共查询到20条相似文献，搜索用时 124 毫秒
1.
基于DCS的锅炉自动控制系统 总被引：1，自引：0，他引：1
介绍了以组态软件为上位机监控系统和以PLC为核心的下位机的锅炉集散控制系统的实现方案,简述了DCS锅炉控制系统的硬件配置及其功能的软件实现,燃烧控制系统、汽包水位控制系统及流量控制系统的主要特点和控制流程.实践证明,该系统达到了锅炉燃烧节能降耗的工艺要求,且运行稳定可靠. 相似文献
2.
基于DCS的燃气热处理炉自动控制系统 总被引：1，自引：0，他引：1
介绍了基于DCS的燃气热处理炉控制系统的硬件配置及其功能的软件实现,介绍了燃烧控制系统,温度控制系统及流量控制系统等的主要特点和控制流程。实践证明,该系统达到了锅炉燃烧工况良好、节能降耗的工艺要求,且运行稳定可靠。 相似文献
3.
结合我厂新建的7#锅炉,采用和利时公司开发研制的以MACSV为组态软件的DCS控制系统,介绍自动控制系统纳入DCS的范围,使用MACSV组态软件进行现场组态和算法编程及DCS系统的特点和功能实现情况。 相似文献
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采用计算机系统实现锅炉及供热系统的优化控制,可以大大提高燃烧效率,节约能源,减少污染。本文介绍了DCS结构特点以及影响DCS的主要技术,阐述了锅炉实现DCS控制的重要意义,还阐述了锅炉控制原理,并介绍了锅炉DCS系统配置。 相似文献
5.
结合我厂新建的7#锅炉，采用和利时公司开发研制的以MACSV为组态软件的DCS控制系统。介绍自动控制系统纳入DCS的范围，使用MACSV组态软件进行现场组态和算法编程及DCS系统的特点和功能实现情况。 相似文献
6.
纵观世界各地的锅炉制造企业,直流锅炉的协调控制系统已成为相关工作人员研究和探讨的热点话题,也是目前锅炉系统中不可忽视的工作内容。在现代化社会发展中,随着国民经济和企业组织的不断完善,各企业经营规模和经营效益呈现出高速发展态势。直吹式锅炉作为目前电力系统中不可缺少的一部分,在现代化社会发展中发挥着至关重要的作用。本文主要以美国摩尔公司生产和设计的DCS计算机集散控制系统进行了分析,并着重阐述了其在200MW机组中系统的构成与应用,以供相关工作人员参考。 相似文献
7.
80年代以后,DCS控制系统逐渐取代常规仪表,成为医药化工自动化的主流。随着计算机与网络技术的飞速发展,DCS控制系统功能和性能都得到了巨大的提高。本文根据近几年的试验研究,从DCS的定义和工作原理论证了DCS控制系统在医药化工中的重要作用和应用。 相似文献
8.
热电厂DCS系统是热电厂生产控制的关键环节,循环流化床锅炉的控制是基础和核心,对循环流化床锅炉的控制涉及温度、压力、流量、电机、阀门等设备的综合调节和操作。采用Cimplicity软件完成DCS系统锅炉工艺的上位机组态的设计,实现了锅炉工艺总流程图的组态、现场数据监控、数据记录、趋势曲线、参数报表、报警光字牌和连接MicrosoftAccess数据库及其设计等用户所需要的功能。并进行了上位机与下位机的联机试验。 相似文献
9.
热电厂DCS系统是热电厂生产控制的关键环节，循环流化床锅炉的控制是基础和核心，对循环流化床锅炉的控制涉及温度、压力、流量、电机、阀门等设备的综合调节和操作。
采用Cimplicity软件完成DCS系统锅炉工艺的上位机组态的设计，实现了锅炉工艺总流程图的组态、现场数据监控、数据记录、趋势曲线、参数报表、报警光字牌和连接Microsoft Access数据库及其设计等用户所需要的功能。并进行了上位机与下位机的联机试验。 相似文献
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11.
CAN总线即控制器局域网总线，特别适合于小型分布式测控系统。本文所述的微机光照控制系统将微机监控技术和现场总线控制技术相结合，构成了一种全分散式微机光照控制系统。该系统的功能强，投资少，可靠性高，便于扩展，有着广阔的应用前景。 相似文献
12.
《Journal of The Franklin Institute》2023,360(7):4830-4851
This paper deals with the distributed secondary control problem for multiple distributed generators in an islanded microgrid. A distributed fixed-time secondary controller is designed for each generator using only its neighbors’ information, where saturation functions are introduced to the designed controllers to constrain the adverse influence of abnormal data from neighbors. Several indicator variables are introduced to reformulate the saturation function to reduce conservatism. The objective of this paper is to realize the recovery of the frequency and voltage as well as the active power-sharing within a fixed time. The fixed-time convergence of the proposed distributed control algorithm is analyzed through rigorous analysis. Also, the upper bound of the settling time is derived, which does not depend on the system’s initial state. Finally, a simulation example is utilized to verify the effectiveness of the proposed distributed control scheme by using the MATLAB/SimPowerSystems toolbox. 相似文献
13.
