伞—载系统拉直过程动力学仿真研究进展

Review of Deployment Research on Dynamics Simulation of Parachute-Payload System

降落伞拉直过程是关系到伞-载系统安全可靠工作的关键阶段,涉及到三维空间多体系统动力学和变质量变自由度动力学问题。本文综述了柔性降落伞拉出过程动力学仿真技术中的一些关键问题。首先从拉直过程仿真方法进行介绍,通过具体算例分析了各自方法的特点。然后构建了动力学模型中主要因素之间的相互关系,分析了气动力的影响因素及风速对拉出过程的影响。同时阐述了绳段张力的几种计算模型及其特点,指出了它们的一般应用范围。最后,对伞-载系统拉直过程仿真减小数值计算误差的途径及未来需要关注的几个方面进行了探讨。

The parachute deployment process is the key stage to ensure the safety and reliability of para- chute-payload system. The deployment system is a complex non-linear dynamic system involved in vari- able quality and freedoms of three-dimensional multi-body objects. Some key problems of flexible para- chute deployment dynamic simulation technology are discussed. The simulation methods are introduced at first and the characteristics of each method are analyzed by actual numerical examples. Then, the re- lationship between main factors of deployment dynamic model is constructed and the influence of wind velocity on deployment process is analyzed. Moreover, some tension model and their features are given, and the application ranges of these tension models are pointed out. Finally, several problems of para- chute deployment simulation are proposed, such as the way to decrease the error and some ones that should be taken into account in the future.