【作者】 张锡阳；

【导师】 张涛； 李庆忠；

【作者基本信息】 中国海洋大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 现场总线技术具有数字化、全分散性、开放性和互操作性等特点,代表了今后工业控制网络发展的方向,是当前自动控制领域中倍受关注的技术之一。本课题致力于研制具有较高可靠性的翻车机卸煤控制系统,在认真分析系统对于输入、输出及控制功能需求的基础上,选用了施耐德的Quantum PLC和PROFIBUS-DP、AS-i总线作为系统的基本硬件平台,以满足翻车机系统对稳定性、可靠性、易用性、扩展性等的要求。本文首先分析比较了几种现场总线的特点;接着着重研究了PROFIBUS-DP和AS-i总线的网络体系结构和通信协议;然后基于实际的调研和用户要求,本课题提出了基于PROFIBUS-DP和AS-i总线技术翻车机控制系统的控制方案,并完成了翻车机系统中PLC控制部分和上位机组态,尤其着重介绍了给料器部分PLC的控制。另外,课题中还将模糊PID控制应用于翻车机控制系统中的双电机同步控制,通过和传统PID控制相比较,模糊PID控制在许多性能指标上都超过了传统的PID控制,在被控对象的数学模型很难确定的情况下,模糊PID控制尤为合适,并通过MATLAB仿真验证了模糊PID控制系统对解决该问题的可行性。通过构建现场总线控制系统方案,充分显示了采用现场总线技术具有信息一体化和控制经济化的优势,无论总体设计、硬件配置、软件设计,具备双向串行多节点数字通讯的现场总线控制系统,相对传统的中央控制系统和集散控制系统,甚至原始的手动操作,都显示出良好的性能和高度的可靠性。更多还原

【Abstract】 Fieldbus technology provides such characteristics as digital, entire scattering, opening and inter-operability, representing the future development direction of the industrial control networks. Currently it has attracted worldwide attentions in the field of automatic control.This paper focuses on the development of an automatic car-dumper control system for unloading coal. Based on the analysis of inputs and outputs of the system and the control requirements, This paper select the Schneider Quantum PLC, Profibus-DP, and the AS-i fieldbus as the hardware platform, thus satisfying the requirements of stability, reliability, maneuverability, and expansibility of the whole system.This dissertation first analyzes and compares the features of several typical Fieldbuses, and then investigates the network architecture and communication protocol of the PROFIBUS-DP and AS-i fieldbus. According to practical user’s requirements, this paper proposed an automatic car-dumper control scheme based on the PROFIBUS-DP and AS-i fieldbus, and accomplished the design of the PLC control of the C/D system and PC configuration, especially for the PLC control of the feeder. In addition, fuzzy PID control is employed for the control of synchronous dual-motor of C/D control system. By comparison with the conventional PID control, it is found that fuzzy PID control outperforms the traditional PID control in many performance indicators. Simulating experiments were carried out on MATLAB platform. The experimental results show that proposed fuzzy PID control is particularly suitable for situations where mathematical model of system is difficult to establish, and the results prove the feasibility of the fuzzy control method.By design and implementation of proposed fieldbus control scheme, it is fully demonstrated that the fieldbus technology has such advantages as integration of information, and economic implementation. Compared with the traditional central control systems and distributed control systems, and even the original manual operation system, the fieldbus control system has exhibited good performance and high reliability in terms of overall design, hardware configuration, software design and two-way serial multi-node digital communication.更多还原