某船对转舵桨推进系统紧急倒车过程仿真

Simulation of Emergency Reversing Process of Ship's Contra-Rotating Azimuth Propulsion System

基于Matlab/Simulink平台建立了某保障船推进系统仿真模型,开展了紧急倒车过程仿真和机动性分析。采用PI控制器设计机—桨联合控制方法,对倒车过程中对转舵桨的转向和柴油机的转速进行调控,得到柴油机的临界转速,此时对转舵桨的转向快慢将不会造成柴油机超负荷现象;针对全速航行条件下的紧急倒车过程,提出了对转舵桨转向时间与柴油机减速时间匹配图谱。所得结论对于制定船舶紧急倒车工作制、保护柴油机安全运行、挖掘机动性具有指导意义。

Based on Matlab/Simulink platform,a simulation model of the propulsion system of a certain support ship was established,the simulation and mobility analysis of emergency reversing process was carried out.The PI controller was used to design the engine-propulsion joint-control method,which could control the propulsion steering and the engine speed in the course of reversing.The critical speed of the diesel engine was obtained,and the propulsion steering speed would not cause the overload of the diesel engine.The matching diagram of the steering time and the deceleration time was presented as for the process of emergency reversing when navigating at full speed.The conclusions are of guiding significance for establishing the emergency reverse system,protecting the reliable operation of diesel engine and excavating maneuverability.