喷水推进船舶柴油机调速系统广义对象建模及验证

摘要

The structure of the rotation speed control system for the diesel engine equipped in a water-jet propulsion speed boat is investigated.A generalized diesel engine model which takes the diesel injection manipulating signal as input and the engine rotation speed as output is established.The model parameters are identified by using the data from a real speed boat.The comparison between the identification results and the measured data indicate the strong nonlinearity of the generalized diesel engine plant.It is demonstrated that the piecewise low order models proposed are able to describe the plant in steady state and transients.%分析了装备在某喷水推进快艇上的柴油机调速系统,以喷油量控制电机的角度信号作为输入,柴油机主机转速作为输出,建立了柴油主机广义对象模型,利用实测数据对模型参数进行了辨识.模型输出值与实测值对比结果表明,柴油主机广义对象是强非线性的,建立的分段低阶等效模型能够较好的描述广义对象的动态及稳态性能.