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The permanent magnet synchronous motors (PMSMs) may experience chaotic behaviours with systemic parameters falling into a certain area or under certain working conditions, which threaten the secure and stable operation of motor-driven. Hence, it is important to study the methods of controlling or suppressing chaos in PMSMs. In this work, the Takagi-Sugeno (T-S) fuzzy impulsive control model for PMSMs is established via the T-S modelling methodology and impulsive technology. Based on the new model, the control conditions of asymptotieal stability and exponential stability for PMSMs have been derived by the Lyapunov method. Finaily, an illustrated example is also given to show the effectiveness of the obtained results. 相似文献
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编组站是靶场光路传输系统的重要组成部分,编组站镜架的稳定性对光路的传输有着直接的影响。为了分析微振动对光束指向性的影响,采用有限元分析软件建立镜架的有限元模型,将数字式地震仪测得的镜架安装平台的速度功率谱密度函数作为载荷施加到分析模型上,计算得到了编组站光学元件(A,B,C,D)在基座微振动激励作用下的转角漂移分别为0.338,0.327,0.289,0.241 mrad,均小于稳定性指标0.460 mrad的要求;采用加速度传感器对光学元件A的转角漂移测试结果为0.340 mrad,与分析结果的误差为0.6%,说明所采用的计算分析方法是有效的,为精密镜架的设计分析提供了有效的方法。 相似文献
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Exponential stability of cellular neural networks with multiple time delays and impulsive effects 下载免费PDF全文
In this work, the stability issues of the equilibrium points of the cellular neural networks with multiple time delays and impulsive effects are investigated. Based on the stability theory of Lyapunov-Krasovskii, the method of linear matrix inequality (LMI) and parametrized first-order model transformation, several novel conditions guaranteeing the delaydependent and the delay-independent exponential stabilities are obtained. A numerical example is given to illustrate the effectiveness of our results. 相似文献
4.
The permanent magnet synchronous motors (PMSMs) may have chaotic
behaviours for the uncertain values of parameters or under certain
working conditions, which threatens the secure and stable operation
of motor-driven. It is important to study methods of controlling or
suppressing chaos in PMSMs. In this paper, robust stabilities of PMSM
with parameter uncertainties are investigated. After the uncertain
matrices which represent the variable system parameters are
formulated through matrix analysis, a novel asymptotical stability
criterion is established. Some illustrated examples are also given to
show the effectiveness of the obtained results. 相似文献
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基于多股螺旋弹簧工作过程中钢丝表面发生的扭动微动磨损,建立了多股簧受冲击载荷时,各股钢丝间法向接触力及角位移值的数学模型;通过数学模型所得到的试验参数,在新型试验装置上真实模拟了多股簧工作过程中钢丝间发生的柱-柱接触扭动微动;研究了多股簧钢丝在扭动微动条件下的运行行为和损伤机理.结果表明:钢丝间法向接触力大小、角位移幅值及循环次数对扭动微动行为影响很大;扭动微动T-θ曲线在平行四边形状、椭圆状和直线状3种基本类型之间转变;损伤在部分滑移区较轻微,其磨损主要表现为磨粒磨损和轻微氧化磨损;对于混合区和滑移区,损伤加剧,磨痕表面有明显的塑性变形,损伤机制主要为磨粒磨损、氧化磨损和剥层. 相似文献
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针对多股螺旋弹簧加工机床张力控制系统的非线性特性及存在干扰的问题,提出了基于支持向量回归(Support Vector Regression, 简称SVR)的有效抑制噪声的控制算法;即在基于SVR的逆动力学建模中采取非线性松弛因子替代线性松弛因子,抑制噪声在建模过程中的影响,提高建模精度;把系统逆模型作为前馈控制器,构成伪线性系统,PID控制器作为反馈控制,组成有效抑制噪声的复合控制算法;实验结果表明,这种改进基于SVR的复合控制方式在多股螺旋弹簧张力控制系统中具有较好的控制精度和鲁棒性。 相似文献
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Impulsive control for permanent magnet synchronous motors with uncertainties: LMI approach 下载免费PDF全文
A permanent magnet synchronous motor (PMSM) may have
chaotic behaviours under certain working conditions, especially for
uncertain values of parameters, which threatens the security and
stability of motor-driven operation. Hence, it is important to study
methods of controlling or suppressing chaos in PMSMs. In this paper,
the stability of a PMSM with parameter uncertainties is investigated.
After uncertain matrices which represent the variable system
parameters are formulated through matrix analysis, a novel
asymptotical stability criterion is established by employing the
method of Lyapunov functions and linear matrix inequality
technology. An example is also given to illustrate the
effectiveness of our results. 相似文献