【作者】 杨（？）虓；

【导师】 宋蛰存；

【作者基本信息】 东北林业大学 ， 控制理论与控制工程， 2004， 硕士

【摘要】 电控变截面涡轮增压系统，可充分利用柴油机的废气能量，克服常规增压存在的低速扭矩不足、部分负荷经济性差和瞬态响应迟缓的问题，能在不改变高转速性能的同时，改善低速性能，在增压柴油机全工况范围内进行调节，提高发动机功率、改善燃料经济性，对降低内燃机的污染、噪声也有积极影响。电控可变喷嘴涡轮增压器已成为当今世界涡轮增压行业的最新发展趋势。本文以涡轮增压柴油机为研究对象，在MATLAB／SIMULINK仿真环境下建立电控可变喷嘴涡轮增压柴油机的动力学模型，对电控变截面涡轮增压柴油机的性能、控制方法和控制参数进行研究。 首先，对变截面涡轮增压器与柴油机的匹配要求作了说明，分析了变截面涡轮增压器的喷嘴环叶片转角与发动机各参数的关系。然后，介绍了PID控制方法及适合于对变截面涡轮增压器进行控制的数字增量式PID控制法。接着介绍计算机仿真技术及MATLAB仿真工具。MATLAB非常适用于控制理论的探讨与仿真试验的研究，其中SIMULINK是一个进行动态系统建模、仿真和综合分析的集成软件包。从分析研究角度讲，SIMULINK模型不仅能让用户知道具体环节的动态细节，而且能让用户清晰地了解各器件、各子系统、各系统间的信息交换，掌握各部分之间的交互影响。最后，阐述了变截面涡轮增压柴油机的工作原理并对其模型进行了系统描述，建立了涡轮增压柴油机系统的动力学模型。通过稳定边界法设计PID控制器，在MATLAB／SIMULINK仿真环境下对涡轮增压柴油机系统的动力学模型进行仿真分析。验证涡轮增压柴油机系统的性能以及采用电控变截面调节以后，对于柴油机性能的改善。并利用MATLAB仿真工具对增压器的非线性动力学模型进行线性化处理，利用适当简化的方法，建立的变截面涡轮增压柴油机准线性模型，在SIMULINK仿真环境下能满足动态仿真的实时性要求，方便快捷地分析仿真结果。可以通过仿真来研究变截面涡轮增压系统的控制方法及其可行性，并可以为不同的工况，确定不同的PID控制参数。通过仿真来研究电控变截面涡轮增压系统对增压柴油机的理论研究和现实应用都具有指导意义。更多还原

【Abstract】 Turbocharger Electronic control System may take full advantage of the exhaust gas energy of Diesel Engine and get over the problem in general gained press which is fall short of wrest rules in the time of low speed and the problem that the engine can’t works with full capacity when in part load, the transient response remains slow, it can improve the capability of low speed at the same time high speed and heighten the power of the engine and improve the fuel economy and reduce the influence of pollution and yawp. The Variable Geometry Turbocharger Electronic control System has become the development direction of Turbocharger nowadays, in this paper ,the diesel engine of Turbocharger is the object of research, we set up the dynamic model of the Variable Geometry Turbocharger Electronic control diesel engine in MATLAB and study its capability and the means and parameter of control.In the first place ,we explain the matching between the VGT and the diesel engine and analyse between the parameter relation of engine and the nozzle area, then, we introduce the increment PID control method and MATLAB environment, at last ,a real time model for simulating transient conditions of vehicle turbocharged diesel engines has been presented to research and develop the electronic-controlled turbocharged diesel engines, the system is divided into four part, that is , compressor .engine ,variable geometry area ,and turbine from the viewpoint of system control, the time between two working cycles is taken as calculation time step, and the mean parameters of each working cycle as calculation purpose, the model has such advantages as shorter calculation time and better real time characteristics, the model is used to simulate the transient conditions of a vehicle turbocharged diesel engine with variable geometry area . the calculated results show that the calculation accuracy can meet the needs of real time transient modeling and may analyze simulation result which is very convenience, this is very instruct significance in the theory and appliance field of turbocharged diesel engine too.更多还原