【摘要】：網(wǎng)絡(luò)控制系統(tǒng)將控制器、執(zhí)行器、傳感器等重要元器件通過互聯(lián)網(wǎng)相互連接,通過網(wǎng)絡(luò)進(jìn)行傳輸信號(hào)和數(shù)據(jù),改變了傳統(tǒng)控制系統(tǒng)點(diǎn)對(duì)點(diǎn)的連接方式,從而避免了在各部件之間鋪設(shè)專線,解決了傳統(tǒng)控制系統(tǒng)成本高、后期檢修難的問題。目前網(wǎng)絡(luò)控制系統(tǒng)已經(jīng)應(yīng)用于多個(gè)領(lǐng)域,如航空航天、交通運(yùn)輸、電力傳送等。然而,網(wǎng)絡(luò)控制系統(tǒng)將元件連入通信互聯(lián)網(wǎng),又不可避免地帶來了新問題:如網(wǎng)絡(luò)時(shí)延、數(shù)據(jù)包丟失等。本文分別針對(duì)具有外界干擾、參數(shù)不確定等情況下的線性離散網(wǎng)絡(luò)控制系統(tǒng),在具有時(shí)延和丟包的網(wǎng)絡(luò)環(huán)境下,研究了使系統(tǒng)穩(wěn)定的控制問題。主要研究?jī)?nèi)容如下:(1)針對(duì)一類具有外界干擾的線性時(shí)不變的網(wǎng)絡(luò)化控制系統(tǒng),設(shè)計(jì)使得閉環(huán)系統(tǒng)均方意義下指數(shù)穩(wěn)定的H∞狀態(tài)反饋控制器。已知系統(tǒng)從傳感器到控制器之間具有時(shí)變時(shí)延和數(shù)據(jù)包丟失,控制器到執(zhí)行器之間具有時(shí)變時(shí)延。假設(shè)網(wǎng)絡(luò)誘導(dǎo)總時(shí)延為短時(shí)延。使用概率已知的Bernoulli隨機(jī)序列描述丟包過程。選擇合適的Lyapunov函數(shù),根據(jù)Lyapunov原理,經(jīng)過推導(dǎo)得到控制器存在的充分條件,再利用LMI方法將該方程轉(zhuǎn)換成線性矩陣不等式。最后的仿真說明了設(shè)計(jì)的控制器是有效的。(2)針對(duì)一類參數(shù)不確定線性時(shí)不變離散網(wǎng)絡(luò)控制系統(tǒng),考慮網(wǎng)絡(luò)控制環(huán)境下存在的網(wǎng)絡(luò)誘導(dǎo)時(shí)延、數(shù)據(jù)丟包、外部擾動(dòng)和系統(tǒng)參數(shù)不確定等復(fù)雜因素,設(shè)計(jì)使NCS穩(wěn)定的H∞狀態(tài)反饋控制器�？紤]系統(tǒng)在傳感器到控制器之間以及控制器到執(zhí)行器之間存在丟包,將具有確定性丟包過程的通訊網(wǎng)絡(luò)看作以一定概率切換的開關(guān),從而將NCS的模型定義為具有4種情況的異步動(dòng)態(tài)系統(tǒng)。根據(jù)Lyapunov原理和LMI方法計(jì)算得到控制器存在的充分條件。最后的仿真說明了設(shè)計(jì)的控制器是有效的。(3)針對(duì)一類具有時(shí)變參數(shù)的線性離散網(wǎng)絡(luò)控制系統(tǒng),設(shè)計(jì)基于觀測(cè)器的H∞狀態(tài)反饋控制器。假設(shè)系統(tǒng)在傳感器與控制器之間存在時(shí)變時(shí)延,控制器與執(zhí)行器之間既有時(shí)變時(shí)延又存在丟包,其中,丟包滿足Bernoulli隨機(jī)序列�；贚MI和Lyapunov穩(wěn)定性理論,推導(dǎo)得到控制器存在的充分條件。最后的仿真說明了設(shè)計(jì)的控制器是有效的。
[Abstract]:The network control system connects the controllers, actuators, sensors and other important components to each other through the Internet and transmits signals and data through the network, which changes the traditional point-to-point connection mode of the control system. Thus avoiding the laying of special lines among the components, solving the problems of high cost and difficult maintenance of the traditional control system. Network control system has been used in many fields, such as aerospace, transportation, power transmission and so on. However, the network control system connects the components to the communication Internet, which inevitably brings new problems, such as network delay, data packet loss and so on. In this paper, for linear discrete networked control systems with external disturbances and uncertain parameters, the stability of the system is studied under the network environment with delay and packet loss. The main research contents are as follows: (1) for a class of linear time-invariant networked control systems with external disturbances, an H _ 鈭，

本文編號(hào)：2364451