本文關(guān)鍵詞： 空調(diào)系統(tǒng) 建模 切換控制 最優(yōu)控制　出處：《沈陽工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：本文以暖通空調(diào)系統(tǒng)為研究對象,深入地研究了空調(diào)系統(tǒng)的建模及控制器設(shè)計(jì)。在空調(diào)系統(tǒng)中,對蒸發(fā)溫度和過熱度的控制是其控制的重要環(huán)節(jié),實(shí)現(xiàn)對蒸發(fā)溫度和過熱度的快速及穩(wěn)定控制也是實(shí)現(xiàn)空調(diào)系統(tǒng)高效節(jié)能運(yùn)行的關(guān)鍵。首先,本論文詳細(xì)地分析了空調(diào)系統(tǒng)的基本工作原理,建立了空調(diào)制冷系統(tǒng)的5階非線性動態(tài)集中參數(shù)模型。并對所建立的空調(diào)制冷系統(tǒng)非線性模型在選定的工作點(diǎn)處進(jìn)行了線性化。為避免單一工作點(diǎn)處線性化產(chǎn)生的建模誤差而造成控制效果差的問題,本課題采用了切換控制的基本思想,對建立的空調(diào)制冷系統(tǒng)的非線性模型選擇在多個工作點(diǎn)處進(jìn)行線性化處理,從而得到了一組空調(diào)控制系統(tǒng)的線性狀態(tài)空間模型。然后,分別對描述空調(diào)切換系統(tǒng)的每個線性子模型設(shè)計(jì)了狀態(tài)調(diào)節(jié)的線性二次型最優(yōu)控制器,并根據(jù)實(shí)際系統(tǒng)的運(yùn)行情況,設(shè)計(jì)了空調(diào)系統(tǒng)切換控制的切換規(guī)則。為保證控制系統(tǒng)在任意切換下能夠穩(wěn)定運(yùn)行,本文利用共同李雅普諾夫方法驗(yàn)證了系統(tǒng)在任意切換下的穩(wěn)定性,從而完成了空調(diào)系統(tǒng)切換最優(yōu)控制器的設(shè)計(jì)。最后,為了驗(yàn)證對建立的空調(diào)系統(tǒng)2輸入(膨脹閥開度和壓縮機(jī)轉(zhuǎn)速)2輸出(蒸發(fā)溫度和過熱度)模型所設(shè)計(jì)的控制器的控制效果,本文基于MATLAB仿真軟件,對空調(diào)控制系統(tǒng)在多種工況下進(jìn)行了仿真分析。仿真結(jié)果表明,控制系統(tǒng)實(shí)現(xiàn)了在多個控制器切換運(yùn)行下的調(diào)節(jié)控制,取得了良好的控制效果,證實(shí)了切換控制器的有效性。
[Abstract]:Taking HVAC system as the research object, the modeling and controller design of HVAC system are deeply studied in this paper. In the air conditioning system, the control of evaporation temperature and superheat is an important part of the control. To realize the fast and stable control of evaporation temperature and superheat is also the key to realize the high efficiency and energy saving operation of the air conditioning system. Firstly, the basic working principle of the air conditioning system is analyzed in detail in this paper. The fifth order nonlinear dynamic centralized parameter model of air-conditioning refrigeration system is established, and the nonlinear model of air-conditioning refrigeration system is linearized at the selected working point to avoid the linearization of the single working point. The problem of poor control effect caused by the modeling error of. In this paper, the basic idea of switching control is adopted. The nonlinear model of air-conditioning refrigeration system is linearized at multiple working points, and a group of linear state space models of air conditioning control system are obtained. A linear quadratic optimal controller is designed for each linear submodel describing the air conditioning switching system, and according to the actual operation of the system, a linear quadratic optimal controller is designed. In order to ensure the stable operation of the control system under arbitrary switching, the common Lyapunov method is used to verify the stability of the system under arbitrary switching. In order to complete the design of the optimal controller for air conditioning system switching. Finally, In order to verify the control effect of the controller designed for the established model of the air conditioning system 2 input (expansion valve opening and compressor speed output) (evaporation temperature and superheat), this paper is based on MATLAB simulation software. The simulation analysis of air conditioning control system under various operating conditions shows that the control system realizes the adjustment control under the switching operation of multiple controllers and achieves good control effect. The effectiveness of the switching controller is verified.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP273;TB657.2

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