【摘要】：船用蝶閥液動執(zhí)行器作為閥門驅(qū)動器中眾多類型的一種,是驅(qū)動蝶閥的主要部件,其結(jié)構(gòu)特性、響應(yīng)速度及控制魯棒性直接影響蝶閥的使用性能。因此,船用蝶閥液動執(zhí)行器的設(shè)計(jì)及控制研究,對于保證船舶安全性及可靠性具有重要意義。本文以船用蝶閥液動執(zhí)行器為研究對象,將直驅(qū)式容積控制、聯(lián)合仿真及模糊控制策略相結(jié)合,實(shí)現(xiàn)對船用蝶閥液動執(zhí)行器的結(jié)構(gòu)優(yōu)化設(shè)計(jì)及控制響應(yīng)特性研究,深入探討了執(zhí)行器的關(guān)鍵元件參數(shù)和智能控制策略對液壓缸位移響應(yīng)時(shí)間的影響,具體研究工作如下:首先,針對船用蝶閥液動執(zhí)行器的特殊工況,設(shè)計(jì)了執(zhí)行器的液壓回路系統(tǒng)及機(jī)械結(jié)構(gòu),確定了控制方式;并對其中的關(guān)鍵部件,如液壓缸、伺服電機(jī)與液壓泵進(jìn)行了選型及設(shè)計(jì),對集成液壓閥塊與液壓管路進(jìn)行了相應(yīng)的研究;開發(fā)了船用蝶閥液動執(zhí)行器的虛擬樣機(jī),并試制了物理樣機(jī)。其次,在AMESim中建立了船用蝶閥液動執(zhí)行器的仿真模型,對系統(tǒng)中元件參數(shù)的設(shè)置及控制策略進(jìn)行了探討,得出了影響液壓缸位移響應(yīng)時(shí)間的關(guān)鍵要素;由仿真結(jié)果表明:伺服電機(jī)轉(zhuǎn)速、油液彈性模量、液壓管路及液壓泵轉(zhuǎn)動慣量對執(zhí)行器的位移響應(yīng)特性都有一定的影響,根據(jù)該結(jié)果對執(zhí)行器的參數(shù)進(jìn)行了相應(yīng)的調(diào)整優(yōu)化,并通過實(shí)驗(yàn)證實(shí)了優(yōu)化方法的可行性與合理性。最后,在AMESimMATLAB/Simlink的聯(lián)合仿真平臺下,搭建了船用蝶閥液動執(zhí)行器的控制系統(tǒng),分別采用無PID控制、常規(guī)PID控制及模糊控制三種控制方法,在輸入多種不同的控制信號下,通過聯(lián)合仿真比較這三種控制方法的優(yōu)缺點(diǎn)。仿真結(jié)果表明:模糊控制與另兩種控制方法相比較,對液動執(zhí)行器的液壓缸響應(yīng)更加迅速,并能及時(shí)修正在控制過程中產(chǎn)生的誤差量,所以模糊控制方法具有更好的魯棒性。本文研究的液動執(zhí)行器的控制系統(tǒng)采用了模糊控制方法,實(shí)現(xiàn)了對系統(tǒng)的智能控制。
[Abstract]:As one of many types of valve actuators, marine butterfly valve hydraulic actuator is the main component of butterfly valve drive. Its structure characteristics, response speed and control robustness directly affect the performance of butterfly valve. Therefore, the research on the design and control of the hydraulic actuator of the butterfly valve is of great significance to ensure the safety and reliability of the ship. This paper takes the marine butterfly valve hydraulic actuator as the research object, combines the direct drive volume control, the joint simulation and the fuzzy control strategy, realizes the structure optimization design and the control response characteristic research of the marine butterfly valve hydraulic actuator. The effects of key component parameters and intelligent control strategy of actuator on displacement response time of hydraulic cylinder are discussed in depth. The specific research work is as follows: firstly, in view of the special working conditions of the hydraulic actuator of marine butterfly valve, The hydraulic loop system and mechanical structure of actuator are designed, and the control mode is determined, and the key components, such as hydraulic cylinder, servo motor and hydraulic pump, are selected and designed. The integrated hydraulic valve block and hydraulic pipeline are studied, the virtual prototype of the hydraulic actuator of the butterfly valve is developed, and the physical prototype is trial-produced. Secondly, the simulation model of marine butterfly valve hydraulic actuator is established in AMESim, the setting of component parameters and control strategy in the system are discussed, and the key factors affecting the displacement response time of hydraulic cylinder are obtained. The simulation results show that the rotational speed of servo motor, the modulus of elasticity of oil, the moment of inertia of hydraulic pipe and hydraulic pump have certain influence on the displacement response characteristics of actuator. According to the result, the parameters of actuator are adjusted and optimized accordingly. The feasibility and rationality of the optimization method are verified by experiments. Finally, the control system of the marine butterfly valve hydraulic actuator is built on the platform of AMESimMATLAB/Simlink, which adopts three control methods: no PID control, conventional PID control and fuzzy control, under the input of many different control signals. The advantages and disadvantages of these three control methods are compared by joint simulation. The simulation results show that compared with the other two control methods, the fuzzy control can respond more quickly to the hydraulic cylinder of the hydraulic actuator, and can correct the error in the control process in time, so the fuzzy control method has better robustness. The control system of hydraulic actuator studied in this paper adopts fuzzy control method to realize the intelligent control of the system.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U664.84

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本文編號：2279860