Abstract: At present, rice diseases, insect pests and weeds are still mainly controlled by manpower spray machine in China. However, the shortage of rural labor force is becoming more and more serious. In order to solve this problem, a remote control self propelled boom sprayer was designed. The theoretical analysis and structure design of the steering system of the machine and the spray lance stand unit were carried out, and the steering model and three-dimensional model of the whole machine were established. Articulated steering is adopted in this machine and the four wheels are independently driven by each motor. Driven by steering control algorithm, the machine can steer flexibly with no rotary digging and high efficiency and cause little damage to crops. The steering performance, running performance and climbing ridge performance of the machine were analyzed theoretically. A prototype was manufactured and the feasibility and rationality of the design were verified by field experiments.

Key words: boom sprayer, steering systems, structural design, performance analysis, performance tests