Design and Experiment of Self-propelled Hybrid Broussonetia papyrifera Harvester

Cutting characteristics of lower branches of hybrid Broussonetia papyrifera were tested．Shear strength of its xylem was measured to be about（4.98±0.52） MPa, and shear strength of its phloem reached（15.99±4.47）MPa．Dynamic process of cutting hybrid Broussonetia papyrifera stems with a simulated saw blade based on ANSYS/LS-DYNA was studied, and theoretical optimal cutting line speed has been determined to be 60 m/s at a walking speed of 3 km/h to 5 km/h．A dual disk saw cutting table suitable for low loss stubble leveling of hybrid Broussonetia papyrifera with a working cutting pair of 2 meters was developed．In order to solve problem of uneven feeding load caused by uneven biomass of hybrid Broussonetia papyrifera, an automatic feeding load monitoring and walking speed matching control system and an intelligent control device were designed and developed．Through field experiments and performance tests, self-propelled hybrid Broussonetia papyrifera harvester developed could meet requirements of adaptive control of operating speed based on feed load and low loss flat stubble harvesting．