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In this method, two fuzzy logic systems are used to approximate unknown functions, and an error compensator is designed to reduce the influence of approximation error on tracking accuracy.

针对一类非线性系统提出了间接自适应模糊控制方法,该方法用模糊逻辑系统逼近未知函数,并设计误差补偿器来减少逼近误差对跟踪精度的影响。

By using the interpolation mechanism of fuzzy system, an approach of building the series of fuzzy systems, which can uniformly approximate any continuous function on a compact domain to any accuracy, is given, and then the universal approximation theorem is generally proved.

利用模糊系统的插值模型来代替被控对象的真实模型,设计了一个自适应模糊控制策略;为保证系统的全局稳定性,增加了一个补偿控制律,它是根据模糊系统的逼近误差估计量来设计的,因此这里系统跟踪误差的收敛性不依赖于模型最小误差的平方可积性[70,71]。

We have proposed the switching adaptive control law for the systems and designed the Lyapunov function in this thesis. It is proved that the proposed switching adaptive control law guarantees the solutions of the nonlinear systems boundedness and convergence of the tracking error to a residual set based on the Lyapunovs stability theory. The residual set can be made arbitrarily small by choosing a certain design parameters.

文中设计出了这类系统的切换自适应控制律,并构造出相应的Lyapunov函数,基于Lyapunov稳定性理论证明了系统在所设计的控制律作用下,闭环信号都有界并且跟踪误差收敛到一个集合,通过选择适当的参数可使这个集合任意小。

When the errors meet certain requirements, the adaptive law based on the Lyapunov stability further adjusts the weights of networks to ensure the asymptotic convergence of the tracking error to be zero.

当误差满足一定要求时,根据Lyapunov稳定性理论的自适应律进一步调整网络权值,以保证机械手位置误差和速度跟踪误差渐近收敛于零。

The nonlinear plant is first linearised, the fuzzy basis function vector is then introduced to adaptively learn the upper bound of the system uncertainty vector,and its output is used as the parameters of the compansator in the sense that both the robustness and the asymptotic error convergence can be obtained for the closed loop nonlinear control system.

在该方法中,首先将非线性系统线性化,然后利用模糊基函数向量自适应学习系统不确定向量的上界,模糊基函数向量可作为补偿控制器的一个参数。在控制系统的设计过程中可充分保证非线性控制系统的鲁棒性和跟踪误差的渐进收敛性。

A differential-difference mixed-type adaptive law and an adaptive learning control method are constructed to ensure the asymptotic convergence of the extended tracking error in the sense of square error norm.

通过引进新颖的微分-差分混合型参数自适应律,使广义跟踪误差在误差平方范数意义下渐近收敛于零。

With the demand of quick respond and precision for missile flight in terminal guidance, an adaptive nonlinear controller is designed that guarantees tracking performance when the uncertain parameters vary within stability bound. In order to achieve asymptotic tracking, adaptation is introduced to enhance closed-loop robustness, while mach number and mass changes with 35%.

文中根据导弹响应快和精度高的基本要求,在导弹变向跟踪接近目标时,对导弹制导控制过程中的控制方法进行研究和数学推导,提出了一种导弹末制导的自适应控制方法,该方法提高了导弹马赫数和质量在较大范围(35%)内变化时系统的响应精度和稳定性。

In this paper Using the single linear array CCD and the principle of autocollimation measuring angle, a novel method for measuring two-dimensional small angle is presented in the paper, in which the single linear array CCD combines with N pattern reticule to trace and measure simultaneously two-dimensional small angle with high measuring frequency.

本文采用单一线阵CCD原理及自准测角、一种测量二维小角度介绍文章其中单一线阵CCD模式结合镜头氮同步跟踪测量二维小角测量频率高。

Because of the multimodality of its autocorrelation function, it makes acquisition and tracking more challenging.

由于其自相关函数的多峰性,将增加这种信号的捕获难度和误跟踪的可能性。

The courseware reflects the process of experiments by the text and pictures in particular. through the courseware, the autodidact could acquire a strong impression about experiments, and then understanding the principle and whole experiment process in detail. the prepare lesson before experiment using this courseware will achieved the knowledge of experiments.

课件通过图片形式对每个实验流程进行了全程跟踪,并按照顺序显示与播放,使自学者可形象真实地了解实验的全过程,并留下深刻的感性认识,达到了虚拟仿真的实验预习效果。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

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但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。