摘要
面向植保机械喷杆位置调节作业的需要,选取电液伺服系统作为其调节装置,提出一种基于模糊控制的控制方法。首先,将电液伺服系统中的未知项、非线性项等进行完整的数学建模;然后,以输出量与给定量的误差及其变化率作为模糊控制器的输入信号,伺服阀的控制电流为输出信号,建立模糊控制系统,实现了对电液伺服系统中不确定项与非线性项的控制;最后,搭建Mat Lab仿真平台进行仿真,同时作为对比设计了PID算法。结果表明:所设计的模糊控制器具有良好的跟踪性能,对系统的不确定性和振动具有良好的控制效果。
In view of the need of adjusting the position of the sprayer of the plant protection machinery,the electro-hydraulic servo system is selected as its regulating device,and a control method based on fuzzy control is proposed. First of all,establish the complete mathematical model based the unknown and nonlinearity of the electro-hydraulic servo system.Then the error between the output and the given amount and its rate of change are regarded as the input signals of the fuzzy controller. The control current of the servo valve is the output signal,and the fuzzy control system is established.The control of uncertain and non-linear items in the electro-hydraulic servo system is realized. Finally,build Mat Lab simulation platform for simulation,at the same time as a contrast designed PID algorithm. The results show that the fuzzy controller designed in this paper has good tracking performance and good control effect on the system's uncertainty and vibration.
引文
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