【摘要】 为克服由于试验或飞行数据不足而无法获取系统足够故障模式的问题 ,开展了液体火箭推进系统故障过程建模与计算机仿真研究工作。结合具体的模型系统 ,研究了各组件统一的故障描述方法 ,形成了表征系统故障过程的方程组。针对故障方程组的超强刚性和非线性特性问题 ,研究了解决该问题的数学方法。给出了系统故障过程的具体仿真实例以及与实际试车结果的对比分析 ,结果表明所建模型和数值求解方法对于研究液体火箭推进系统的故障过程是合理和有效的更多还原

【Abstract】 To overcome the difficulties on acquiring enough fault modes from ground and flight test data, the failure process for liquid propellant rocket propulsion systems was modeled. For a specific model system, a uniform description method of system failures was used to develop the equations for describing failures of the model system. Since the equations are very stiff and nonlinear, the Runge Kutta method with a variable step and the Treanor method was used respectively to solve the equations. The large number of examples from the computer simulations of the system failures were compared with the results of fire tests, and results demonstrate that the model and methods developed in this research are sound and valid.更多还原