智能全自動稱重包裝系統(tǒng)控制研究
發(fā)布時間：2019-05-06 07:30
【摘要】：智能全自動稱重包裝系統(tǒng)是現(xiàn)代化工業(yè)的產物,廣泛應用于農業(yè)、化工、食品等行業(yè),可以十分有效地為這些行業(yè)提高勞動生產率、降低消耗。 一個完整的自動稱重包裝控制系統(tǒng)是由幾個子系統(tǒng)所組成的,本文從實際工程出發(fā),研究分析了整個系統(tǒng)以及各子系統(tǒng)組成及工作原理。重點研究了稱重控制子系統(tǒng)和熱合控制子系統(tǒng)并進行設計分析。 由于動態(tài)稱重系統(tǒng)是一個非線性、時變、滯后的系統(tǒng),在控制算法方面,常規(guī)PID控制不能達到理想的控制效果,根據物料的下落過程,針對兩級下料過程,設計了模糊神經網絡PID控制策略,通過仿真分析,表明了該控制算法具有很大優(yōu)越性,基于本課題選用PLC作稱重控制器,另外根據實際下料系統(tǒng)模型設計了基于PLC控制的分段PID控制策略。仿真與實驗結果表明：分段PID控制策略對動態(tài)稱重控制效果良好。 熱合控制系統(tǒng)也是系統(tǒng)中尤為重要的部分,本文對該子系統(tǒng)進行了工作原理流程分析,其核心是盡量使加熱管裝置處于恒溫狀態(tài),或產生小范圍的溫度波動,為了實現(xiàn)這一要求,研究了固態(tài)繼電器以及可控硅觸發(fā)電路的性能,選擇觸發(fā)更為優(yōu)越的可控硅觸發(fā)方式,提出并設計了基于模糊PID控制策略的溫度控制器,仿真和實驗證明本控制策略實現(xiàn)了系統(tǒng)控制要求。設計完成PLC程序及人機交互界面等并且投入實際生產工藝中。 本文還進行了稱重控制、熱合控制子系統(tǒng)的調試,以及對整體系統(tǒng)在實驗室進行聯(lián)調。在LabVIEW虛擬儀器軟件的基礎上,以及數(shù)據采集系統(tǒng)的方法,設計了上位機遠程監(jiān)控系統(tǒng),此監(jiān)控系統(tǒng)對系統(tǒng)實現(xiàn)實時數(shù)據監(jiān)測、報警控制等,其界面友好,操作簡易,提高了系統(tǒng)的性能效率,實現(xiàn)了遠程計算機通過網絡監(jiān)控實際運行系統(tǒng)。
[Abstract]:Intelligent automatic weighing packaging system is the product of modern industry. It is widely used in agriculture, chemical industry, food and other industries. It can effectively improve labor productivity and reduce consumption for these industries. A complete automatic weighing package control system is composed of several subsystems. In this paper, the whole system, the composition and working principle of each subsystem are studied and analyzed from the practical project. The weighing control subsystem and thermal control subsystem are studied and analyzed. Because the dynamic weighing system is a nonlinear, time-varying and time-delay system, the conventional PID control can not achieve the ideal control effect in terms of the control algorithm. According to the falling process of the material, the two-stage unloading process is aimed at. The fuzzy neural network PID control strategy is designed, and the simulation analysis shows that the control algorithm has great advantages. Based on this subject, PLC is chosen as the weighing controller. In addition, a piecewise PID control strategy based on PLC control is designed according to the actual cutting system model. The simulation and experimental results show that the piecewise PID control strategy has a good effect on dynamic weighing control. The thermal control system is also an important part of the system. The working principle and flow chart of the subsystem are analyzed in this paper. The core of the system is to keep the heating tube in the constant temperature state as far as possible, or to produce a small range of temperature fluctuations. In order to achieve this requirement, the performance of solid-state relay and thyristor trigger circuit is studied, and the better trigger mode is chosen. A temperature controller based on fuzzy PID control strategy is proposed and designed. Simulation and experiments show that the control strategy realizes the system control requirements. Design and complete the PLC program and human-computer interface and put into the actual production process. This paper also carries on the weighing control, the thermal control subsystem debugging, and carries on the joint adjustment to the whole system in the laboratory. On the basis of LabVIEW virtual instrument software and the method of data acquisition system, the remote monitoring system of upper computer is designed. The monitoring system realizes real-time data monitoring, alarm control and so on. The interface is friendly and the operation is simple. It improves the performance and efficiency of the system and realizes the remote computer monitoring the actual running system through the network.
【學位授予單位】：揚州大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TB486.3
本文編號：2469992
[Abstract]:Intelligent automatic weighing packaging system is the product of modern industry. It is widely used in agriculture, chemical industry, food and other industries. It can effectively improve labor productivity and reduce consumption for these industries. A complete automatic weighing package control system is composed of several subsystems. In this paper, the whole system, the composition and working principle of each subsystem are studied and analyzed from the practical project. The weighing control subsystem and thermal control subsystem are studied and analyzed. Because the dynamic weighing system is a nonlinear, time-varying and time-delay system, the conventional PID control can not achieve the ideal control effect in terms of the control algorithm. According to the falling process of the material, the two-stage unloading process is aimed at. The fuzzy neural network PID control strategy is designed, and the simulation analysis shows that the control algorithm has great advantages. Based on this subject, PLC is chosen as the weighing controller. In addition, a piecewise PID control strategy based on PLC control is designed according to the actual cutting system model. The simulation and experimental results show that the piecewise PID control strategy has a good effect on dynamic weighing control. The thermal control system is also an important part of the system. The working principle and flow chart of the subsystem are analyzed in this paper. The core of the system is to keep the heating tube in the constant temperature state as far as possible, or to produce a small range of temperature fluctuations. In order to achieve this requirement, the performance of solid-state relay and thyristor trigger circuit is studied, and the better trigger mode is chosen. A temperature controller based on fuzzy PID control strategy is proposed and designed. Simulation and experiments show that the control strategy realizes the system control requirements. Design and complete the PLC program and human-computer interface and put into the actual production process. This paper also carries on the weighing control, the thermal control subsystem debugging, and carries on the joint adjustment to the whole system in the laboratory. On the basis of LabVIEW virtual instrument software and the method of data acquisition system, the remote monitoring system of upper computer is designed. The monitoring system realizes real-time data monitoring, alarm control and so on. The interface is friendly and the operation is simple. It improves the performance and efficiency of the system and realizes the remote computer monitoring the actual running system through the network.
【學位授予單位】：揚州大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TB486.3
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