面向对象的推进剂加注系统建模与故障仿真

Object-oriented Modeling and Fault Simulation of Propellant Filling System

为了在缺乏故障样本的情况下提高液体火箭发动机推进剂加注系统的可靠性和安全性,亟需进行加注系统的建模和故障仿真。为此,采用面向对象的建模方法,提出了在Dymola环境下使用新的建模语言Modelica对加注系统进行建模和仿真的思路,并在理想模型的基础上通过调整模型和改变模型参数的方式进行故障仿真。结果表明,该方法能快速搭建系统模型,并得出有效的故障仿真结果。

For lacking of fault samples, it is very difficult to detect the faults of liquid rocket engine propellant filling system and then to improve the reliability and security of the system. So modeling and fault simulation are urgently needed. According to the principles of objected-oriented modeling, a new method using Dymola based on Modelica was proposed for modeling and simulation of the filling system, fault simulation was processed by altering the models or resetting their parameters. With the analysis of simulation resuits, it shows that this method can improve the modeling efficiency evidently, and gain available simulation results.