the GA-SVR model showed that the predicted value of the sugarcane harvest quality’s mean square error and the determination coefficient (R2) were 0.0144 and 0.9661, respectively. The prediction accuracy was the best among the different models, which included the radial basis kernel function SVR model, sigmoid kernel function SVR model, and polynomial kernel function SVR model. Finally, the GA-SVR model was chosen to determine the optimal matching relation between walking speed and fan speed. According to the matching results, a field experiment was conducted and the results revealed that the average impurity rate and loss rate were 4.88% and 0.46%, respectively. Compared with the industry standard, the impurity rate and loss rate were decreased by 3.12% and 6.54%, respectively. The speed tracking error of the fan mechanism and the walking mechanism was less than 2% after 0.6 s. This control strategy provided a feasible scheme for reducing the impurity rate and loss rate of the sugarcane combine harvester.

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Acknowledgements

The research presented in this paper was partially supported by the National Natural Science Foundation of China (NSFC). Any opinions, findings, and conclusions expressed in this paper are those of the authors and do not necessarily reflect the views of the NSF.

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Correspondence to Yuanling Chen.

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Chen, Y., Zhang, Y., Wang, X. et al. A Variable Speed Control Strategy for Impurity Removal Fan of Sugarcane Combine Harvester based on GA-SVR Model. Sugar Tech 23, 1126–1136 (2021). https://doi.org/10.1007/s12355-021-00987-3

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