摘要
输出扭矩是柴油机电控和状态观测的一个重要参数。由于非接触式动态扭矩传感器价格高昂,不适合大规模的扭矩测量应用,因此,建立准确的扭矩模型是克服这一困难的捷径,对控制和状态观测都具有重要的意义。在常用于稳态仿真的容积法模型基础上,结合曲柄连杆机的动力学模型,建立了大型低速船用柴油机的扭矩预测模型;采用线性插值法简化燃油燃烧放热规律参数的计算;借助"浓排气"模型提高扫气过程的计算速度;并以6S60M C大型低速船用柴油主机为例,进行了仿真计算。结果显示,仿真示功图与实测图基本吻合,可准确预测多缸柴油机扭矩的变化。
Output torque is an important parameter for the control and the state observation of diesel engine, but non-contact dynamic torque sensor is too expensive to suit large-scale application. Establishing a torque prediction model is a shortcut for overcoming the difficulty, and has significance for the control and the state observation of diesel engine. Based on control volume model often used for steady state simulation and crank-connecting rod model, the torque prediction model for a large-scale low-speed marine diesel engine is established in this paper. Parameters of the combustion heat release rule are calculated by linear interpolation. Gas exchange process is simulated by ＂dense exhaust gas＂ model. These two methods will improve speed of calculating. Taking the 6S60MC large-scale lowspeed marine diesel engine as an example, system simulation is conducted. The results show that the indicator diagram obtained from the simulation is consistent with experimental indicator diagram. The model can predict the torque of multi-cylinder diesel engine precisely.
出处
《中国造船》
EI
CSCD
北大核心
2008年第1期97-102,共6页
Shipbuilding of China
基金
高等学校博士学科点专项科研基金(项目编号:20030151005,)
关键词
船舶
舰船工程
船用柴油机
扭矩预测
容积法模型
曲柄连杆机构
ship engineering
marine diesel engine
torque prediction
control volume model
crankconnecting rod framework
