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Design of control system of solid organic fertilizer spreading device based on BP neural network algorithm
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Pengjun Wang, Yongsheng Chen, Dongxia Sun, Aibing Wu, Yanjie Hao, Mingjiang Chen
Journal of Intelligent Agricultural Mechanization (in Chinese and English) 2021, 2 (1): 13-19. DOI:
10.12398/j.issn.2096-7217.2021.01.002
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202
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In order to ensure that the amount of organic fertilizer applied in the field is accurately controllable and meets the needs of field crop growth, a solid organic fertilizer application control system based on BP neural network algorithm is designed. The supporting equipment of the system adopts a solid organic fertilizer spreader with chain plate and fertilizer baffle to control the amount of fertilizer. The control system is developed based on supervisory control and data acquisition (SCADA), and the human-computer interaction is realized by the touch screen. The basic data of the control system is provided by the actual demand for basic fertilizer in farmland and input into the system through the input box. According to the speed of the vehicle, the momentum BP neural network algorithm is used to first control the opening size of the fertilizer blocking device and provide an input value for the rotating speed control of the fertilizer chain plates. Finally, the elastic BP neural network algorithm is used to control the rotating speed of the fertilizer chain plates. The experimental results show that the control system can change the opening size of the fertilizer blocking device and the speed of the chain plate of the fertilizer spreader in real time according to the set basic fertilizer demand and the traveling speed of the vehicle, and the control deviation of the fertilizer amount is less than 9%.
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Design and experimental verification of conveying device for crushed cornstalks
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Weisong Zhao, Yongsheng Chen, Zhenwei Wang, Biao Ma, Baihe Han, Mingjiang Chen
Journal of Intelligent Agricultural Mechanization (in Chinese and English) 2021, 2 (1): 1-12. DOI:
10.12398/j.issn.2096-7217.2021.01.001
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183
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In this study, considering the poor delivery uniformity, unstable feeding, and easy blockage during the delivery of crushed cornstalks, a straw conveying device was designed. A vibrating plate was combined with a shifting roller, the key structural parameters of which were determined via theoretical analysis.Based on the conveying efficiency and coefficient of variation, the primary factors of operational performance (poking roller speed, eccentric distance, and speed ratio) and the range of values for each factor were obtained via single-factor experiments using a discrete element simulation analysis software,EDEM. The optimal parameter combination was as follows: a poking roller speed of 30 r/min, an eccentric distance of 9 mm, and a speed ratio of 1. Five verification experiments were conducted using this combination.The experimental results indicated satisfactory performance of the conveying device for crushed cornstalk. The conveying efficiency was 37.09 m
3
/h, and the coefficient of variation was 13.77%. The experimental results were consistent with the simulation results, indicating that EDEM software optimization results are feasible and highly accurate.
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