本文選題：網(wǎng)絡(luò)化控制系統(tǒng)　切入點：量化　出處：《湖北師范大學》2017年碩士論文　論文類型：學位論文

【摘要】：隨著通信網(wǎng)絡(luò)技術(shù)的發(fā)展,網(wǎng)絡(luò)被引入到控制系統(tǒng)并成為了當下的一個重要的話題。在實際生活應(yīng)用環(huán)境中,網(wǎng)絡(luò)化控制系統(tǒng)是通過使用通信網(wǎng)絡(luò)將位于不同空間、地理位置上的物理設(shè)備連接起來的一種通信系統(tǒng),從而實現(xiàn)信息的相互傳遞,具備方便、快捷、易于傳輸和維護等優(yōu)點。然而網(wǎng)絡(luò)化控制系統(tǒng)在為生活帶來便利的同時自身也面臨著一系列新的問題:由于網(wǎng)絡(luò)自身的特性,信號在網(wǎng)絡(luò)中傳輸時可能出現(xiàn)數(shù)據(jù)丟失、量化、時延以及噪聲、帶寬約束等,我們將這些約束稱為網(wǎng)絡(luò)參數(shù)約束。當網(wǎng)絡(luò)化控制系統(tǒng)出現(xiàn)這些參數(shù)約束時,其性能也將會遭到很大破壞,有時甚至會使得系統(tǒng)失穩(wěn)。因此本文的工作是考慮丟包存在于信道時的網(wǎng)絡(luò)化控制系統(tǒng)性能極限情況,并同時考慮其它參數(shù)存在時對系統(tǒng)性能極限的共同影響。具體內(nèi)容如下:在網(wǎng)絡(luò)化控制系統(tǒng)的性能研究中,鑒于目前對量化和丟包同時存在于信道的研究還少有涉及,因此考慮前向通道中存在量化約束以及反饋通道存在丟包約束的網(wǎng)絡(luò)化控制系統(tǒng)跟蹤性能極限問題。從獲得的結(jié)論可以看出網(wǎng)絡(luò)化控制系統(tǒng)跟蹤性能極限和給定對象的內(nèi)部特性(非最小相位零點位置和不穩(wěn)定極點位置)以及量化間隔、丟包有關(guān)。結(jié)果也表明了量化間隔和丟包是怎樣從根本上約束著系統(tǒng)的跟蹤性能極限的。在目前研究網(wǎng)絡(luò)化控制系統(tǒng)性能的很多文獻中,為了確保跟蹤性能的有效性,往往假定了被控對象至少含有一個積分器,但是在實際應(yīng)用中,若被控對象不含積分器,則得到的系統(tǒng)性能就是無效的,也就是說使用先前的性能指標來分析不含積分器的系統(tǒng)是不合理的,那么在此種情況下就需要采用一種新的修改性能指標。此外,信道中時延和丟包的同時存在以及信道輸入能量約束也將會對控制系統(tǒng)的性能極限產(chǎn)生很大的影響,而之前對以上網(wǎng)絡(luò)參數(shù)在信道中同時存在的研究還少有涉及。因此在基于丟包約束的基礎(chǔ)上同時分析網(wǎng)絡(luò)信道輸入能量的限制進而考慮網(wǎng)絡(luò)化時滯系統(tǒng)修改跟蹤性能極限問題。獲得的結(jié)論說明了時滯系統(tǒng)修改跟蹤性能極限和被控對象的非最小相位零點位置、不穩(wěn)定極點位置以及時延等內(nèi)部特性是息息有關(guān)的。同時研究結(jié)果還表明修改因子、數(shù)據(jù)包丟失也對時滯系統(tǒng)的修改跟蹤性能極限產(chǎn)生著非常大的影響。在現(xiàn)實生活的實際應(yīng)用中,網(wǎng)絡(luò)通信的帶寬不可能是無限的。當丟包和帶寬約束同時存在于通信信道時,系統(tǒng)性能將受到很大影響。所以基于數(shù)據(jù)包丟失和信道帶寬受限的共同約束,采用修改跟蹤性能指標來討論控制系統(tǒng)修改跟蹤性能極限問題就是很有必要的。從獲得的結(jié)論能夠看出,系統(tǒng)修改跟蹤性能與給定對象的非最小相位零點位置、不穩(wěn)定極點位置還有它們的方向是息息相關(guān)的。另外,從結(jié)果也可以看出,修改因子、帶寬、丟包以及信道輸入能量對系統(tǒng)的修改跟蹤性能極限也有很大的影響。
[Abstract]:With the development of network technology, network is introduced into the control system and has become an important topic of the moment. In real life applications, the network control system is through the use of communication network will be located in the same space, a communication system physical device geographically connected together, so as to realize the information mutual transfer, with convenient, fast, easy transmission and maintenance. However, the networked control system for the convenience of life itself is also facing a series of new problems: because the network characteristics, data loss, may signal is transmitted in the network delay and quantization noise, bandwidth constraints etc. we will, these constraints are called network parameter constraints. When the network control system of these conditions, its performance will suffer enormous damage, sometimes even makes the system unstable. The work of this paper is to consider the network packet loss in channel control system performance limit, and at the same time considering the common effect on the system performance limits of other parameters exist. The specific contents are as follows: in the network performance of the control system, in view of the current research on quantization and packet loss also exists in the channel is less to consider therefore exists in the forward channel of the tracking performance limitations of network system and feedback channel quantization constraint constraint dropout control. The conclusion can be seen from the network control system of tracking limit and internal characteristics of the given object (non minimum phase zero position and unstable pole position) and quantization interval, packet loss the results also indicated that the quantization interval and packet loss is how to fundamentally constrain the tracking performance limit of the system. In the current research of network control A lot of literature system performance, in order to ensure the effectiveness of tracking performance, we tend to assume that the object contains at least one integrator, but in practical application, if the object does not contain the integrator, then the system performance is invalid, that is to analyze the system without integrator is not reasonable use before the first performance, so in this case you need to adopt a new performance index. In addition, time delay and packet loss channels exist at the same time and channel input energy constraint on the control system performance will also limit influence, and prior to the above research on network parameters existed in the same channel. There are less involved. So at the same time analysis network channel input energy based on packet loss constraints limit on the network delay and then consider the system to modify the tracking performance limitations. The results show that the time delay system to modify the non minimum phase zero position tracking performance and the limit of the controlled object, unstable internal characteristics of pole position and time delay are closely related. The results also showed that the modification factor, packet loss of time delay system modification of tracking performance limitations have a very big impact. In practical life, the bandwidth of network communication is not limitless. When the packet loss and bandwidth constraints also exist in the communication channel, the system performance will be greatly affected. So based on common constraint packet loss and limited channel bandwidth, the change tracking performance index to discuss the control system modifies the tracking performance limitations it is very necessary. From the conclusion that the system modify the non minimum phase zero position tracking performance with a given object, unstable poles Location is also closely related to their direction. In addition, from the result, we can see that modifying factors, bandwidth, packet loss and channel input energy have great influence on the system's modification and tracking performance limit.

