中国空间科学技术

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物-伞系统运动稳定性初探

李大耀，李大治   

  1. 北京空间机电研究所，江苏省南通医学院
  • 发布日期:1996-02-25

A PRELIMINARY STUDY ON MOTION STABILITY OF BODY-PARACHUTE SYSTEM

Li Dayao(Beijing Institute of Space Machine and Electricity,Beijing 100076)Li Dazhi(Nantong College of Medicine,Nantong 326001)   

  • Published:1996-02-25

摘要： 弹道－升力式再入飞行器常采用旋成体外形，但其质心偏离对称轴（纵轴）设置。这种飞行器在着陆前要采用降落伞作为主减速手段。研究质心偏离对称轴的旋成体与降落伞组成的系统的运动稳定性是一项有工程实践意义的课题。作为一种初步探索，在把降落伞视作刚体的条件下，按该系统平面运动方程考察其在平衡状态附近的稳定性，给出了运动稳定性判据。

关键词: 回收装置, 运动方程, 运动稳定性, 研究

Abstract: he ballistic-lifting reentry vehicle usually is a revolution bodywith its off-axis mass center.This vehicle uses parachute as a principal deceleration means in the last stage of its returning trip to the ground.A study of the motion stability of the combined system that consists of a revolution body with itsoff-axis mass center and a parachute is of practical significance in engineering.Asa preliminary discussion,the system's stability around its equilibrium is examinedand the criteria of the motion stability are given with rigid body model ofparachute assumed and based upon the system's equation of plane motion.