基于模糊PID控制的粉末包装计量控制系统

目的针对粉末包装计量控制系统中由于粉末的流量与螺杆的转速存在着一定非线性的特点,提出一种基于模糊PID的粉末计量包装控制系统。方法该粉末包装计量控制系统由螺杆计量机构、称重机构和信号采集处理单元等组成,根据系统特性,结合模糊逻辑构建模糊自适应调整机构对PID控制器参数进行在线调整,以适应系统特性的非线性变化,并基于Matlab对控制系统进行仿真。结果样机计量控制时偏差度最大为0.8%,仿真结果表明模糊PID较传统PID具有更好的效果。结论该控制系统实际控制工作稳定,鲁棒性较好,可以满足实际控制系统的需要。

Powder Packaging Metering Control System Based on Fuzzy PID Control

The work aims to propose a power metering and packaging control system based on fuzzy PID, regarding the non-linear characteristics of the powder flow rate and the screw speed in such system. The powder packaging metering control system consisted of screw metering mechanism, weighing mechanism and signal acquisition and processing unit, etc. According to the system characteristics and combined with the fuzzy logic, the fuzzy adaptive adjustment mechanism was established to adjust the PID controller parameters online, so as to adapt to the non-linear change in the system characteristics. Based on Matlab, the control system was simulated. The maximum deviation was 0.8% in the process of prototype metering control. The simulation results showed that the fuzzy PID had better effects than the traditional PID. The actual control of the control system is stable and robust, and can meet the needs of the actual control system.