系统不确定性的英文
systematic uncertainty
例句与用法
更多例句： 下一页- The problem of iterative learning control in the presence of initial repositioning errors is addressed without assuming the bound on the repositioning errors to be small enough for the consideration of convergence
摘要提出系统不确定性项定常参数化和时变参数化情形下的控制器设计方法，它允许初始位置任意设置且定位误差不要求足够小。 - This dissertation is meant to combine the theory of stochastic processes and the theory of fuzzy sets to find some new methods of system modeling , analysis and control by describe uncertainty more minutely , and then to balance the optimization and the robustness
本文的目的是综合运用随机过程和模糊集合论的方法，通过更加精细地刻画系统不确定性，探索具有模糊随机不确定性的系统建模、分析和控制的新方法，并期望在最优性与鲁棒性之间寻求比较好的结合点。 - People , ship and environment are all dynamic states , which form a comprehensive and mutual implication system . applied dynamic layout theory and optimum cybernetics make the comprehensive policy and dominance on system uncertainty due to complexity and changeability of the sea environment
人、船舶和环境都是动态因素，是一个十分复杂的相互牵连系统，应用动态规划理论和最优控制理论，对航行环境的复杂性和可变性而导致系统不确定性作出综合决策和控制，并对改向决策后的船舶操作运动进行控制实现。 - The dissertation refers to comparatively full literatures in the field of vsc , and the development history and characteristics of vsc are summarized , and the elementary concepts , elementary definitions , elementary properties , elementary principles and design methods are particularly introduced , and the causes of the chattering phenomenon are systematically analysed , and the study status of the chattering phenomenon and the main methods to eliminate the chattering are elaborated . for the deficiencies of traditionary methods , three improved methods are developed , which are improved exponent reaching law solution , variable boundary layer solution and the solution by adding an auxiliary continuous control term . for uncertain linear systems , an adaptive fuzzy integral variable structure control stategy ( afivsc ) is put forward to eliminate the chattering around the sliding plane , which introduces fuzzy logic to soften the non - linear discontinuous sig nal in the control variable and utilizes adaptive theory to adjust output membership function according to how much the uncertainty of the system is
比较全面地查阅了关于变结构控制理论的文献，总结了滑模变结构控制的发展历史和特点，详细介绍了变结构控制的基本概念、基本定义、基本性质、基本原理以及设计方法；系统分析了变结构控制系统抖振产生的机理，并阐述了国内外目前对抖振问题的研究现状以及消除抖振的主要方法；针对传统抑制和消除抖振方法的不足，改进了传统方法，得到了三种新的消除抖振的方法? ?即改进的指数趋近律法、可变边界层法和附加连续项法；针对不确定性线性系统，在变结构控制策略中引入模糊逻辑和自适应理论来消除滑动平面上的抖振，提出了一种自适应模糊积分变结构控制方案( afivsc ) ，利用模糊逻辑来柔化控制量中非线性不连续部分，采用自适应理论，根据系统不确定性大小在线调整模糊输出量的隶属函数，另外，鉴于模糊控制本质上是有静差的，所以本文选择了带积分项的切换函数，由于积分项的存在使系统较正为无静差系统。 - Mixed sensitivity approach is used to ensure the system to retrain the exoteric low interference at low frequency , and to be robust and stable when the system exist uncertainty at high frequency . and the steps of selecting weights functions is concluded according to abnormal hn problems . ( 2 ) the neural network is used to further suppress the system uncertainty and error resulted from exoteric interference to improve the control precision by its good learning ability
其中， ( 1 )鲁棒控制器基于h控制理论，用混合灵敏度设计方法保证系统在低频段抑制外界的低频干扰，而在高频段能保证在系统不确定性存在的情况下，仍然使系统达到鲁棒稳定的性能，并对非标准h问题，总结出选择加权因子的步骤； ( 2 )神经网络控制器利用神经网络的良好泛化能力，进一步抑制由于系统不确定性因素和外界干扰而引起的系统误差，从而提高控制精度。
