运载火箭飞行力学环境虚拟试验及可视化系统设计与实现

Design and Implementation of Virtual Test and Visualization System for Launch Vehicles’ Flight Mechanical Environments

摘要:

运载火箭的飞行力学环境随着飞行过程不断发生变化,而当前无论是基于实物试验还是基于数值分析,火箭的飞行力学环境分析大多针对特定飞行状态和工况而无法给出动态变化信息,因此开展了飞行力学环境虚拟试验及可视化技术研究。基于特征代理模型采用Fortran语言设计了场数据快速预测算法,在采样数值仿真的基础上实现了火箭在大气飞行过程中的动态气动力与气动热环境虚拟试验；采用C++开发了实时分站载荷算法,实现了火箭飞行期间的载荷环境虚拟试验。开发了与运载火箭飞行仿真配合的总线通信接口,并基于EnSight开发了分布式动态可视化系统,通过共享内存的进程间通信方式实现了飞行力学环境的动态显示。结果表明,该系统可以给出火箭飞行力学环境的全局和关注点信息的动态变化,为飞行力学环境精细化分析和直观可视化研究提供了手段。

Abstract:

The flight mechanical environments always change, accompanied by the flight process of the launch vehicles. The environmental analyses are usually carried out for specific situations and cannot depict dynamic information, whether by experiments or by numerical simulations. Therefore, technical research on virtual test and visualization is given for the flight environments. Based on characteristic surrogate model method, field data depiction algorithm is developed using Fortran. Virtual tests of dynamically aerodynamic and aerothermal environment then are implemented using this algorithm on the basis of sampling numerical simulations. Real-time load computations are developed by C++, and virtual tests of dynamic load are realized. Bus interface is developed for the communication to flight simulation platform, and distributed visualization system is developed based on EnSight. Inter-process Communication is selected to qualify the dynamic display of flight environment. The results show that, the system can give overall and detailed information, which can provide means for refined analyses of flight environments and intuitively visual research.