本文選題：網(wǎng)絡控制系統(tǒng) + 容錯控制��； 參考：《沈陽工業(yè)大學》2017年碩士論文

【摘要】：網(wǎng)絡控制系統(tǒng)(Networked Control Systems,NCSs)在遠程手術、無人機以及自動公路體系等許多領域具備廣泛的應用。但是,相對于傳統(tǒng)的控制體系,網(wǎng)絡不可避免地會帶來一些問題,如傳輸延遲和數(shù)據(jù)丟包等。同時,由于執(zhí)行器與傳感器節(jié)點要處理較多復雜的控制工作,極易發(fā)生失效故障,從而影響系統(tǒng)穩(wěn)定性。因而,NCSs的容錯控制具備很好的理論研討價值空間和現(xiàn)實背景。本文分別針對具備單邊丟包、雙邊丟包和不確定因素長時延NCSs,進行容錯控制研究。主要內(nèi)容如下:(1)對本文的研究背景、目的及意義進行了介紹,同時簡略介紹了NCSs存在的幾個主要問題,并介紹了一些相關預備知識。(2)研究存在傳感器-控制器鏈路數(shù)據(jù)丟包的長時延NCSs的容錯控制問題。在有無外界擾動向量的狀況下,分別進行執(zhí)行器失效時NCSs容錯控制器的設計。通過引入一類具備隨機性的開關矩陣,建立帶有隨機外界擾動向量的丟包長時延NCSs的增廣模型。應用?H控制理論,構建相應的Lyapunov函數(shù),經(jīng)過求解矩陣不等式獲得相應的狀態(tài)反饋控制器,并給出系統(tǒng)具備漸近穩(wěn)定性的充分條件。最后,經(jīng)過仿真算例結(jié)果驗證本章所得出的方法的可行性及有效性。(3)分別針對同時具備雙邊任意丟包、雙邊隨機丟包及時延大于一個采樣周期的NCSs,研究了NCSs的容錯控制問題。控制器-執(zhí)行器之間和傳感器-控制器之間的丟包過程分別被描述為具備兩個隨機切換的開關、兩個狀態(tài)的齊次Markov鏈。通過構建相應的Lyapunov函數(shù)設計狀態(tài)反饋控制器,得到執(zhí)行器失效時閉環(huán)系統(tǒng)穩(wěn)定的充分條件。仿真算例結(jié)果表明了容錯控制方式的可行性。(4)研究帶有長時延的不確定NCSs的容錯控制問題。考慮傳感器-控制器之間的數(shù)據(jù)包發(fā)生丟失對系統(tǒng)的影響,引入傳感器任意失效矩陣,建立具備不確定狀態(tài)的NCSs的增廣模型,結(jié)合Lyapunov方法,結(jié)合?H控制理論,給出NCSs對傳感器任意失效具備完整性、對不確定性因素具備魯棒穩(wěn)定性的充分條件。經(jīng)由仿真算例證實本章容錯控制的有效性。(5)概括本文的研究內(nèi)容,并對以后的研究作出展望。
[Abstract]:Networked Control Systems (NCSs) has been widely used in many fields, such as remote operation, UAV and automatic highway system.However, compared with the traditional control system, the network inevitably brings some problems, such as transmission delay and data packet loss.At the same time, because the actuator and sensor nodes have to deal with more complex control work, it is easy to fail, which affects the stability of the system.Therefore, the fault-tolerant control of NCSs has a good theoretical research value space and practical background.In this paper, fault-tolerant control is studied for NCSs with one-sided packet loss, bilateral packet loss and long delay of uncertainty.The main contents are as follows: (1) the research background, purpose and significance of this paper are introduced. At the same time, several main problems existing in NCSs are briefly introduced.The fault tolerant control problem of long delay NCSs with sensor controller link data loss is also introduced.The NCSs fault-tolerant controller with or without external disturbance vectors is designed for actuator failure.By introducing a random switching matrix, an augmented model of NCSs with long packet loss delay with random external disturbance vectors is established.The corresponding Lyapunov function is constructed by using the control theory of H, and the corresponding state feedback controller is obtained by solving matrix inequalities, and the sufficient conditions for the asymptotic stability of the system are given.Finally, the feasibility and effectiveness of the method presented in this chapter are verified by simulation examples. (3) the fault tolerant control problem of NCSs is studied for those NCSs with bilateral random packet loss and bilateral random packet loss with more than one sampling period.The packet loss process between controllers and actuators and between sensors and controllers is described as a homogeneous Markov chain with two random switches and two states.By constructing the corresponding Lyapunov function to design the state feedback controller, a sufficient condition for the stability of the closed-loop system when the actuator fails is obtained.The simulation results show that the fault-tolerant control method is feasible. 4) the fault-tolerant control problem of uncertain NCSs with long delay is studied.Considering the effect of packet loss between sensors and controllers on the system, an augmented model of NCSs with uncertain state is established by introducing any sensor failure matrix, combining with Lyapunov method and H control theory.Sufficient conditions for NCSs to have integrity for arbitrary failure of sensors and robust stability for uncertain factors are given.The effectiveness of fault-tolerant control in this chapter is verified by a simulation example.
【學位授予單位】：沈陽工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP273

【相似文獻】

相關期刊論文 前10條

1 張君昌,侯義斌,李言俊;基于知識熵漲落的系統(tǒng)智能容錯控制法[J];彈箭與制導學報;2000年02期

2 周東華,DingX;容錯控制理論及其應用[J];自動化學報;2000年06期

3 黃孝彬,牛玉廣,孫萬云;容錯控制及其在火電廠中的應用[J];電力情報;2000年04期

4 王敏,臧曙,周東華;非線性動態(tài)系統(tǒng)的容錯控制[J];計算技術與自動化;2004年04期

5 王峰;汪t，

本文編號：1735929