【學位授予單位】：湖北師范大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP273

【參考文獻】

相關(guān)期刊論文 前6條

1 邢江;關(guān)治洪;;網(wǎng)絡(luò)化控制系統(tǒng)的研究現(xiàn)狀與展望[J];控制工程;2006年04期

2 吳杰;詹習生;徐唐河;張先鶴;;基于通信約束的網(wǎng)絡(luò)化控制系統(tǒng)最優(yōu)性能研究[J];信息與控制;2012年06期

3 孫曉嶺;楊麗蕓;鮑冬冬;仇計清;;時滯網(wǎng)絡(luò)化控制系統(tǒng)的魯棒H_∞穩(wěn)定性分析[J];河北科技大學學報;2013年04期

4 羅毅平;周筆鋒;;時滯擴散性復雜網(wǎng)絡(luò)同步保性能控制[J];自動化學報;2015年01期

5 張文安;劉凱;俞立;董輝;;基于自抗擾技術(shù)的網(wǎng)絡(luò)化無刷直流電機控制系統(tǒng)時延補償[J];控制與決策;2015年11期

6 WANG RongXi;GAO JianMin;GAO ZhiYong;GAO Xu;JIANG HongQuan;;Complex network theory-based condition recognition of electromechanical system in process industry[J];Science China(Technological Sciences);2016年04期

相關(guān)博士學位論文 前2條

1 池明;網(wǎng)絡(luò)環(huán)境下的反饋控制系統(tǒng)最優(yōu)跟蹤性能分析[D];華中科技大學;2013年

2 詹習生;基于通信約束的網(wǎng)絡(luò)化控制系統(tǒng)最優(yōu)性能研究[D];華中科技大學;2012年

相關(guān)碩士學位論文 前1條

1 孫鑫翔;通信受限下網(wǎng)絡(luò)化控制系統(tǒng)性能極限分析[D];湖北師范大學;2016年

，

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