Aiming at the problem of poor uniformity of maize sowing caused by ground wheel slip,an electronic control seed-metering system(ECSMS)for maize single seed precision sowing was designed and a mathematical model for mo...Aiming at the problem of poor uniformity of maize sowing caused by ground wheel slip,an electronic control seed-metering system(ECSMS)for maize single seed precision sowing was designed and a mathematical model for motor control of the ECSMS was determined.The PID parameters were set by Z-N method and fuzzy control.The fuzzy PID control design and Simulink simulation were completed by MATLAB,which reduced response time of the system by 0.23 s and improved the control accuracy.Experiments on the JPS-12 test bench show that the qualification index(QI)of maize seed-metering device with the ECSMS increases by 4.47%,the multiples index(MI)decreases by 1.96%,the miss index(MIX)decreases by 2.81%,and the coefficient of variation(CV)of qualified seed spacing decreases by 5.06%,and the sowing uniformity has been greatly improved.Test results of the soil-tank test bench show that the system has good sowing uniformity and stability.And the QI is 96.74%,the MI is 2.15%,the MIX is 1.10%,and the CV of qualified seed spacing is 16.24%.Under different setting seed spacing and different sowing operation speed,the change range of seeding quality index was within 10%.The results of field sowing test show that the QI was 84.21%,the MI was 2.63%,the MIX was 7.89%,and the CV of qualified seed spacing was 22.15%,which meet the requirements of JB/T 10293-2013‘Specification for single seed planters(precision planters)’and the agronomic requirements for maize precision sowing.The system runs stably and reliably in practical operation and has good operation performance.展开更多
介绍了内模控制的发展历史及基本原理,分析了其控制器的设计方法,提出了一种利用Taylor级数展开的基于内模控制(Internal Model control,IMC)的PID控制器参数整定的方法.通过对热交换器PID温度调节闭环控制系统的MATLAB实例仿真,将IMC-...介绍了内模控制的发展历史及基本原理,分析了其控制器的设计方法,提出了一种利用Taylor级数展开的基于内模控制(Internal Model control,IMC)的PID控制器参数整定的方法.通过对热交换器PID温度调节闭环控制系统的MATLAB实例仿真,将IMC-PID整定的效果与传统PID进行对比,论证其控制效果明显优于其它经典PID整定,显示了其实际工程应用价值.展开更多
基金supported by Hebei Agriculture Research System(HBCT2024020205)The State Key Laboratory of North China Crop Improvement and Regulation(Grant No.NCCIR2024ZZ-12)+1 种基金The Sci-Tech Program of Hebei(Grant No.23567601H)The Central Government Guides Local Funds for Scientific and Technological Development(Grant No.236Z7202G).
文摘Aiming at the problem of poor uniformity of maize sowing caused by ground wheel slip,an electronic control seed-metering system(ECSMS)for maize single seed precision sowing was designed and a mathematical model for motor control of the ECSMS was determined.The PID parameters were set by Z-N method and fuzzy control.The fuzzy PID control design and Simulink simulation were completed by MATLAB,which reduced response time of the system by 0.23 s and improved the control accuracy.Experiments on the JPS-12 test bench show that the qualification index(QI)of maize seed-metering device with the ECSMS increases by 4.47%,the multiples index(MI)decreases by 1.96%,the miss index(MIX)decreases by 2.81%,and the coefficient of variation(CV)of qualified seed spacing decreases by 5.06%,and the sowing uniformity has been greatly improved.Test results of the soil-tank test bench show that the system has good sowing uniformity and stability.And the QI is 96.74%,the MI is 2.15%,the MIX is 1.10%,and the CV of qualified seed spacing is 16.24%.Under different setting seed spacing and different sowing operation speed,the change range of seeding quality index was within 10%.The results of field sowing test show that the QI was 84.21%,the MI was 2.63%,the MIX was 7.89%,and the CV of qualified seed spacing was 22.15%,which meet the requirements of JB/T 10293-2013‘Specification for single seed planters(precision planters)’and the agronomic requirements for maize precision sowing.The system runs stably and reliably in practical operation and has good operation performance.
文摘介绍了内模控制的发展历史及基本原理,分析了其控制器的设计方法,提出了一种利用Taylor级数展开的基于内模控制(Internal Model control,IMC)的PID控制器参数整定的方法.通过对热交换器PID温度调节闭环控制系统的MATLAB实例仿真,将IMC-PID整定的效果与传统PID进行对比,论证其控制效果明显优于其它经典PID整定,显示了其实际工程应用价值.
