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为改变传统的手工收割人工灌木林费时费力的现状,设计了一台履带式割灌机来替代人工劳作。通过对传统的小型自走式灌木割灌机前进时候的行进速度与刀具的切削速度之间的协调关系分析,发现该割灌机在对灌木丛进行收割作业时,传动系统为非连续性函数输出,因此无法得到切削速度与行进速度的最佳协调。为满足提高小型履带式灌木人工林割灌机工作效率的需求,对割灌机的传动系统在传统经验设计的基础上进行优化设计。通过确定传动系统的目标函数,选择独立的设计变量,确定约束条件将传动系统的数学模型建立出来,对设计变量、目标函数以及边界约束条件进行分析和优化,编制了MATLAB复合形法的优化设计程序,并利用其强大的优化计算能力对割灌机的传动系统进行了优化设计。优化结果比按照传统设计得到的小型履带式人工灌木割灌机的工作效率提高了20.59%。为提高割灌机的收割作业效率提供了优化设计方法和理论依据。
In order to change the time-consuming and labor-consuming situation of traditional manual shrub harvesting, a caterpillar brush cutter was designed to replace manual labor. Through the analysis of the coordination relationship between the traveling speed of the traditional small self-propelled bush brushing machine and the cutting speed of the cutting tool, it is found that the brush cutter is a discontinuous function Output, and therefore can not get the best coordination between cutting speed and running speed. In order to meet the need of improving the working efficiency of small caterpillar bush cutters, the transmission system of brush cutter was optimized based on the traditional experience design. By determining the objective function of the transmission system, selecting independent design variables, determining the constraints and establishing the mathematical model of the transmission system, the design variables, objective functions and boundary constraints are analyzed and optimized, and the optimal design of MATLAB complex method Program, and using its powerful ability to optimize the calculation of the brush cutter drive system has been optimized. The optimization result is 20.59% more efficient than that of a small caterpillar bush shrubber designed according to the traditional design. In order to improve the efficiency of crop cutting machine harvesting provides an optimized design method and theoretical basis.