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The mathematical model of diesel engine speed control system


9.55 blue: 9.55: J. iT. ~ 2Psin (0 + △) 9.55 ・\value, in the power angle is not the time to reach equilibrium conditions, △ n play, 0 = 0 + △ n, after oscillation, △ n = 0,0 (12) can be used for the calculation of dynamic analysis. the engine speed and crankshaft the relationship between the angular velocity of 2 generations of equation (6) may, Lu and other n = M + A M: Ju odd one: so =,, =, etc., then the equation (14) into the Police + = Ml-M2 of the type (15 ) discrete differential equation, we can get diesel generator differential equation + = M 【a M2 + = + j (acridine one by one) skill (7). (12), (17) Simultaneous up. to get diesel power unit difference equation! .= n + = n + (Ⅳ - a Ⅳ A n) (= 1,2, ..., fl2) given the number 0. Equation (13) (14) (15) (16) (17) ( 1 Dark Harbin Engineering University Vol 18 3 diesel engine speed control system schematic diagram shown in Figure 1. diesel engine speed control system from the diesel engine,[link widoczny dla zalogowanych], generator, electronic governor, fuel pump and oil institutions ix. load speed for a given plant ------] r ------ --- j-_ a plant two hundred twenty-two electronic governor ÷ I-diesel engine fuel injection spring {Generators Bu ---- ----,,...... 【......,...,, Il Figure 1 Diesel engine speed control system diagram system works, that the speed of the system to be three basic Yasumasa function of the realization: (1) load increases, the resistance increases torque, rotational speed n drop action to achieve slow growth of oil regulation; (2) load reduction, reduced resistance torque,[link widoczny dla zalogowanych], rotational speed n increases, adjust the action to achieve growth rate of base oil; ( 3) load the same, the main drag torque and torque balance, supply of electronic governor to maintain the same differential equations and diesel generator sets of differential equations end up, to get diesel engine speed control system of differential equations, in the form of Head for the 2000l5oo looo Ⅳ I. = n + b. a aL (= 1,2, ..., li,) Ⅳ, + (Ⅳ 1. a 2rn-K1fl,[link widoczny dla zalogowanych], an Ir-Klfl, r-Klfl,[link widoczny dla zalogowanych], + lTbn) (i = 1 , 2, ..., li ,):.++)] K, l +6 (19) Figure 2 50% sudden load dynamic characteristics of Figure 3 to 100% sudden load the dynamic characteristics of the system fall ‰ delete delete i. \ No. 6 Huangman Lei et al: recite speed diesel engine system model 25 generations in the above equation, the necessary parameters, we can carry out computer simulation to study the dynamic characteristics of diesel engine speed control system of the frontier to find their 4 Simulation results the actual speed of a diesel engine hood system for the small computer simulation, Figure 2 and 5 were suddenly given the small system in 2000 -, I1500F ~ ~ \ a ---- I [x】 O-l500 ..__- 246820001500119005002468 Figure 4 50% sudden load reduction of the dynamic characteristics of the system 1 \100% load, the engine speed drops quickly to restore the minimum oscillation gradually increased to the extent required by the system's transient speed transfer rate is a sudden reduction in the transient oscillations 100% load, the engine speed quickly h rose to the maximum oscillation gradually decreased back to the specified range, the transient oscillation speed transfer rate is also a transition process. As the role of governor, speed by 7.8%, settling time T = 2.0s This role of the governor,[link widoczny dla zalogowanych], after a 8.3% speed, settling time T = 2.1s, the computer simulation results show that the proposed model is reasonable and feasible, reflect the actual engine speed System Reference Shaojia Ji situation. engine speed automatic control, Beijing: People pull traffic out of Society, 1990 High Country right. Power Diesel Engine Control System. Beijing: Fanmin Communications Press, l983 Shen Shande. Power system identification Beijing: Tsinghua University Press, much before 1993, paragraph. praise orange box parallel operation of diesel generators and adjust Beijing: National Defence Industry Press, 1988, Jinan Diesel Engine Factory Code 190 series diesel engine use and maintenance of Beijing: Mechanical Industry Press .1991 Huang Jiayu. Cen Wenhui basic theory of synchronous motor Dynamic behavior analysis. Shanghai: Shanghai Jiaotong University Press, 1989

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