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提出了一种基于Profibus—DP现场总线通信改造自动化生产线实训装置方案,以S7—300PLC为一级主站,触摸屏TP170B为二级主站,S7—200PLC、变频器MM420、ET200M为从站,介绍了主站PLC与各从站的通信方法。 相似文献
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马春华 《自动化技术与应用》2006,25(10):71-73,86
现场总线的系统位于工业自动化系统中的底层;主要功能是连接现场设备采集站及分散式I-O、传感器、驱动器、执行机构、开关等设备;完成工业现场设备控制及设备间连锁控制;主站工业控制机负责总线通信管理,及其所有从站的通信;现场PLC控制根据实时采集要求,采用总线方式或现场I/O方式,以保征系统具有更好的实时性. 相似文献
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3 应用实例 深圳市自来水集团开天源自动化有限公司在对深圳笔架山水厂泵房自动化工程设计时,考虑到原厂已部分实现车间PLC控制,经过价格及性能分析、比较确定:选用了开放式现场总线CC-Link现场总线产品作为主控设备,控制硬件系统结构图如图5所示。 主站(PLC)备用主站(PLC)从站1#(PLC)从站7#(PLC)变频器远程站(I/O)至厂站…CC-Link 图5 笔架山水厂泵房控制系统硬件结构图 图中,主站控制包括1台送水泵、两台真空泵和1台排水泵,监控与管理整个泵房CC-Link网络的情况,功能包括: ① 远程离线 对操作不正常的远程模块或从站自动让… 相似文献
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AS-i(actuator sensor interface)是执行器-传感器-接口的英文缩写,它是一种用来在控制器(主站)和传感器/执行器(从站)之间双向交换信息的总线网络,属于现场总线下面底层设备级的监控网络系统。AS-i总线系统可通过其主站中的网关与多种现场总线(如FF、Profibus、CANbus等)相连接。AS-i主站可以作为上层现场总线的一个节点服务器,在它下面又可以挂接一批AS-i从站。AS-i总线主要用于具有开关量特征的传感器和执行器系统:传感器可以是各种原理的位 相似文献
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介绍一种EtherCAT实时工业以太网现场总线技术,研究EtherCAT工作原理,通信协议及主、从站实现方法;针对一般工业现场测控需求,利用EtherCAT总线技术,设计基于工控机的主站管理软件和基于FPGA的嵌入式从站软硬件;应用结果表明,该分布式测控系统运行稳定可靠,数据丢失率低,实时性好。 相似文献
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从开发的角度介绍了RS-485/Profibus-DP通信转换器硬件、软件的实现,分析了通信转换器与变频器间的数据交换,以ACS400系列变频器作为从站的控制对象,通过组网通信实验,完成了Profibus-DP现场总线从站通信接口的研制,可以实现模拟主站(PC+IM180+IM181)和从站(变频器)的通信,表明该设备已经实现. 相似文献
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大型地下商场空调系统的计算机控制 总被引:4,自引:0,他引:4
采用位总线和分布式计算机控制技术,成功地实现了大型地下商场空调系统的计算机控制。介绍了多区域空调计算机控制系统的设计原理和工程实现方法,该系统由一个主站和二个从站组咸,主站监督和管理各从站,从站测量和控制温度、湿度、流量。实际运行表明,该系统具有满意的性能和良好的应用前景。 相似文献
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基于TRIO运动控制器的瓦楞纸板横切机控制系统设计 总被引:1,自引:0,他引:1
本论文在分析瓦楞纸板横切机生产工艺的基础上,提出了以TRIO运动控制器+欧姆龙伺服驱动器+触摸屏的交流伺服控制方案。根据切刀的运动规律,研究其轨迹跟踪控制算法,利用TRIO运动控制器的电子凸轮功能,实现了横切机速度同步跟踪和定长剪切功能。实验表明,此控制系统能有效提高横切机的响应速度、剪切精度,并可适用于更高速的瓦楞纸板生产线。 相似文献
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针对伺服系统在低速情况下具有较强的摩擦现象,是一个强非线性系统,本文将模糊控制与PID控制手段结合起来,提出采用非对称模糊PID控制方法,将其引入伺服系统的位置环中,同时建立了基于MATLAB/SIMULINK的系统仿真图。通过仿真试验,验证了非对称模糊PID控制方法具有较好的控制精度和稳定性,该控制方法可使系统的性能有所提高。 相似文献
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位置控制和均衡分配输出控制思想根据轧机HGC位置的实际值与给定值形成一个负反馈,通过比例控制器计算出轧机HGC伺服阀的开口度输出,并将输出分解成主调节量和辅调节量两个分量,由伺服模式控制字选择伺服阀输出其中一个分量,两个伺服阀相互协调以达到均衡分配输出,更好地有效利用伺服阀并保证生产精度的要求。 相似文献
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Sung-Kwun Oh Han-Jong Jang Witold Pedrycz 《Engineering Applications of Artificial Intelligence》2009,22(2):261-271
In this study, we introduce a design methodology for an optimized fuzzy cascade controller for ball and beam system by exploiting the use of hierarchical fair competition-based genetic algorithm (HFCGA). The ball and beam system is a well-known control engineering experimental setup which consists of servo motor, beam and ball and exhibits a number of interesting and challenging properties when considered from the control perspective. The position of ball is determined through the control of a servo motor. The displacement change of the position of ball requires the change of the angle of the beam which determines the position angle of a servo motor. Consequently, the variation of the position of the moving ball and the ensuing change of the angle of the beam results in the change of the position angle of