發(fā)布時(shí)間：2019-01-22 09:26

【摘要】：無(wú)線網(wǎng)絡(luò)控制系統(tǒng)是近年來(lái)逐漸興起的一種以無(wú)線傳輸通信為基礎(chǔ)的分布式控制系統(tǒng)。它利用無(wú)線網(wǎng)絡(luò)把分布在不同位置的系統(tǒng)節(jié)點(diǎn)連接起來(lái),擺脫了控制系統(tǒng)對(duì)金屬傳輸介質(zhì)的依賴,具有成本低、維護(hù)方便,易于擴(kuò)展等優(yōu)點(diǎn)。但是由于無(wú)線網(wǎng)絡(luò)通信的脆弱性,數(shù)據(jù)傳輸延時(shí)、數(shù)據(jù)丟包等因素使無(wú)線網(wǎng)絡(luò)控制系統(tǒng)的控制器設(shè)計(jì)工作變得十分困難。PID控制器廣泛應(yīng)用于無(wú)線網(wǎng)絡(luò)控制系統(tǒng),它具有較強(qiáng)的魯棒性和通用性,且易于在工業(yè)控制系統(tǒng)中實(shí)現(xiàn)。本文以無(wú)線網(wǎng)絡(luò)控制系統(tǒng)為研究方向,以提高系統(tǒng)抗干擾性,降低網(wǎng)絡(luò)通信延遲對(duì)系統(tǒng)的負(fù)面影響為目的,探討了無(wú)線網(wǎng)絡(luò)控制系統(tǒng)的PID控制問題。首先,對(duì)影響無(wú)線網(wǎng)絡(luò)控制系統(tǒng)的基本因素進(jìn)行了詳細(xì)的闡述,并著重介紹了網(wǎng)絡(luò)時(shí)延這一主要影響因素,分析了時(shí)延對(duì)系統(tǒng)穩(wěn)定性的影響,驗(yàn)證了時(shí)延的疊加性。然后,介紹了內(nèi)模控制的相關(guān)基礎(chǔ)理論,構(gòu)建了具有PID控制器形式的IMC-PID控制器,把該控制器加入到無(wú)線網(wǎng)絡(luò)控制系統(tǒng),并利用粒子群算法對(duì)IMC-PID控制器引入的加權(quán)系數(shù)進(jìn)行尋優(yōu)。接著,分析了廣義預(yù)測(cè)控制的相關(guān)數(shù)學(xué)理論,研究了基于廣義預(yù)測(cè)控制的PID控制器,提出了改進(jìn)策略,并把控制器應(yīng)用于無(wú)線網(wǎng)絡(luò)控制系統(tǒng)。最后,對(duì)所研究的控制器進(jìn)行了仿真分析,仿真結(jié)果表明,采用粒子群優(yōu)化的IMC-PID控制器和改進(jìn)后的基于廣義預(yù)測(cè)的PID控制器都具有較強(qiáng)的魯棒性,降低了系統(tǒng)的超調(diào)量,抑制了干擾作用,能夠?qū)W(wǎng)絡(luò)時(shí)延進(jìn)行補(bǔ)償。從而提高了無(wú)線網(wǎng)絡(luò)控制系統(tǒng)的控制質(zhì)量。
[Abstract]:Wireless network control system (WNCS) is a distributed control system based on wireless transmission and communication. It uses the wireless network to connect the nodes distributed in different locations, and gets rid of the dependence of the control system on the metal transmission medium. It has the advantages of low cost, convenient maintenance and easy expansion. However, due to the fragility of wireless network communication, data transmission delay, data packet loss and other factors, the controller design of wireless network control system becomes very difficult. PID controller is widely used in wireless network control system. It has strong robustness and generality, and is easy to be realized in industrial control system. In order to improve the system anti-jamming and reduce the negative influence of network communication delay, this paper discusses the PID control problem of wireless network control system in the research direction of wireless network control system. Firstly, the basic factors affecting the wireless networked control system are described in detail, and the network delay is introduced in detail. The influence of the delay on the stability of the system is analyzed, and the superposition of the delay is verified. Then, the basic theory of internal model control is introduced, and the IMC-PID controller with the form of PID controller is constructed, and the controller is added to the wireless network control system. Particle swarm optimization algorithm is used to optimize the weighting coefficient introduced by IMC-PID controller. Then, the related mathematical theory of generalized predictive control is analyzed, the PID controller based on generalized predictive control is studied, the improved strategy is proposed, and the controller is applied to wireless network control system. Finally, the simulation results show that both the IMC-PID controller based on particle swarm optimization and the improved PID controller based on generalized prediction have strong robustness and reduce the overshoot of the system. The interference is suppressed and the network delay can be compensated. Thus, the control quality of wireless network control system is improved.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP273

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本文編號(hào)：2413080