一种新型浮力称重式动态计量自适应模糊控制器设计

Design of a New Buoyancy Weighing Dynamic Measurement Adaptive Fuzzy Controller

为了解决传统新型浮力称重式动态计量控制系统自适应能力较差、无法为变化的瞬时给物量提供准确的动态计量服务的问题,设计了一种新型浮力称重式动态计量自适应模糊控制器。分析了新型浮力称重原理,确定物质质量,以计算浮力称重瞬时给物量。通过输入阶段、模糊化阶段、模糊推理阶段和输出阶段实现新型浮力称重式动态计量自适应模糊控制器设计,将浮力称重偏差和偏差改变率作为输入,不同阶段通过隶属度函数相关联。依据浮力称重瞬时给物量,将整体误差及其变化率当成输入,建立模糊规则表,完成模糊推理,输出控制电压,控制新型浮力称重电机自适应加料或减料。结果表明:所设计控制器响应速度快,稳定性较高,在快速、中速与慢速给料过程中大部分处于稳定阶段,称量结果准确;经现场测试,设计控制器控制误差最低。可见设计控制器控制精度高,可达到实际应用要求。

In order to solve the problem that the adaptive ability of the traditional new buoyancy weighing dynamic metering control system is poor and it can not provide accurate dynamic metering service for changing instantaneous quantity,a new type of buoyancy weighing dynamic metering adaptive fuzzy controller was designed. The principle of new buoyancy weighing was analyzed,and the mass of material was determined to calculate the instantaneous feed of buoyancy weighing. A new type of buoyancy weighing dynamic measurement adaptive fuzzy controller was designed through the input stage,the fuzzification stage,the fuzzy reasoning stage and the output stage. The deviation and the deviation change rate of buoyancy weighing were taken as input,and the membership function was used to correlate the different stages. According to the instantaneous feeding quantity of buoyancy weighing,the whole error and its change rate were taken as input,the fuzzy rule table was established,the fuzzy reasoning was completed,the control voltage was output,and the self-use feeding or reducing of the new type of buoyancy weighing motor was controlled. The results show that the designed controller has fast response speed and high stability,most of which are in the stable stage in the process of fast,medium and slow feeding,and the weighing results are accurate. The control error of the designed controller is the lowest through field test. It can be seen that the control precision of the designed controller is high,and it can meet the requirements of practical application.