摘要
NetLinxTM开放式网络架构是罗克韦尔自动化采用开放的联网技术、实现从车间层到顶层无缝集成的解决方案。NetLinx架构的三层网络--Ethernet/IP、ControlNet和DeviceNet采用统一的通用工业协议(Common Industrial Protocol, CIPTM),提供相同的完整网络通信功能,能够让用户在任何NetLinx架构网络上方便地实时控制、系统组态和数据采集。目前,工业控制系统正在向集成化、网络化、开放性发展,因此研究基于网络环境的控制系统具有重要的现实意义。
论文首先对NetLinxTM开放式网络架构进行了深入分析,在此基础上结合电梯模型和过程控制实验装置设计了基于三层网络的电梯群控和过程控制实验平台。基于Ethernet/IP和ControlNet的电梯群控实验平台由ControlLogix控制器、FLEX I/O、160SSC变频器和四台电梯模型组成,能够实现电梯群调度算法的研究;基于Ethernet/IP和DeviceNet的过程控制实验平台由CompactLogix控制器、FLEX I/O、Power FLEX40变频器和过程控制实验装置组成,能够采集温度、压力、液位和流量等参数,并对其实施控制。
论文基于电梯群控实验平台重点研究了电梯群最小等待时间调度算法,应用罗克韦尔软件RSLogix5000和RSView32进行了电梯群最小等待时间调度算法的实现和监控;并对多目标电梯群的智能控制进行了研究,分析了电梯群控系统的多目标性,建立了评.价函数,研究了基于模糊控制的交通模式识别和各特征值加权系数的确定,并对算法进行了仿真分析,验证了算法的有效性。
The opening network architecture of NetLinxTM, which is proposed by Rockwell Automation, is a solution of seamless integrated from the workshop level to the top layer using networking technology. The three-tier networks of NetLinx--Ethernet/IP、ControlNet and Device Net apply unified industry agreement(Common Industrial Protocol, CIPTM), and support the same complete network service function. The network also makes users controlling real-time system, configuring the system and acquiring the data more convenient Nowadays, the development of industrial control system is moving to integration, network, open-style system, so it is very important in researching and designing of web-based platform.
First, the opening network architecture of NetLinxTM is thoroughly analyzed in this paper, based on this, combine with the elevator models and the process control experimental device, the elevators group control system and process control experimental platform are designed based the three-tier networks. The Ethernet/IP and the ControlNet based of the elevators group control experimental platform, which is composed of ControlLogix、FLEX I/O、160SSC Transducer and four of elevator models, can provide the study environment for elevators group control system of attemper arithmetic; The Ethernet/IP and the DeviceNet based of the process control experimental platform, which is composed of CompactLogix、FLEX I/O、Power FLEX40 Transducer and the process control experimental device, can be collected temperature、pressure、liquid level、flow and other parameters from it, and implemented control to them.
The smallest waiting time algorithm of the elevators group control system is studied with emphasis in the paper, the control and monitor of this algorithm are achieved by using Rockwell RSLogix5000 and RSView32 softwares; Meanwhile, the intelligent control of the multi-objective elevator group is studied, the multi-objectives of the elevator group control system is analyze, the evaluation function is establish, the recognition of traffic pattern and identification of the weighted value of the characteristic coefficient based on the fuzzy control theories is study, and carry on the simulation and analysis of the algorithm in the paper, which verify the effectiveness of the algorithm.
引文
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