查询词典 robust statistics

Based on structural singular value theory, the robust control model for vibration response is built, and the design method of μ- synthesis controller is presented. The main ideal is as follows: by introducing fictive uncertainty, the robust performance problem of vibration response is transformed into the robust stability problem of the augmented system. It can be solved by D K iteration.

基于鲁棒结构奇异值理论，建立了振动响应的鲁棒控制模型，提出了设计鲁棒μ控制器的方法，通过引入虚构的不确定块，将振动系统响应性能的问题转化为广义系统的稳定鲁棒性问题求解，兼顾了系统的稳定鲁棒性和性能鲁棒性。

The major contributions of this dissertation are as follows:(1) Based on integral inequality, an LMI approach to the robust stability, robust stabilization and robust H_∞control of uncertain continuous-time and discrete-time linear singular systems with time-varying delay is developed.

论文主要工作有以下几个方面：(1)针对一类具有范数有界不确定的线性奇异时变时滞系统，基于积分不等式或有限和不等式，分别讨论连续和离散情形下的鲁棒稳定、鲁棒可镇定问题和鲁棒H_∞控制问题。

To weaken the influences of the position-dependent periodic disturbances and parameter uncertainties, the robust repetitive controller was designed, which associated structure singular value theory with the discrete-time repetitive control theory. The problem of robust repetitive control was transformed into one of H∞ optimal control using linear fractional transformation. The robust repetitive controller was achieved using D-K iteration procedure and made the servo system have stability, robustness and tracking performance.

为了削弱周期性扰动及参数变化不确定性的影响，将重复控制和结构奇异值理论相结合，利用线性分式变换(linear fractional transformation，LFT)将鲁棒重复控制问题转换成H∞最优控制问题，采用D-K迭代法设计鲁棒重复控制器(robust repetitive controller，RRC)，实现系统的稳定性和鲁棒性，提高系统的跟踪特性。

The sufficient conditions to guarantee robust exponential stability for the closed-loop systems are obtained based on Linear Matrix Inequality, moreover, the approach of design of robust H# output feedback controller is introduced.3 The problem of reliable H# control for a class of Lur"e systems with polytopic uncertainties is studied when all control components are operational as well as when some control components experience failures, the design approach of reliable H# controller is also obtained.4 Considering a class of uncertain Lur"e singular system with time-delays, the problem of robust stability is investigated based on Barbalats Lemma and nonsingular linear transformation of model reduction.

针对一类不确定Lur'e奇异时滞系统，基于Barbalat引理以及非奇异降阶变换，讨论了Lur'e奇异时滞系统的鲁棒稳定问题，提出了鲁棒H_∞状态浙江大学博士学位论文反馈控制器的设计方法。5、针对一类具有饱和执行器的不确定Lur'e奇异系统，提出了时滞依赖的鲁棒稳定与鲁棒二次镇定的充分条件，所的结果不需要参数的整定。6、针对任意协方差有界的有色噪声，讨论了一类不确定Lur'e奇异系统的鲁棒凡滤波问题，得出了鲁棒几滤波器设计的充分条件。7、针对一类不确定Lur'e时滞系统，通过线性变换，把它转换成奇异系统，根据奇异系统鲁棒控制理论所得出的鲁棒稳定与鲁棒镇定控制器设计的充分条件具有很小的保守性。

In fact, the control problems of the sonar array posture are track control problems. So On the basis of theoretic study, the author designs the robust output track control of the posture of the sonar base with regulable parameter and applies the study results of measurable disturbance decoupling and robust output track to the minehunting sonar array posture control, a robust control strategy with disturbance decoupling, output track and compensation for uncertainty is found.

猎雷声纳基阵的姿态控制问题实质上是跟踪控制问题，在进行理论研究的基础上，作者设计了具有可调参数声纳基阵姿态鲁棒输出跟踪控制系统，并基于反馈线性化方法将可测干扰解耦研究结果与鲁棒输出跟踪研究结果相结合，形成了同时具有干扰解耦、输出跟踪和不确定性补偿的猎雷声纳基阵鲁棒控制策略。

Based on the problem of robust stability, poles placement method is applied to get the desired decentralized robust controllers, and two classes of control systems for 4th and 5th joints of PUMA562 and pendulum400 are used to test validness of the proposed approaches.The simulations and practical results show that the theoretical research is valid and reliable. The control scheme appears feasible. A new design approach has been offered to robust control.

本文所提方法经过了较严密的理论推导，仿真实验和实际运行结果都证明了理论研究工作的有效性和先进性，为机器人和类似关节的机械的控制提供了新的设计方法。

By continuous working for 60 years, the Chinese geodesists have developed the quasi-stable adjustment principle, robust estimation based on equivalent weight principle, robust estimation for correlated observations, adaptively robust filters etc.

中国学者经过60年不懈努力，在自由网平差、拟稳平差、半参数估计、不适定问题解算方法、抗差估计、自适应滤波等领域做出了重要贡献，建立了许多新的理论、模型和方法，推进了大地测量数据处理理论的进展。

Considering the characters of the waveform of impulsive noise, on the base of robust statistics, the thesis uses the robust statistical function mending the customary adaptive algorithm based on second order statistic, applies it to the system identification problem.

考虑到α-稳定分布波形的性质，在稳健估计理论的基础上，利用稳健估计函数改进了原有的基于二阶矩的自适应算法。

In the magazine and thesis of the international statistics, there are more and more articles about robust statistics.

国际上统计学界的杂志及论文集上，有关稳健统计学的文章源源不断。

Robust Statistics occurred at the beginning of the 19th century, and has developed with the quick development of electronic technology since 1960's, now it becomes a active researching realm of the statistics.

稳健统计学早在十九世纪初就有萌芽，从二十世纪六十年代起随着电子技术的迅速发展而倍受重视，如今已成为统计学中的一个活跃的研究领域。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。