基于AMESim模型的实时化简

摘要

针对航空发动机主燃油液压机械系统搭建的高保真模型无法进行实时仿真的问题,提出用活性能量指数配合线性频域分析的方法,分析化简已有的液压机械系统模型.通过计算模型中各个子元件的能量活性指数并结合线性频域分析,判断出其中能量活性指数低且固有频率远高于控制系统关注频带的子模型,并对其删除或修改,实现对原有模型的化简,以满足实时仿真需求.利用航空发动机实时仿真平台试验仿真结果表明,修改后的模型在保证精度的前提下,不仅缩短了仿真的时间而且满足了实时仿真的要求.%As the turbofan engine hydro - mechanical main control system model is complex, the computational is not able to run in real time.To reduce the complex system the method based on activity index and linear frequency domain analysis is put forward .The activity index can identify the most energy- active components of a system and the most energy - passive components and linear frequency analysis helps to determine the range.The sub- models which is energy- passive and with high eigen frequency should be deleted or modified by this method to reach the target for Real- time simulation.The Real- time model is tested on the aerospace Real- time simulation platform and the results show that the modified model is a precise one which shorten the simulation time and meet the requirements of real- time simulation.