本文關(guān)鍵詞：改進全局滑�？刂萍皯�(yīng)用研究　出處：《天津工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 全局滑模控制 指數(shù)函數(shù) 線性滑模 全局魯棒性 離散

【摘要】：滑模變結(jié)構(gòu)控制作為現(xiàn)代控制理論中的重要分支之一,以其物理實現(xiàn)簡單、對系統(tǒng)內(nèi)部參數(shù)的不確定性以及外部干擾不敏感的優(yōu)點在線性系統(tǒng)和非線性系統(tǒng)的控制中得到了廣泛應(yīng)用。傳統(tǒng)滑模控制的響應(yīng)可分為趨近模態(tài)和滑動模態(tài),然而系統(tǒng)對于不確定性的魯棒性只體現(xiàn)在滑動模態(tài),也就是并不具有全程的魯棒性。全局滑模控制方法通過引進全程時變因子使系統(tǒng)從一開始便落到滑模切換面上從而實現(xiàn)了被控系統(tǒng)的全程魯棒性,但是在全局滑模切換面的演變過程中只有時間趨近于無窮時才能實現(xiàn)完全轉(zhuǎn)變。本文針對全局滑模控制中所出現(xiàn)的動態(tài)滑模面不能在有限時間內(nèi)演變?yōu)閭鹘y(tǒng)線性滑模面的缺點,提出了一種改進的全局滑�？刂撇呗�,所設(shè)計的動態(tài)滑模切換面中的非線性函數(shù)將普通全局切換面中的單項衰減函數(shù)替換為三項一階可導(dǎo)的指數(shù)衰減函數(shù)的和,設(shè)計出的新函數(shù)能在指定時刻衰減為0,從而保證了有限時間內(nèi)滑模切換面向傳統(tǒng)線性切換面的轉(zhuǎn)換,在保證系統(tǒng)全局魯棒性的基礎(chǔ)上有效減少了過渡時間,從而能加快系統(tǒng)的動態(tài)響應(yīng)速度,縮短收斂時間。以n階不確定連續(xù)系統(tǒng)為被控對象設(shè)計了改進的等效全局滑�？刂坡�,并選取Lyapunov函數(shù)對其控制器的穩(wěn)定性進行證明。為驗證本文所提出的控制策略在實際中的應(yīng)用,將所設(shè)計的改進全局滑�？刂坡蓱�(yīng)用到電力系統(tǒng)的混沌控制以及不確定性遲滯混沌神經(jīng)元/網(wǎng)絡(luò)與確定性遲滯混沌神經(jīng)元/網(wǎng)絡(luò)的同步控制中,并通過對比仿真實驗分別驗證了本文所提方法相較于普通全局滑模控制方法的優(yōu)越性。在被控對象為連續(xù)系統(tǒng)的基礎(chǔ)上進一步探索,將本文所提方法應(yīng)用到離散時間系統(tǒng)中,重新構(gòu)造了離散形式的衰減函數(shù),并設(shè)計了基于指數(shù)離散趨近律的改進全局滑模控制律,通過仿真實驗同樣驗證了其可行性。
[Abstract]:Sliding mode variable structure control is one of the important branches of modern control theory. The advantages of indeterminacy of internal parameters and insensitivity to external disturbances are widely used in the control of linear and nonlinear systems. The response of traditional sliding mode control can be divided into approaching mode and sliding mode. However, the robustness of the system to uncertainty is only reflected in the sliding mode. The global sliding mode control method can make the system fall to the sliding mode switching surface from the beginning by introducing the global time-varying factor to achieve the global robustness of the controlled system. However, in the evolution of the global sliding mode switching surface, only when the time approaches infinity, can complete transformation be realized. In this paper, the dynamic sliding mode surface in the global sliding mode control can not evolve into the traditional linear in finite time. The disadvantage of sliding mode surface. An improved global sliding mode control strategy is proposed in which the nonlinear function in the dynamic sliding mode switching surface is designed to replace the single attenuation function in the general global switching surface with the sum of the three first order differentiable exponential attenuation functions. The designed new function can attenuate to 0 at the specified time, thus ensuring the transition of sliding mode switching to the traditional linear switching surface in finite time, and effectively reducing the transition time on the basis of ensuring the global robustness of the system. Thus the dynamic response speed of the system can be accelerated and the convergence time can be shortened. An improved equivalent global sliding mode control law is designed for the n-order uncertain continuous system. The Lyapunov function is selected to prove the stability of the controller, and to verify the application of the proposed control strategy in practice. The improved global sliding mode control law is applied to chaos control of power system and synchronization control of uncertain delayed chaotic neuron / network and deterministic hysteresis chaotic neuron / network. The superiority of the proposed method compared with the conventional global sliding mode control method is verified by the comparative simulation experiments. Further exploration is made on the basis of the controlled object being a continuous system. The method proposed in this paper is applied to discrete time systems, and the attenuation function in discrete form is re-constructed, and an improved global sliding mode control law based on exponential discrete approach law is designed. The feasibility is also verified by simulation experiments.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP273

【參考文獻】

相關(guān)期刊論文 前10條

1 梁瀟;方勇純;孫寧;;平面四旋翼無人飛行器運送系統(tǒng)的軌跡規(guī)劃與跟蹤控制器設(shè)計[J];控制理論與應(yīng)用;2015年11期

2 Yao Peng;Wang Honglun;Su Zikang;;UAV feasible path planning based on disturbed fluid and trajectory propagation[J];Chinese Journal of Aeronautics;2015年04期

3 陳強;南余榮;邢科新;;基于擴張狀態(tài)觀測器的永磁同步電機混沌系統(tǒng)自適應(yīng)滑�？刂芠J];物理學(xué)報;2014年22期

4 鄧永停;李洪文;王建立;賈建祿;;基于卡爾曼濾波器的交流伺服系統(tǒng)自適應(yīng)滑�？刂芠J];光學(xué)精密工程;2014年08期

5 尹忠剛;李東;鐘彥儒;劉靜;;基于全局趨近律滑模的感應(yīng)電機控制方法[J];電氣傳動;2014年07期

6 呂品;賴際舟;楊天雨;劉建業(yè);朱斌;宋亦凡;;基于氣動模型輔助的四旋翼飛行器室內(nèi)自主導(dǎo)航方法[J];航空學(xué)報;2015年04期

7 何勇靈;陳彥民;周岷峰;;四旋翼飛行器在風場擾動下的建模與控制[J];中國慣性技術(shù)學(xué)報;2013年05期

8 汪紹華;楊瑩;;基于卡爾曼濾波的四旋翼飛行器姿態(tài)估計和控制算法研究(英文)[J];控制理論與應(yīng)用;2013年09期

9 倪駿康;劉崇新;龐霞;;電力系統(tǒng)混沌振蕩的等效快速終端模糊滑模控制[J];物理學(xué)報;2013年19期

10 袁雷;沈建清;肖飛;陳明亮;;插入式永磁低速同步電機非奇異終端滑模觀測器設(shè)計[J];物理學(xué)報;2013年03期

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