In this paper, the multibody parachute-payload system is simplified and analyzed. A six-degree-of-freedom rigid body flight dynamic model is established to calculate the flight trajectory, attitude, velocity, and drop point of the parachute-payload system. Secondly, the random interference factors that may be encountered in the actual airdrop test of the parachute system are analyzed. According to the distribution law of the interference factors, they are introduced into the flight dynamic model. The Monte Carlo method is used to simulate the target and predict the flight trajectory and landing point distribution of the parachute system. The simulation results can provide technical support and theoretical basis for the parachute airdrop test. Finally, the genetic algorithm is used to identify the aerodynamic parameters of the large-scale Disk-Gap-Band parachute. The simulation results are in good agreement with the test results, which shows that the research method proposed in this paper can be applied to study practical engineering problems.

中文翻译：

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大型降落伞飞行轨迹仿真与气动参数辨识

本文对多体降落伞有效载荷系统进行了简化和分析。建立了六自由度刚体飞行动力学模型，以计算降落伞有效载荷系统的飞行轨迹，姿态，速度和下降点。其次，分析了降落伞系统实际空投测试中可能遇到的随机干扰因素。根据干扰因子的分布规律，将其引入飞行动力学模型。蒙特卡罗方法用于模拟目标并预测降落伞系统的飞行轨迹和着陆点分布。仿真结果可为降落伞空投试验提供技术支持和理论依据。最后，遗传算法用于识别大型Disk-Gap-Band降落伞的空气动力学参数。仿真结果与试验结果吻合较好，表明本文提出的研究方法可用于实际工程问题的研究。