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本文介绍了以青海石油管道中间站对象,设计开发一套长输管道输油站集散控制系统(DCS)并研究开发了一个适用于输油管道直接加热炉的自动点火控制和多变量燃烧效率优化控制策略,一年多来的运行结果表明:系统稳定可靠,提高了长输管线的经济效益。本文介绍了系统组成,系统功能,控制策略及经济效益。 相似文献
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逆奈氏阵列(INA)设计方法在多变量控制系统的频域设计中占有重要的地位,而行之有效的CAD实现方法以圩其成功应用是必不可少的。本文探讨了在MATLAB环境下INA方法CAD的简捷实现途径,提出了具体的实现方法。 相似文献
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本文对由5台燃烧工业锅炉及其辅助设备构成的集中供热系统采用位总线分布式计算机网络进行监控管理,主计算机中采用TurboC/语言设计的监控管理软件,对被监测的300多个变量以模拟,参数表格等形式实时是,打印,并实现对主要变量的控制。 相似文献
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本文介绍了以矩阵分式描述的单变量和多变量控制系统动态补偿器的计算机辅助设计(简称CAD)软件系统。本软件共包括了十种动态补偿器的设计,用户可不必了解其中控制算法的细节及程序结构,便能很快设计出符合要要求的控制系统,并可对设计的系统进行仿真运算,给出数值结果和图表显示结果。本软件包括了控制系统多项式矩阵设计理论方面研究的许多新成果,是一个实用的软件设计工具。全部程序均用C语言编写。 相似文献
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介绍了基于CORDIC一维离散余弦变换(DCT)的ASIC设计,给出了1-D DCT的行为级VHDL描述,验证其功能的正确性,设计采用层次式设计,顶层用结构级描述,底层各功能子模块用RTL级描述,整个系统在SYNOPSYS工具上进行设计及仿真,最终综合到门级电路。 相似文献
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针对双向拉伸聚丙烯薄膜生产(BOPP)的测厚系统模型进行研究,测厚系统是一个复杂的多变量控制系统,采用逆奈奎斯特阵列法对该耦合的多变量系统进行解耦设计,通过仿真设计证明,这种解耦方法比较容易掌握,并且解耦效果良好。 相似文献
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本文主要介绍MICROTDC3000DCS在烧结机控制中的实际应用。本文通过对系统的整体配置,配料控制系统、点火燃烧控制系统的介绍,给出了一种集散控制系统实际应用的设计方案。 相似文献
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介绍了IC(集成电路)引线框多工位冲裁级进模工步设计CAD系统及其实例。 相似文献
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A method of control design for linear systems and some nonlinear systems is considered. The class of systems is characterized by the presence of coordinate and parametric feedback control signals. The system can be presented as consisting of two control channels: one controlling the system in a specified domain and the other to drive the system into this domain. The proposed method for binary system design is based on the solution of the Lyapunov-Bellman equations. The Lyapunov-Bellman function (or the optimal Lyapunov function, namely, the solution of the correspondent equation) is used to design the second channel of control. The analytical design problem of this channel is formulated as an optimal control problem under a cost functional of special type 相似文献
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针对网络控制系统中前向通道和反馈通道同时存在随机延迟及延时不确定的问题,通过实例分析了随机延时对闭环控制系统影响的根源,提出了通过基于神经网络的预测控制方法解决存在网络随机延时的控制系统闭环控制的可行性。仿真结果表明该方法能够反映并预测该测量数据所代表的网络路径之间的时延特性,并能在基于Internet的闭环控制系统的设计中有效地替代实际网络进行研究;而所用的方法具有快速、准确的特点,能用于在线学习网络模型并对网络的时延值进行预测,为基于Internet的远程闭环控制提供了新的思路。 相似文献
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从工程应用角度出发,提出一种用H∞控制理论设计一类多变量系统的次优敏感性控制器的工程设计方法,并证明了其可行性.该方法通过将系统矩阵化为对角占优,利用单独通道设计思想将多变量系统转化为单变量系统的H∞最优敏感性控制器问题.文末给出了仿真实例. 相似文献
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Recently, light emitting diode (LED) technology has been the focus of the information technology and green technology industries.The visible light communication (VLC) system uses LED technology for simultaneous illumination and data transmission. Therefore, the VLC system provides illumination to the user, which can provide both high quality multimedia services and various application services. The main concerns of VLC systems are illumination and bit error rate (BER) performance. Consequently, it is necessary to analyze the illumination control and method of transmitting multimedia data in the VLC system. In this paper, we propose a method to effectively transmit and Red, Green, Blue (RGB) three-color LED to