本文選題：船舶柴油機(jī)　切入點(diǎn)：冷卻水　出處：《上海交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：船舶柴油機(jī)冷卻水溫度控制系統(tǒng)是船舶機(jī)艙過程控制系統(tǒng)的重要組成部分,是保證船舶動(dòng)力裝置安全可靠運(yùn)行的重要系統(tǒng)之一。同時(shí),冷卻水系統(tǒng)的冷卻水溫將直接影響主、輔機(jī)和機(jī)械系統(tǒng)運(yùn)行效率。為了使缸套冷卻水出機(jī)溫度的控制更加穩(wěn)定可靠、適應(yīng)性強(qiáng),并具有較高的控制精度,需對(duì)系統(tǒng)溫度控制器的控制方法進(jìn)行深入研究。目前船舶機(jī)艙中的冷卻水溫度控制系統(tǒng)大多采用常規(guī)PID控制,但是由于冷卻水溫度控制系統(tǒng)是一個(gè)回路閉環(huán)系統(tǒng),具有非線性、時(shí)變性、大遲延等特點(diǎn),傳統(tǒng)的PID在某些情況下難以達(dá)到理想的控制效果。為了提高船舶的管理水平,降低運(yùn)營成本,提高船舶運(yùn)營的安全性、可靠性和經(jīng)濟(jì)性,在真正意義上實(shí)現(xiàn)機(jī)艙綜合自動(dòng)化,有必要對(duì)先進(jìn)控制技術(shù)在機(jī)艙過程控制中的應(yīng)用進(jìn)行探索和研究。本文從所建造船舶的柴油機(jī)冷卻水控制系統(tǒng)著手,研究了船舶柴油機(jī)冷卻水系統(tǒng)熱力學(xué)模型和溫控系統(tǒng),對(duì)現(xiàn)有船舶所使用的PID溫控閥控制進(jìn)行了分析;同時(shí)通過了解魯棒控制理論,對(duì)船舶柴油機(jī)冷卻水溫度控制系統(tǒng)進(jìn)行了∞H控制器的設(shè)計(jì)及仿真分析,通過仿真發(fā)現(xiàn)在沒有參數(shù)攝動(dòng)情況下∞H最優(yōu)控制器使系統(tǒng)穩(wěn)定的時(shí)間比PID控制器使系統(tǒng)穩(wěn)定的時(shí)間要短,而且振幅小。當(dāng)模型參數(shù)發(fā)生較小攝動(dòng)時(shí),雖然∞H狀態(tài)反饋控制和PID控制都能使系統(tǒng)穩(wěn)定,但PID控制明顯使系統(tǒng)性能下降,表現(xiàn)在穩(wěn)定時(shí)間變長。當(dāng)攝動(dòng)達(dá)到一定量時(shí),PID控制系統(tǒng)不再穩(wěn)定,而∞H狀態(tài)反饋控制能使系統(tǒng)保持良好的穩(wěn)定狀態(tài)。緊接著分析了主機(jī)冷卻水溫度控制系統(tǒng)機(jī)械參數(shù)在某個(gè)范圍攝動(dòng)時(shí)系統(tǒng)的輸出響應(yīng),仿真結(jié)果顯示∞H控制器都能使系統(tǒng)回到平衡狀態(tài),因此∞H控制比PID控制具有更強(qiáng)的魯棒穩(wěn)定性和抗干擾能力。
[Abstract]:The cooling water temperature control system of marine diesel engine is an important part of ship engine room process control system and one of the important systems to ensure the safe and reliable operation of marine power plant. At the same time, the cooling water temperature of the cooling water system will directly affect the main body. In order to make the temperature control of the cylinder liner cooling water outlet machine more stable and reliable, strong adaptability, and has a higher control accuracy, It is necessary to study the control method of the system temperature controller. At present, the cooling water temperature control system in ship engine room mostly adopts the conventional PID control, but the cooling water temperature control system is a loop closed loop system, which is nonlinear. In order to improve the management level of the ship, reduce the operating cost and improve the safety, reliability and economy of the ship operation, the traditional PID is difficult to achieve the ideal control effect under some circumstances. It is necessary to explore and study the application of advanced control technology in engine room process control. The thermodynamic model and temperature control system of marine diesel engine cooling water system are studied, and the PID temperature control valve control used in existing ships is analyzed. The design and simulation analysis of 鈭，

本文編號(hào)：1605668