基于响应曲面法的移动式棉秆拔取力测试装置设计及试验研究

Design and experimental research of mobile cotton stalk pulling resistance test device based on response surface method

针对目前我国棉秆资源利用率低下,棉秆回收机械急需深入发展等问题,设计一种移动式棉秆拔取力学参数性能测定装置。以起拔阻力F作为响应指标,基于响应曲面分析法,利用Design Expert软件设计三因素三水平试验,选取起拔角度、机具前进速度、土壤含水率为影响因素,建立响应面三维模型,得出:棉秆起拔角度、土壤含水率、前进速度的p-vaule分别为0.0016、0.0064、0.0023都小于0.05。各试验因素对棉秆起拔力影响显著顺序为起拔角度>前进速度>土壤含水率。大田试验结果表明棉秆测力装置最佳的起拔条件:前进速度为1.0 m/s,土壤含水率17.86%,棉秆起拔角度30.03°,平均起拔力为343.764 N,误差小于5%,该装置为棉花秸秆收获机械的研究提供依据及实验参考。

In view of the current low utilization rate of cotton stalk resources in China,cotton stalk recycling machinery urgently needs in-depth development and other issues.This paper designed a mobile mechanical parameter performance measurement device for cotton stalk extraction.Taking the pull-out resistance F as the response index,the three-factor three-level test was designed using Design Expert software based on the response surface analysis method.The test selected pull-out angle,machine speed,and soil moisture content as the influencing factors to establish a three-dimensional model of the response surface.It is concluded that the p-value of cotton stalk lifting angle,soil moisture content,and advancing speed are 0.0016,0.0064,and 0.0023,respectively,which are less than 0.05.The effect of each test factor on the pulling force of cotton stalks is in descending order of pulling angle,advancing speed,soil moisture content.The field test results show that the best lifting conditions of the cotton stalk force measuring device:the forward speed 1.0 m/s,the soil moisture content is 17.86%,the cotton stalk lifting angle is 30.03°,the average pulling force is 343.764 N,the error is less than 5%.The device provides a basis and experimental reference for the research of cotton straw harvesting machinery.