a servo motor. We introduce the fuzzy cascade controller scheme which consists of the outer (1st) controller and the inner (2nd) controller in a cascaded architecture. Auto-tuning of the parameters of the controller (viz. scaling factors) of each fuzzy controller is realized with the use of the HFCGA. The set-point value of the inner controller (the 2nd controller) corresponds to the position angle of a servo motor, and is given as a reference value which enters into the inner controller as the 2nd controller of the two cascaded controllers. HFCGA is a kind of a parallel genetic algorithm (PGA), which helps alleviate an effect of premature convergence being a potential shortcoming present in conventional genetic algorithms (GAs). A detailed comparative analysis carried out from the viewpoint of the performance and the design methodology, is provided for the fuzzy cascade controller and the conventional PD cascade controller whose design relied on the use of the serial genetic algorithms. 相似文献
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Sung-Kwun Oh Han-Jong Jang Witold Pedrycz 《Simulation Modelling Practice and Theory》2011,19(1):181-195
In this study, we develop a design methodology for a fuzzy PD cascade controller for a ball & beam system by using particle swarm optimization (PSO). The ball & beam system is a well-known control engineering experimental setup, which consists of servo motor, beam, and ball. This system exhibits a number of interesting and challenging properties when being considered from the control perspective. The ball & beam system determines the position of ball through the control of a servo motor. The displacement change of the position of ball leads to the change of the angle of the beam which determines the position angle of a servo motor. Consequently the variation of the position of the moving ball and the ensuing change of the angle of the beam results in the change of the position angle of a servo motor. We introduce a fuzzy PD cascade controller scheme which consists of the outer (1st) controller and the inner (2nd) controller arranged in a cascaded architecture. Auto-tuning of the parameters of the controller (scaling factors) as well as fuzzy rules of each fuzzy PD controller is realized with the use of the PSO. Moreover the comparative analysis of results of optimization realized by PSO and GA based on SGA (Serial Genetic Algorithms) is discussed from the viewpoint of control performance. The set-point value of the inner controller (the 2nd controller) corresponds to the position angle of a servo motor, and is given as reference value, which enters into the inner controller as the 2nd controller of the two cascaded controllers. The optimization process takes advantage of a rapid convergence of PSO being used here as a generic search mechanism. A detailed comparative analysis carried out from the viewpoint of the performance and the design methodology, is provided for the fuzzy PD cascade controller and the conventional PD cascade controller whose design exploited serial genetic algorithms. 相似文献
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为了提高伺服系统定位过程中的动态特性和鲁棒性,提出一种新的时间次优滑模控制器的设计方法。首先,借鉴时间最优控制对伺服定位过程中的系统状态进行规划,得到时间最优的位置和速度响应轨迹,从而保证定位的快速性。其次,针对传统时间最优控制鲁棒性差和工程实现较难等问题,根据期望的时间最优状态轨迹设计非线性滑模面,并采用鲁棒趋近律方法设计滑模控制律,实现了伺服定位的鲁棒时间次优控制,仿真结果验证了该方法的有效性。最后,在永磁同步电机伺服控制器开发平台中进行了实验分析,结果表明所提出的控制方法具有很好的动态响应性能和鲁棒 相似文献