基于模型参考滑模控制的柴油机气路控制研究

Diesel Engine Air-path Control Research Based on Model Reference Sliding Mode Control Algorithm

为了提高柴油机低温燃烧(LTC)模式下的综合性能,使用GT-Power软件建立了某柴油机的复杂气路系统仿真模型,并且基于该模型采用模型参考滑模控制算法设计了控制器,采用GT-Power和MATLAB/Simulink软件耦合仿真验证该控制器的效果,并与独立PI控制器进行对比。结果表明,该算法可以实现对进气阀关闭时刻(IVC)进气压力和氧气质量分数的主动控制,在瞬态工况下具有较高的控制精度,并且具有建模简单和鲁棒性强的优点。

This paper established a complex simulation model by GT-Power for diesel engine air-path system in order to improve comprehensive performance of diesel engine operating low temperature combustion. Based on the model, a controller with Model reference sliding mode control algorithm was designed, and was compared with PI algorithm on the effects of the controller evaluated by co-simulations using GT-Power and MATLAB/Simulink. The result unveiled that active control of intake pressure and oxygen mass fraction in IVC can be realized by the algorithm. Under transient oper- ating conditions, the control algorithm has significant merits such as preferable controlling precislon, simple modeling and robustness and so on.