电动力绳系离轨技术是一项新颖的被动离轨技术,因其推进剂消耗低、效率高等优势,特别适用于火箭末级快速离轨任务,但也带来了动力学与控制方面的挑战。本文在分析电动力绳系火箭末级离轨任务特点基础上,针对离轨过程的系绳释放开展阶段和电动力辅助离轨阶段,开展了动力学建模及具有工程实用性的控制方案设计,并通过数值仿真验证了方案有效性。最后介绍了电动力绳系离轨系统动力学与控制的国内外试验验证进展,并提出了含末级姿态模拟器的系绳释放地面试验系统方案设想,为后续我国推动电动力绳系离轨技术的进展提供了参考。
As an innovative passive deorbit technology,electrodynamic tethered(EDT)deorbit technology is applicable to the upper-stage of launch vehicles,due to its low fuel cost and high efficiency.The present paper deals with the dynamic modeling and control problem of EDT upper-stage deorbit system.To this end,based on mission analysis,we conduct dynamic modeling and practical control scheme design for tether deployment and deorbit phase,respectively.Numerical simulations are given to validate the effectiveness of the proposed control schemes.Finally,a brief remark on state-of-the-art flight test and ground experiments is helpful for the future development of EDT deorbit technology.
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