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飞行力学模块、约束力模块和气动力模块是构成飞行器级间分离建模仿真的三个主要部分。这三个部分相互耦合,给求解带来困难。为解决这类仿真问题,提出一种综合建模方法。该方法包括:飞行力学运动方程;CFE(Constraint Force Equation)方法求解约束力;CFD(Computational Fluid Dynamics)方法求解气动力和碰撞分析。其中,气动力模块计算得到气动载荷,输入到约束力的计算中;约束力模块得到的飞行器速度和角速度输入到飞行力学模块,经积分得到位置和姿态信息;而这些速度、位置和姿态信息又反馈到气动力模块中,构成一个回路。碰撞分析模块用来计算仿真终值条件。
Flight mechanics module, restraint module and aerodynamic module constitute the three main parts of the aircraft-level separation modeling and simulation. These three parts are coupled to each other, which brings difficulties to the solution. To solve this kind of simulation problem, a comprehensive modeling method is proposed. The method includes the equations of motion of flight mechanics, the method of Constraint Force Equation (CFE) and the Computational Fluid Dynamics (CFD) method for solving aerodynamic forces and collision analysis. Among them, the aerodynamic module calculates the aerodynamic load and inputs it into the calculation of the restraint force. The aircraft velocity and angular velocity obtained from the restraint module are input to the flight mechanics module to obtain the position and attitude information through integration. These velocity, position and attitude information Feedback to the aerodynamic module, constitute a loop. The collision analysis module is used to calculate the simulation final value condition.