共查询到19条相似文献,搜索用时 78 毫秒
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异步电动机的非线性自适应控制 总被引:3,自引:0,他引:3
本文针对对磁场定向的d-q坐标系下的4阶包含机、电动力学的异步电动机的模型,运用非线性自适应的反馈线性化的控制方法,设计一个新近跟踪负载和转子电阻实际值的非线性辩识算法,一旦这两个未知常数被辩识,则可实现速度和磁链调节的解耦控制,仿真结果证明系统具有良好的稳、动态性能。 相似文献
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异步电动机的自抗扰控制器及其参数整定 总被引:21,自引:1,他引:21
针对异步电动机的控制问题设计一种自抗扰控制器,并给出了该控制器的参数整定方案。仿真实验表明,该方案可以快速有效地得到自抗扰控制器的有效参数,使闭环系统具有快速稳定的跟踪性能。所提出的参数整定方案对自抗扰控制器的使用和推广具有参考价值。 相似文献
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本文介绍了一种适合煤矿排水系统使用的三相异步电动机晶闸管软起动控制器,对控制器的电路结构及软件进行了分析并对软起动控制模式进行了选择。该装置改善了电动机起动、停止特性,有效地消除了传统起动、停车方式带来的"水锤"效应,在煤矿排水系统安全运行方面发挥着越来越重要的作用。 相似文献
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针对异步电动机矢量控制系统常规等效滑模控制存在扰动稳态误差大、抖振大、跟踪快速性差的问题,设计了一种改进的等效滑模控制器。该控制器采用改进的切换控制函数,提高了电动机的动态控制性能。仿真试验结果表明,与传统的PI控制器和常规的等效滑模控制器相比,该控制器能有效降低系统抖振,提高了系统的动态响应速度,增强了系统的鲁棒性。 相似文献
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文章介绍了三相异步电动机降压节电的原理及智能节电控制器的设计方案,并给出了按此方案研制的智能节电控制器带电动机运行和电动机额定电压运行的实验数据。 相似文献
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何云 《电子制作.电脑维护与应用》2013,(5):69-70
异步电动机在软起动过程中常出现振荡现象,这将对负荷设备产生一定的冲击,影响负荷设备的使用寿命,为了避免振荡的发生,本文通过仿真试验的方法分析了产生振荡的主要原因,并提出控制异步电动机关断角等解决方案。 相似文献
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抑制非线性影响的控制器设计 总被引:2,自引:0,他引:2
本文针对不确定非线性,提出仿线性元件思想以较好实现所期望的系统稳定裕度,从而克服非线性所造成的影响;针对确定的非线性,提出了非时变非线性可补性的概念,并应用于控制器中,实现补偿非线性的目的,系统性能逼近于线性系统,将两种方案用于飞控系统中,仿真结果表明,对抑制系统的极限环是有效的。 相似文献
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In this work the control of an induction motor using fuzzy gain scheduling of PI controller (adaptive FLC-PI) is presented. Fuzzy rules are utilized on-line to determine the controller parameters based on tracking error and its first time derivative. Simulation and experimental results of the proposed scheme show good performances compared to the PI controller with fixed parameters. 相似文献
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Design of Nonlinear Decoupling Controller for Double-electromagnet Suspension System 总被引:1,自引:0,他引:1
Aiming at the coupling characteristic between the two groups of electromagnets embedded in the module of the maglev train, a nonlinear decoupling controller is designed. The module is modeled as a double-electromagnet system, and based on some reasonable assumptions its nonlinear mathematical model, a MIMO coupling system, is derived. To realize the linearization and decoupling
from the input to the output, the model is linearized exactly by means of feedback linearization, and an equivalent linear decoupling model is obtained. Based on the linear model, a nonlinear suspension
controller is designed using state feedback. Simulations and experiments show that the controller can effectually solve the coupling problem in double-electromagnet suspension system. 相似文献
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双电磁铁悬浮系统的非线性解耦控制器设计 总被引:3,自引:0,他引:3
LIU De-Sheng LI Jie ZHANG Kun 《自动化学报》2006,32(3):321-328
Aiming at the coupling characteristic between the two groups of electromagnets embedded in the module of the maglev train, a nonlinear decoupling controller is designed. The module is modeled as a double-electromagnet system, and based on some reasonable assumptions its nonlinear mathematical model, a MIMO coupling system, is derived. To realize the linearization and decoupling from the input to the output, the model is linearized exactly by means of feedback linearization, andan equivalent linear decoupling model is obtained. Based on the linear model, a nonlinear suspension controller is designed using state feedback. Simulations and experiments show that the controller can effectually solve the coupling problem in double-electromagnet suspension system. 相似文献
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This paper deals with the design of a nonlinear observer for sensorless induction motor control. Based upon the circle criterion approach, a nonlinear observer is designed to estimate pertinent but unmeasurable state variables of the considered induction machine for sensorless control purpose. The observer gain matrices are computed as a solution of linear matrix inequalities(LMI) that ensure the stability conditions of the state observer error dynamics in the sense of Lyapunov concepts. Measured and estimated state variables can be exploited to perform a state feedback control of the machine system. The simulation results are presented to illustrate the effectiveness of the proposed approach for nonlinear observer design. 相似文献
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In this work, a concurrent proportional integral (PI) controller design technique is addressed for indirect vector controlled induction motor (IVCIM). For this, a full‐order induction motor (IM) model is employed that includes the stator current dynamics. The current‐loop proportional integral (PI) controllers are tuned to use the attributes of such dynamics. The robustness against load torque and rotor resistance variations are incorporated in the design problem. This method is implemented using a static output feedback scheme in which iterative linear matrix inequality (ILMI) based H∞ control technique is applied. The simulation and experimental comparison with existing designs show the superiority of proposed method and practical interest for industry use. 相似文献
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无轴承异步电机具有非线性、多变量和强耦合的特点,要实现电机稳定悬浮和旋转运行,必须对其进行非线性动态解耦控制。为了克服逆系统方法精确建模难的局限性,采用基于最小二乘支持向量机(LS-SVM)α阶逆系统方法对无轴承异步电机进行动态解耦控制的研究。首先利用最小二乘支持向量机辨识出无轴承异步电机的逆模型,然后将它串联在原系统前,将无轴承异步电机解耦成四个独立的伪线性子系统-2个径向位移子系统、一个速度子系统和一个磁链子系统。为保证鲁棒性能,最后对解耦后的系统采用非线性内模控制策略。研究表明,LS-SVMα阶逆系统方法能够实现无轴承异步电机径向悬浮力和旋转力之间的动态解耦控制,控制系统具有良好的静态和动态性能。 相似文献