由于DCS控制器中电表传感器在计量检测过程中,传统的B-MAC-DCS协议能耗和丢包率较高,无法缓解汇聚节点的漏斗效应,导致在远程抄表过程中传感器计量误差增大。提出一种机械电表接触传感器计量误差检测方法。采用小波基函数对DCS控制器中...由于DCS控制器中电表传感器在计量检测过程中,传统的B-MAC-DCS协议能耗和丢包率较高,无法缓解汇聚节点的漏斗效应,导致在远程抄表过程中传感器计量误差增大。提出一种机械电表接触传感器计量误差检测方法。采用小波基函数对DCS控制器中的接触传感器计量数据抗干扰处理,并通过动态选取阈值的方法,对经过小波变换后的数据去除噪声。使用低功耗自适应集簇分层型(low energy adaptive clustering hierarchy,LEACH)协议分簇代替传统的B-MAC协议;根据簇内监测值,引入阈值分析方法获取传感器计量指标,并将其作为判定依据进行误差检测,根据计量指标的变化情况判断是否存在计量误差。实验结果表明,所提方法可以准确且有效检测出机械电表接触传感器计量误差,解决DCS中机械电表的运行隐患问题。展开更多
There are issues with flexible DC transmission system such as a lack of control freedom over power flow.In order to tackle these issues,a DC power flow controller(DCPFC)is incorporated into a multi-terminal,flexible D...There are issues with flexible DC transmission system such as a lack of control freedom over power flow.In order to tackle these issues,a DC power flow controller(DCPFC)is incorporated into a multi-terminal,flexible DC power grid.In recent years,a multi-port DC power flow controller based on a modular multi-level converter has become a focal point of research due to its simple structure and robust scalability.This work proposes a model predictive control(MPC)strategy for multi-port interline DC power flow controllers in order to improve their steady-state dynamic performance.Initially,the mathematical model of a multi-terminal DC power grid with a multi-port interline DC power flow controller is developed,and the relationship between each regulated variable and control variable is determined;The power flow controller is then discretized,and the cost function and weight factor are built with numerous control objectives.Sub module sorting method and nearest level approximation modulation regulate the power flow controller;Lastly,theMATLAB/Simulink simulation platformis used to verify the correctness of the establishedmathematicalmodel and the control performance of the suggestedMPC strategy.Finally,it is demonstrated that the control strategy possesses the benefits of robust dynamic performance,multiobjective control,and a simple structure.展开更多
An improved single-neuron proportional integral derivative （ PID ） controller and a new method to build the DC motor system were presented in the article. In the simulation, the robot arm is considered as an externa...An improved single-neuron proportional integral derivative （ PID ） controller and a new method to build the DC motor system were presented in the article. In the simulation, the robot arm is considered as an external load to DC motor. Both the motor module and the load module are crea- ted in Simulink to achieve simulation results closer to real robot system. In this way, it can well veri- fy the performance of the improved single-neuron PID controller, which is a combined controller of normal PID controller and single-neuron PID controller. Besides, an intelligent switcher can help to realize the function of choosing a better control algorithm according to motor＇ s velocity output. Sim- ulated results confirm the rapid and stable response of the improved PID controller. Moreover, the improved single-neuron PID controller has an excellent ability to overcome the load impact and su- press the jamming signals. At last, a GUI interface platform is built to make the controller easier to be applied in other robot systems.展开更多
新时期,火电厂的工作内容比较复杂,需要借助分散控制系统(Distributed Control System,DCS)提供控制方面的支持,这也要求加强DCS故障处理和预防工作。首先,分析火电厂DCS常见故障;其次,分析其应急处理方法及预防策略,分别就共性处理原...新时期,火电厂的工作内容比较复杂,需要借助分散控制系统(Distributed Control System,DCS)提供控制方面的支持,这也要求加强DCS故障处理和预防工作。首先,分析火电厂DCS常见故障;其次,分析其应急处理方法及预防策略,分别就共性处理原则和硬件故障应急处理方法,以及建设故障感知模式、运用大数据组织预防等进行具体论述,呈现火电厂DCS故障特点的同时,为后续处理和预防活动提供必要参考。展开更多
A new kind of dynamic neural network--diagonal recurrent neural network (DRNN) and its learning method and architecture are presented. A direct adaptive control scheme is also developed that is applied to a DC (Direct...A new kind of dynamic neural network--diagonal recurrent neural network (DRNN) and its learning method and architecture are presented. A direct adaptive control scheme is also developed that is applied to a DC (Direct Current) speed control system with the ability to auto-tune PI (Proportion Integral) parameters based on combining DRNN with PI controller. The simulation results of DRNN show better control performances and potential practical use in comparison with PI controller.展开更多
