Study on height Control of Corn harvester in Hilly and mountainous area

The cutting table of corn harvester in hilly and mountainous areas can't be automatically adjusted to the complex terrain, which makes the level of corn harvest in hilly and mountainous areas on the low level. In order to solve this problem, the height control system of cutting table of corn harvester in hilly and mountainous area is studied in this paper. A height control framework of cutting table is proposed based on inclination sensor to test the angle of terrain changing and the adjusting angle of cutting table, which is based on the hydraulic dynamic model of harvester. Furthermore, the estimative method of ground slope is obtained, and three kinds of cutting table height control algorithms with different detection angle ranges of the system are designed. Finally, Simulation analysis and experimental verification are done. The results show that the simulation test time of the cutting table height reach to adjusting balance position is 0.8s and the actual test time is 1s on the upper 10°, and the simulation test time of the cutting table height reach to the adjusting balance position is 0.5s and the actual test time is 0.6s on the upper 5°. The maximum error of cutting table height control of corn harvester is less than 20%, which adapts to the changing working conditions in hilly and mountainous areas and meets the design requirements. It meets the needs of harvest and improves the degree of automation of corn harvesting in hilly and mountainous areas.