变结构控制系统 meaning in English
vaiable structure control system
Examples
- 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。 - Abstract : the physical significances of the reaching law parameters and the qualitative relationships among them in variable structure control ( vsc ) are analyzed . according to the relationships , a reaching law control method is put forward based on fuzzy rules . to improve control quality , the reaching law parameters are selected by fuzzy rules . the control scheme presented in this paper not only preserves the advantages of traditional reaching law control , that is , insensitivity to any variation and perturbation of the plant parameters , but also possesses the adaptation to control quality of variable structure control systems . the simulation results show the chattering in vsc systems is highly reduced
文摘:分析了变结构控制设计方法中趋近律参数的物理意义及参数之间的定性关系，根据这些参数的定性和不精确关系，提出了基于模糊规则的趋近律控制? ?模糊趋近律控制，即用模糊规则来选择趋近律的参数，以达到改善品质控制的目的.仿真结果表明，笔者给出的方法既保留了传统趋近律方法所具有的较强鲁棒性优点，又使控制系统的品质控制具有较强的自适应性，同时还比传统趋近律方法更有效地削弱变结构控制系统中固有的颤振 - Thirdly , with the simplest single - input discrete system as the model , we analyze and discuss the effects for control - delay on the discrete variable structure control systems , and bring forward the design method of discrete variable structure control based on the system state forecast ; simulations show that the above solution avoids adverse influences for control - delay on the performance of variable structure control systems with control - delay , and control effect is fine
第三，本文以最简单的单输入离散系统为模型，分析讨论了控制量延迟对离散变结构控制系统的影响，提出了基于系统状态预测值的离散变结构控制设计方法；仿真表明该方法设计的具有控制滞后的变结构系统避免了控制量延迟对系统动静态的不利影响，控制效果良好。 - In this paper , the backward simulation was summarizd at home andabroad , the characteristics of shell nosing were introduced , the theory and scheme of backward simul - ation of shell nosing was constructed , the determined methods of the boundary conditions were put forward in backward simulation for the processes of shell nosing
论述了推力矢量控制技术是提高空空导弹性能的核心技术,介绍了常用的三类推力矢量装置,着重讨论了燃气舵式和扰流片式推矢装置的特点、设计方法、性能及其优缺点.在此基础上,研究了适用于气动力/推力矢量复合控制的变结构控制系统及其开关函数的切换条件和飞行控制系统框图.最后综述了推力矢量装置在第四代空空导弹上的应用情况 - Regarding the development of control system , we studied a non - linear control method , variable structure control method , elaborating the basic concepts , methods of design and the solution of buffeting problem , modelling the linearization variable of a certain turbofan engine , for which the variable structure control system was designed and verified by a great many simulations
就控制系统设计问题,本文主要研究了一种非线性的控制方法? ?变结构控制方法。阐述了变结构控制基本概念、设计方法和抖振问题的解决,建立了某涡扇发动机线性化状态变量模型,并为其设计了变结构控制系统。最后进行大量的仿真,以验证其有效性。