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按照飞行模拟器的要求,建立了飞行仿真系统模型,包括六自由度全量运动方程模块、气动参数模块、发动机模块、起落架模块、环境模块、机体轴合外力/力矩模块等。该系统能够根据驾驶杆的输入,响应飞机当前的状态。用死区定值法解决了六自由度方程奇异点的问题。设计了基于遗传算法的配平方法,使初始飞行状态更接近平衡点。在Simulink环境下实现各模块的功能,进行定常直线、水平盘旋、翻筋斗等仿真实验。结果表明模型的初始状态接近平衡点,计算过程稳定,克服了飞行动力学仿真的奇异值问题,能够真实地反映飞机的实际特性。
According to the requirements of the flight simulator, the flight simulation system model is established, including six degrees of freedom full-motion equation module, aerodynamic parameters module, engine module, landing gear module, environmental module and body shaft external force / torque module. The system responds to the current state of the aircraft based on the input of the steering column. Dead-zone method is used to solve the problem of singularity of six degree of freedom equation. The method of trim based on genetic algorithm is designed to bring the initial flight state closer to the equilibrium point. In the Simulink environment to achieve the function of each module, the constant linear, horizontal hovering, tumbling and other simulation experiments. The results show that the initial state of the model is close to the equilibrium point, the calculation process is stable, the singular value problem of flight dynamics simulation can be overcome and the actual characteristics of the aircraft can be truly reflected.