玉米定向种子带恒张力卷绕系统自适应模糊PID控制

在玉米定向种子带的卷绕过程中,种子带的张力控制影响到种子带的质量。为此依据玉米定向种子带的要求,建立恒张力卷绕系统的传递函数,利用模糊控制技术实现玉米种子带的恒张力卷绕控制,创建了模糊自适应PID控制器,利用Matlab对其进行仿真,得到了较为合理的模糊控制算法,并将模糊控制算法通过西门子S7-200型PLC为核心的硬件控制电路应用于实际的张力控制,并进行了实际的卷绕试验。试验结果表明:模糊PID控制器与传统PID控制器相比,具有更好的动态稳定性和跟踪性能,张力产生阶跃时,系统过渡时间约为2 s,超调量在1.2%内,能够较好地满足种子带的卷绕要求。

Constant Tension Winding System of Corn Directional Belt Making Machine Based on Self-adaptive Fuzzy PID Control

In the processing and winding process of corn directional belt making, tension control determines the quality of corn directional belt. A corn seed directional belt making machine was developed and transfer functions of constant tension winding system were set up. The fuzzy PID self-adaptive control technology was used to achieve constant tension winding in corn directional belt making and a fuzzy PID self-adaptive controller was created. Finally, the software Matlab was used to simulate. As a result, reasonable fuzzy PID self-adaptive control algorithm was obtained, and fuzzy PID self-adaptive control algorithm was used in the actual tension control by using Siemens S7-200 PLC core hardware control circuit, as well as the winding experiment was carried out. Test results showed that the fuzzy PID self-adaptive had better dynamic stability and tracking performance compared to the conventional PID controller and the controller could meet the requirements of corn directional belt winding. When the tension generated step, system transition time was about 2s and overshoot was in 1.2%.