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针对开关磁阻电机(SRM)调速系统的严重非线性、时变和强耦合性,应用免疫反馈机理、模糊控制技术以及自适应PSD控制律,在传统PID控制器基础上设计一种模糊免疫PSD控制器,实现了SRM系统的智能控制。仿真结果表明,采用该方法能使SRM系统获得良好的控制性能,并能减少参数调整的工作量。 相似文献
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设计了一种基于现场可编程门阵列(FPGA)的模糊控制器,用于对开关磁阻电机(SRM)进行调速控制。该数字模糊控制器将复杂的模糊控制算法用一块简单的逻辑芯片实现,不仅能满足SRM对实时性、可靠性的要求,同时还可以提高整个调速系统的综合性能。 相似文献
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神经—模糊控制在交流变频调速中的应用 总被引:3,自引:0,他引:3
研究神经-模糊控制器在微机控制交流调速系统中的应用问题,文中给出了这种神经-模糊控制顺的基本设计方法及其自学习算法,由于这种控制器兼具有神经网络和模糊控制的优点,仿真结果表明了此控制器的优良性能,是实现交流调速智能控制的一条新途径。 相似文献
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针对交流调速系统中的电机提出用模糊神经网络控制的方法,并进行仿真实验。结果表明,这种控制器具有很强的自学习能力和鲁棒性,使交流调速系统的性能明显提高。 相似文献
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分析了开关磁阻电动机调速系统(SRD)的工作原理及开关磁阻电动机(SRM)的非线性电感模型.在此基础上,对其进行了简化处理,并采用模糊控制器对SRM的开关角进行实时补偿,同时建立了基于电流斩波控制的四相SRM非线性仿真模型,通过仿真验证了该控制方式的正确性,证明了该模型不但计算相对简单且能有效减小转矩脉动和提高系统的动... 相似文献
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基于模糊自适应PI控制的SRM直接瞬时转矩控制系统 总被引:1,自引:0,他引:1
《电机与控制应用》2014,(6)
利用直接瞬时转矩控制(DITC)方法改善开关磁阻电机(SRM)转矩脉动过大的问题。将模糊逻辑与PI控制相结合形成模糊自适应PI控制策略,构成了SRM的调速系统,改善了SRM高度非线性难以用传统PI控制取得较好控制效果的问题。仿真结果表明,DITC方法能够有效地控制转矩,转矩波形明显优于传统控制方法的转矩波形,有效地抑制了转矩脉动。模糊自适应PI控制器对高非线性的SRM取得较好的控制效果,提高了系统动态响应,减小了超调量,稳定性强。 相似文献
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开关磁阻电机(SRM)的转矩脉动是其主要的缺点.采用了直接瞬时转矩控制(DITC)的方法来抑制开关磁阻电动机的转矩脉动.但开关磁阻电动机的非线性难以构成高性能的调速系统,因此又提出了模糊控制理论与常规PI调节器相结合而构建的模糊PI复合控制方法,并将该控制器应用于DITC系统进行了仿真研究.仿真实验结果表明,DITC方法能够有效减小SRM的转矩脉动,而且模糊PI控制器能够使系统动态响应快、超调小、动静态性能优越、鲁棒性强. 相似文献
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基于专家系统的自校正模糊控制器 总被引:1,自引:0,他引:1
针对传统模糊控制器的不足 ,构造了一种基于专家系统的自校正模糊控制器 ,丰富了模糊控制器的结构及内容 ,改善了其性能。仿真研究证明该控制器的有效性。 相似文献
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Yogesh Krishan Bhateshvar Hitesh Datt Mathur Houria Siguerdidjane Surekha Bhanot 《电力部件与系统》2015,43(2):146-156
Abstract—This article develops a model of load frequency control for an interconnected two-area thermal–hydro power system under a deregulated environment. In this article, a fuzzy logic controller is optimized by a genetic algorithm in two steps. The first step of fuzzy logic controller optimization is for variable range optimization, and the second step is for the optimization of scaling and gain parameters. Further, the genetic algorithm-optimized fuzzy logic controller is compared against a conventional proportional-integral-derivative controller and a simple fuzzy logic controller. The proposed genetic algorithm-optimized fuzzy logic controller shows better dynamic response following a step-load change with combination of poolco and bilateral contracts in a deregulated environment. In this article, the effect of the governor dead band is also considered. In addition, performance of genetic algorithm-optimized fuzzy logic controller also has been examined for various step-load changes in different distribution unit demands and compared with the proportional-integral-derivative controller and simple fuzzy logic controller. 相似文献
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针对模糊控制器内部工作机理未知的问题,提出一种区间二型(IT2)模糊PI/PD控制器,并推导了该IT2模糊控制器的解析结构。该模糊控制器采用Mamdani型规则形式,为每个输入变量仅分配两个IT2模糊集合,具有规则数量少、规则不确定性影响小、控制输出平滑等优点。根据IT2模糊控制器的降型特点,将整个输入空间划分为15个分区,进而推导出在每个分区上控制输出的数学表达式,证明出该IT2模糊控制器等效为具有变增益的非线性比例积分(PI)或比例微分(PD)控制器。最后,在仿真和实验中与相对应的一型模糊控制器和传统PI控制器的控制效果进行对比,验证了该IT2模糊PI/PD控制器的有效性。 相似文献
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Design of a fuzzy logic power system controller with satisfactory performance is not an easy task. The difficulties come from two aspects. First, design of a fuzzy logic controller mainly uses the experience of the human experts. To acquire enough heuristic knowledge from the domain experts and to represent this kind of knowledge appropriately with a set of fuzzy rules present difficulties. Second, it is difficult to appropriately tune the parameters used in the fuzzy logic controller. These parameters are commonly determined by a “trial and error” method which is rather time consuming. In this paper, genetic algorithm is introduced to design an optimal fuzzy logic controller. The proposed method has been used to design an optimal fuzzy logic excitation controller for a generating unit. Test results with the fuzzy logic controller show very satisfactory results 相似文献
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为了解决基本模糊控制稳态精度欠佳的问题,在无刷直流电机伺服系统的设计中提出了积分自整定模糊控制方案。该方法根据模糊控制规则和实际工程经验,在基本模糊控制的基础上增加了一个系数自整定积分器。仿真结果表明,积分自整定模糊控制的动态和稳态性能均优于常规模糊控制。 相似文献
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为了解决基本模糊控制稳态精度欠佳的问题,在无刷直流电机伺服系统的设计中提出了积分自整定模糊控制方案。该方法根据模糊控制规则和实际工程经验,在基本模糊控制的基础上增加了一个系数自整定积分器。仿真结果表明,积分自整定模糊控制的动态和稳态性能均优于常规模糊控制。 相似文献
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《International Journal of Electrical Power & Energy Systems》2013,44(1):889-898
In this study, speed control of a permanent magnet synchronous motor (PMSM) with genetic based fuzzy controller has been simulated. Earlier studies have focused on different components of fuzzy controllers such as rule base or data base in the literature. However, in this study, the whole knowledge base is parameterized and optimized to obtain an optimal fuzzy controller without expert knowledge. In the developed control scheme, there are three closed loops. The two inner loops are the current and the velocity feedbacks, respectively. The other outer feedback is the genetic algorithm (GA) which optimizes the rule base and data base of the fuzzy controller simultaneously. This outer loop is an iterative process. To make comparisons, a conventional fuzzy controller also has been designed and the PMSM speed control has been simulated for both the proposed and conventional fuzzy controller. The comparative results have proved that the proposed controller has a better dynamic response than that of the conventional one. 相似文献