基于PI控制器的船舶加速过程负荷控制

在Matlab/Simulink软件中建立了某"柴-燃"联合推进系统仿真模型,利用实船试航数据对模型的准确性进行了验证,对现行的加速过程控制方法进行了仿真和机动性评估.针对应急加速过程中主机严重超负荷、正常加速时主机功率冗余过大及机动性差的问题,提出了用PI控制器设计加速过程"机-桨"联合控制的方法.该方法用主机的功率冗余量作为控制器的输入,对加速过程中主机的转速和螺距的增加率进行调控.研究结果表明,使用该方法对加速过程进行控制时,避免了主机超负荷工作,且航速增加率比现行控制方法的航速增加率提高了近70%. 

Load Control of Ship Accelerating Process Based on PI Controller

A simulation model for a combined diesel or gas turbine(CODOG) propulsion system was built in Matlab/Simulink,and the veracity of this model was validated using the trail data of actual ship.Through the model,two existing accelerating control approaches were simulated and their flexibility was evaluated.The result shows that during the emergent accelerating process,the main engine is overloaded seriously;during the natural accelerating process,however,the redundancy of the engine power is big and the flexibility is low.To improve the flexibility,a method using PI controller was proposed to design the "engine-propeller" combined control curve of the accelerating process.In this method,the controller uses the engine power redundancy to adjust the increasing ratio of engine speed and propeller pitch during the accelerating process.Simulation result shows that using this method to control the accelerating process,the engine overloading can be avoided,and the increasing ratio of the ship velocity is about 70% faster than the natural accelerating process.