Cooperative Control Strategy of Multi-Component Speed of Distributed Electric Drive Combine Harvester

Highlights Propose a theoretical scheme for the distributed electric drive operation module of the combine harvester to enhance its structural flexibility and harvesting efficiency. Adopting a circular coupling control algorithm to achieve coordinated speed control of various work modules. This control strategy can reduce the energy consumption of the whole machine, improve the quality and efficiency of the combine harvester operation, and has good application prospects. Abstract. To improve the operational efficiency and quality of the combine harvester in the field harvesting process, it is crucial to study the speed collaborative control strategy between the various operational modules of the distributed electric drive combine harvester, which is essential for improving operational efficiency, quality, and system stability. By establishing a mathematical model of the key operating components of the combine harvester, analyzing the operating characteristics of the operating components and the interactions between the components, and based on the multi-motor speed coupled control algorithm, the operating speeds of the components are adjusted in real time to adapt to different operating conditions. A comparative experiment was conducted between the circular coupling control strategy and the traditional parallel control strategy, and the results showed that, compared with traditional parallel control strategies, the electric drive operation module based on the circular coupling control strategy responds within 0.7 s when the feeding amount of the combine harvester suddenly increases by two times. The speed adjustment time of the system is shortened by 58.8%, and the speed of each operation module can maintain a 1:3:5 ratio of operation requirements. The speed synchronization and system stability between operation modules are improved. When the traveling speed of the combine harvester suddenly increases, each working motor based on the circular coupling control strategy can respond within 0.5 seconds, maintaining a speed ratio of 1:3:5. The information between each working module is shared and fed back, which improves the working quality and efficiency of the combine harvester while reducing energy consumption. The research results provide new ideas for improving the operational performance of combine harvesters and further expand the research space for automation and intelligence of combine harvesters. Keywords: Circular coupling control, Combine harvester, Electric drive, Power decoupling, Speed adaptive.