采用空气阻力修正的火箭残骸落点算法  

The fall point arithmetic of rocket wreckage adopting atmosphere resistance modification

作　　者：何京江[1,2] 魏志东[2] 董继辉[2] 魏善碧[3] 

机构地区：[1]西安交通大学电信学院,陕西西安710049 [2]西昌卫星发射中心,四川西昌615000 [3]重庆大学自动化学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2012年第10期99-103,共5页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(60974090)

摘　　要：针对火箭分离后残骸落点计算问题,分析了火箭残骸在下落过程中的动力学特性,重点就空气阻力对残骸落点产生的影响进行研究,提出了带空气阻力修正的火箭残骸落点算法。与传统落点计算方法不同之处在于,该算法充分考虑落点地区的大气分层空气密度的影响,并根据下落过程空气动力学方程,估计空气阻力因子,采用积分法计算残骸在空中的运动轨迹并得到最终的落点数据。最后计算分析了4次卫星发射任务(对应4种火箭型号)一级残骸的落点,对算法的有效性进行了验证。For the fall point calculation problem of Rocket Wreckage,the kinetic traits of rocket wreckage is analyzed, and the influence of the atmosphere resistance to wreckage fall point is studied mainly. The fall point algorithm of rocket wreckage adopting atmosphere resistance modification is proposed. Comparing with the traditional fall point algorithm, in the proposed method, the influence of layered atmosphere density of fall-point area is considered properly, and the air resistance coefficient is estimated according to the air dynamic equation of fall process, the integral method is adopted to get the moving track of the rocket wreckageand the final fall point. The effectiveness of the algorithm is validated by analyzing the fall points of the first stair of the rocket in four tasks corresponding to four types of rockets.

关 键 词：空气阻力 空气密度 落点算法 

分 类 号：TM571.6[电气工程—电器]