步进电机驱动的燃油计量装置建模与仿真

Modeling and Simulation of Fuel Metering Unit Driven by Stepping Motor

为了开发数控燃油计量装置独立仿真平台,利用AMESet建立了基于C代码的步进电机部件模型;对建立的步进电机模型进行仿真,获得了其转角随输入脉冲的关系。建立了由计量活门、等压差活门、增压活门等组成的燃油计量装置机械液压组件AMESim模型,将开发的步进电机模型与计量装置各液压组件模型联结,实现了步进电机驱动的数控燃油计量装置面向对象的建模。仿真结果表明:在正常工作范围内,仿真结果与设计参考偏差在5%以内,所开发的AMESim模型能满足该数控计量装置的稳态和动态特性的研究要求。

In order to develop a independent simulation platform for digital control Fuel Metering Unit（FMU）, a C program was established to describe the stepping motor in AMESet and obtain the component level model. Simulation using the developed model in AMESim gives the relationship between rotation angle and input pulse of the motor. FMU composed mainly of metering valve, constant pressure difference valve and booster valve were modeled in AMESim. Coupling of the developed motor model and the model of hydromechanical components achieved the entire object-oriented modeling of the digital control FMU driven by stepping motor. Simulation results show that a deviation between simulation results and design reference value is no more than 5% within usual operating range, and AMESim model developed can satisfy the requirements for study on steady-state and dynamic characteristics of the unit.