分布式控制系统(Distributed Control System,DCS)是以计算机通讯技术为基础,在工业自动化领域发挥重要作用。本文旨在探讨DCS在工业自动化中的广泛应用,分析其显著优势和特点,并辅以不同行业中的具体应用案例。通过实例,阐述了DCS在石...分布式控制系统(Distributed Control System,DCS)是以计算机通讯技术为基础,在工业自动化领域发挥重要作用。本文旨在探讨DCS在工业自动化中的广泛应用,分析其显著优势和特点,并辅以不同行业中的具体应用案例。通过实例,阐述了DCS在石化、电力和制造等工业领域的实际应用,证明了它在提高生产效率、保证操作安全和提高系统灵活性等方面的巨大作用。展开更多
随着工业自动控制行业的快速发展,对DCS(Distributed Control System)控制系统应用的新需求不断提出。为了适应DCS控制系统的高可靠、智能化、开放性的需求,本文通过应用工业以太网技术,结合以太网的带宽资源,提出了一种新型DCS系统控...随着工业自动控制行业的快速发展,对DCS(Distributed Control System)控制系统应用的新需求不断提出。为了适应DCS控制系统的高可靠、智能化、开放性的需求,本文通过应用工业以太网技术,结合以太网的带宽资源,提出了一种新型DCS系统控制站硬件架构设计。该设计打破了传统DCS控制现场总线的瓶颈,实现了自主研发DCS控制系统高速传输,高实时性、高开放性,并具有灵活拓展的DCS控制站新的硬件拓扑结构。展开更多
文摘由于DCS控制器中电表传感器在计量检测过程中,传统的B-MAC-DCS协议能耗和丢包率较高,无法缓解汇聚节点的漏斗效应,导致在远程抄表过程中传感器计量误差增大。提出一种机械电表接触传感器计量误差检测方法。采用小波基函数对DCS控制器中的接触传感器计量数据抗干扰处理,并通过动态选取阈值的方法,对经过小波变换后的数据去除噪声。使用低功耗自适应集簇分层型(low energy adaptive clustering hierarchy,LEACH)协议分簇代替传统的B-MAC协议;根据簇内监测值,引入阈值分析方法获取传感器计量指标,并将其作为判定依据进行误差检测,根据计量指标的变化情况判断是否存在计量误差。实验结果表明,所提方法可以准确且有效检测出机械电表接触传感器计量误差,解决DCS中机械电表的运行隐患问题。
基金funded by National Natural Science Foundation of China (52177074).
文摘There are issues with flexible DC transmission system such as a lack of control freedom over power flow.In order to tackle these issues,a DC power flow controller(DCPFC)is incorporated into a multi-terminal,flexible DC power grid.In recent years,a multi-port DC power flow controller based on a modular multi-level converter has become a focal point of research due to its simple structure and robust scalability.This work proposes a model predictive control(MPC)strategy for multi-port interline DC power flow controllers in order to improve their steady-state dynamic performance.Initially,the mathematical model of a multi-terminal DC power grid with a multi-port interline DC power flow controller is developed,and the relationship between each regulated variable and control variable is determined;The power flow controller is then discretized,and the cost function and weight factor are built with numerous control objectives.Sub module sorting method and nearest level approximation modulation regulate the power flow controller;Lastly,theMATLAB/Simulink simulation platformis used to verify the correctness of the establishedmathematicalmodel and the control performance of the suggestedMPC strategy.Finally,it is demonstrated that the control strategy possesses the benefits of robust dynamic performance,multiobjective control,and a simple structure.
文摘An improved single-neuron proportional integral derivative （ PID ） controller and a new method to build the DC motor system were presented in the article. In the simulation, the robot arm is considered as an external load to DC motor. Both the motor module and the load module are crea- ted in Simulink to achieve simulation results closer to real robot system. In this way, it can well veri- fy the performance of the improved single-neuron PID controller, which is a combined controller of normal PID controller and single-neuron PID controller. Besides, an intelligent switcher can help to realize the function of choosing a better control algorithm according to motor＇ s velocity output. Sim- ulated results confirm the rapid and stable response of the improved PID controller. Moreover, the improved single-neuron PID controller has an excellent ability to overcome the load impact and su- press the jamming signals. At last, a GUI interface platform is built to make the controller easier to be applied in other robot systems.
文摘新时期,火电厂的工作内容比较复杂,需要借助分散控制系统(Distributed Control System,DCS)提供控制方面的支持,这也要求加强DCS故障处理和预防工作。首先,分析火电厂DCS常见故障;其次,分析其应急处理方法及预防策略,分别就共性处理原则和硬件故障应急处理方法,以及建设故障感知模式、运用大数据组织预防等进行具体论述,呈现火电厂DCS故障特点的同时,为后续处理和预防活动提供必要参考。
文摘A new kind of dynamic neural network--diagonal recurrent neural network (DRNN) and its learning method and architecture are presented. A direct adaptive control scheme is also developed that is applied to a DC (Direct Current) speed control system with the ability to auto-tune PI (Proportion Integral) parameters based on combining DRNN with PI controller. The simulation results of DRNN show better control performances and potential practical use in comparison with PI controller.
文摘分布式控制系统(Distributed Control System,DCS)是以计算机通讯技术为基础,在工业自动化领域发挥重要作用。本文旨在探讨DCS在工业自动化中的广泛应用,分析其显著优势和特点,并辅以不同行业中的具体应用案例。通过实例,阐述了DCS在石化、电力和制造等工业领域的实际应用,证明了它在提高生产效率、保证操作安全和提高系统灵活性等方面的巨大作用。
文摘随着工业自动控制行业的快速发展,对DCS(Distributed Control System)控制系统应用的新需求不断提出。为了适应DCS控制系统的高可靠、智能化、开放性的需求,本文通过应用工业以太网技术,结合以太网的带宽资源,提出了一种新型DCS系统控制站硬件架构设计。该设计打破了传统DCS控制现场总线的瓶颈,实现了自主研发DCS控制系统高速传输,高实时性、高开放性,并具有灵活拓展的DCS控制站新的硬件拓扑结构。