video signal while providing dimming and color control from the VLC system. In the VLC system, LEDs can generate various colors of light by controlling the mixing ratio of each individual RGB color element. Thus, each RGB channel will have a different signal power, and each channel will have different performance. Therefore, we present a novel resource allocation using the RGB channel state information to allocate the multi-layers of video in the VLC system. The conventional system allocates the fixed channel to a scalable video coding (SVC) signal. However, the proposed system allocates a high priority to the SVC signal channel.As a result of computer simulation tests, the proposed system can improve the BER performance compared to the conventional system. 相似文献
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Chang-Jun Ahn Dongsoo Har Tatsuya Omori Ken-ya Hashimoto 《Digital Signal Processing》2012,22(3):518-525
In a wireless network, the signals transmitted from one sender to different users have independent channel fluctuation characteristics. The diversity that exists between users is called multiuser diversity and can be exploited by the sender to enhance the capacity of wireless network. In multiuser diversity OFDMA system, exploiting channel fluctuation diversity is in essence done by selecting the user with the strong subcarrier channels. The individual subcarrier selection for each user can achieve the best system performance but high signaling overhead and high system complexity are required. On the other hand, the adaptive subcarrier block method achieves worse BER than that of individual subcarrier selection. This is because the selected block contains the poor channel subcarriers. To overcome this problem, in this paper, we propose an adaptive subcarrier block selection with frequency symbol spreading for an OFDMA system. 相似文献
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Robust Stabilization of Uncertain Fuzzy Systems Using Variable Structure System Approach 总被引:2,自引:0,他引:2
Han Ho Choi 《Fuzzy Systems, IEEE Transactions on》2008,16(3):715-724
Based on the variable structure system (VSS) theory, we develop a fuzzy control system design method for a class of uncertain nonlinear multivariable systems that can be represented by a Takagi-Sugeno fuzzy model. We make the first attempt to relax the restrictive assumption that each nominal local system model shares the same input channel, which is required in the traditional VSS-based fuzzy control design methods. As the local controller we use a sliding mode controller with a switching feedback control term. In terms of linear matrix inequalities (LMIs), we derive a sufficient condition for the existence of linear sliding surfaces guaranteeing asymptotic stability of the reduced-order equivalent sliding mode dynamics. We present an LMI characterization of such sliding surfaces. We also give an LMI-based algorithm to design the switching feedback control term so that a stable sliding motion is induced in finite time. Finally, we give a numerical design example. 相似文献
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王军 《自动化与仪器仪表》2020,(1):70-73
为了提高网络数据动态传输与存储安全自动监测能力,进行监测系统优化设计,提出基于负载均衡调度和嵌入式总线传输控制的网络数据动态传输与存储安全自动监测系统设计方法。构建网络数据动态传输的信道均衡调度模型,采用随机线性均衡控制方法进行网络数据动态传输与存储过程中的信道自适应调度,提取网络数据动态传输过程中的模糊关联规则,采用自适应的链路转发控制方法进行网络数据动态传输与存储的安全监测和负载均衡调度。在嵌入式总线协议下进行网络数据动态传输与存储安全自动监测系统的软件开发设计。仿真结果表明,采用该方法进行网络数据动态传输与存储安全自动监测的稳定性较好,自适应控制能力较强,降低了网络数据动态传输的误比特率。 相似文献