《Journal of The Franklin Institute》2022,359(8):3333-3365
In this paper, we study the consensus tracking control problem of a class of strict-feedback multi-agent systems (MASs) with uncertain nonlinear dynamics, input saturation, output and partial state constraints (PSCs) which are assumed to be time-varying. An adaptive distributed control scheme is proposed for consensus achievement via output feedback and event-triggered strategy in directed networks containing a spanning tree. To handle saturated control inputs, a linear form of the control input is adopted by transforming the saturation function. The radial basis function neural network (RBFNN) is applied to approximate the uncertain nonlinear dynamics. Since the system outputs are the only available data, a high-gain adaptive observer based on RBFNN is constructed to estimate the unmeasurable states. To ensure that the constraints of system outputs and partial states are never violated, a barrier Lyapunov function (BLF) with time-varying boundary function is constructed. Event-triggered control (ETC) strategy is applied to save communication resources. By using backstepping design method, the proposed distributed controller can guarantee the boundedness of all system signals, consensus tracking with a bounded error and avoidance of Zeno behavior. Finally, the correctness of the theoretical results is verified by computer simulation. 相似文献
14.
This paper studies the rendezvous problem for a class of linear systems with uncertain parameters and external disturbances under the state-dependent dynamic network, which is also called rendezvous network here. By combining potential function technique, distributed internal model design and adaptive control technique, a distributed adaptive state feedback control law is proposed to solve the rendezvous problem by completing the tasks of maintaining the connectivity of the rendezvous network, achieving asymptotic tracking, rejecting unknown external disturbances as well as handling uncertain parameters in the system dynamics, the leader system and the exosystem simultaneously. 相似文献
15.
《Journal of The Franklin Institute》2021,358(14):7055-7072
In this paper, the affine formation control problem for multi-agent systems with prescribed convergence time is investigated. Firstly, on the basis of a time-varying scaling function, a distributed continuous control algorithm is designed, under which a stationary affine formation of the nominal configuration is able to be achieved within a prescribed time. Secondly, to track a time-varying formation within the prescribed time, a distributed control protocol is proposed by employing a leader–follower control strategy. Furthermore, the boundary layer technique is adopted to avoid chattering effect. Finally, simulation examples are provided to demonstrated the effectiveness of the proposed design. 相似文献
16.
《Journal of The Franklin Institute》2022,359(2):1018-1040
In this paper, the distributed iterative learning control for nonholonomic mobile robots with a time-varying reference is investigated, in which the mobile robots are with parametric uncertainties and are not fully actuated. Besides, the control gains of mobile robots are unknown. The leader is with a time-varying reference trajectory, and there is no need to assume that the time-varying reference is linearly parameterized by a set of known functions. A distributed control scheme is designed for each mobile robot based on a set of local compensatory filters designed by its neighborhood information. Stability analysis is established through a set of composite energy function. The uniform convergence of the consensus errors can be guaranteed. An example is given to show that our designed control law is effective. 相似文献
17.
《Journal of The Franklin Institute》2022,359(17):9522-9543
This paper investigates the practical predefined-time attitude cooperation control problem for a group of rigid spacecraft under an undirected communication graph. First, since the leader is accessible to only a subset of the group members, a distributed practical predefined-time state observer is proposed to estimate the leader’s states by using a time-varying scaling function. Second, a distributed practical predefined-time attitude coordination controller is designed to guarantee that the attitude tracking errors of all follower spacecraft converge to the neighborhood of the origin within a preset time. Finally, the effectiveness of the proposed control law is demonstrated by illustrative numerical examples. 相似文献
18.
结合引进智能系统“日探CPF智能区域报警系统”扩展分布式点报警和联动控制功能的设计与实现过程，重点对CPF系统中报警传感信号采集以及分布式报警信息汇总和联动控制系统进行研究，并对引进智能系统和扩展系统协同工作和可靠性等技术要点进行了探讨。 相似文献
19.
Ahmadreza Argha Li Li Steven W. Su Hung Nguyen 《Journal of The Franklin Institute》2018,355(14):6191-6214
This paper proposes a framework for the design of sparsely distributed output feedback discrete-time sliding mode control (ODSMC) for interconnected systems. The major target here is to develop an observer based discrete-time sliding mode controller employing a sparsely distributed control network structure in which local controllers exploit some other sub-systems’ information as well as its own local information. As the local controllers/observers have access to some other sub-systems’ states, the control performance will be improved and the applicability region will be widened compared to the decentralised structure. As the first step, a stability condition is derived for the overall closed-loop system obtained from applying ODSMC to the underlying interconnected system, by assuming a priori known structure for the control/observer network. The developed LMI based controller design scheme provides the possibility to employ different information patterns such as fully distributed, sparsely distributed and decentralised patterns. In the second step, we propose a methodology to identify a sparse control/observer network structure with the least possible number of communication links that satisfies the stability condition given in the first step. The boundedness of the obtained overall closed-loop system is analysed and a bound is derived for the augmented system state which includes the closed-loop system state and the switching function. 相似文献
20.
《Journal of The Franklin Institute》2021,358(16):8270-8287
This paper studies the consensus problem for a class of nonlinear multi-agent systems with asymmetric time-varying output constraints and completely unknown non-identical control directions. Firstly, in order to deal with the problem of asymmetric time-varying output constraints, the original output-constrained multi-agent systems are transformed into new unconstrained multi-agent systems by constructing the state transformation for each agent. Secondly, the emergence of multiple Nussbaum-type function terms is avoided by introducing novel sliding-mode-esque auxiliary variables and consensus estimate variables, which allows the control directions to be completely unknown non-identical. Thirdly, a novel control strategy is proposed by combining novel variables with state transformation method for the first time, which makes the design of distributed consensus protocol more concise. Through Lyapunov stability analysis, the proposed distributed protocol ensures that the output constraints are never violated and the consensus can be achieved asymptotically. Finally, a practical simulation example is given to demonstrate the effectiveness of the proposed distributed consensus protocol. 相似文献