基于模糊内模的肥料包装机称量控制系统设计  

Design of Weighing Control System of Fertilizer Packing Machine Based on Fuzzy Inner Mould

作　　者：罗启平[1] 李婷[1] LUO Qi-ping;LI Ting(Guangxi Technological College of Machinery and Electricity,Nanning 530007,China)

机构地区：[1]广西机电职业技术学院,南宁530007

出　　处：《包装工程》2020年第21期219-223,共5页Packaging Engineering

基　　金：广西高校中青年教师基础能力提升项目(KY2016YB647)。

摘　　要：目的为提高肥料包装计量精度,设计一种肥料包装机控制系统。方法建立肥料动态称量系统数学模型。结合模糊控制和内模控制理论的先进控制算法,设计肥料包装计量精度控制系统。采用内模控制使PID控制器参数简化,同时模糊控制的引入实现了控制参数的在线调整。利用肥料质量偏差及其变化率,基于Mamdan二维模糊控制器实现内膜控制参数λ的自动调整。结果实验结果表明,在模糊内模PID控制下,质量最大相对误差为1%;质量绝对误差的平均值为0.2kg;控制算法超调量较小、具有很好的动静态性能;系统称量误差大幅度减小。结论所述控制方法和系统可以提高称量包装设备的效率和精度。The paper aims to design a control system of fertilizer packaging machine to improve the precision of fertilizer packaging measurement.The mathematical model of dynamic weighing system of fertilizer was established.Combined with the advanced control algorithm of fuzzy control and internal model control theory,the precision control system of fertilizer packaging measurement was designed.The internal mode control was adopted to simplify the PID controller parameters,and the introduction of fuzzy control realized the on-line adjustment of controller parameters.Based on Mamdan two-dimensional fuzzy controller,fertilizer weight deviation and its change rate were used to realize automatic adjustment of internal model control parameters.The experimental results showed that the maximum relative error of weight was 1%under the control of fuzzy internal model PID.The average absolute error of weight was 0.2 kg.The control algorithm had small overshoot and good dynamic and static performance.The system weighing error was greatly reduced.The control method and system described can improve the efficiency and accuracy of weighing packaging equipment.

关 键 词：肥料包装机 称量 内模控制 模糊控制 

分 类 号：TB486[一般工业技术—包装工程]