关于弹性运载火箭姿态稳定性控制研究

发布时间：2018-01-10 22:25

本文关键词：关于弹性运载火箭姿态稳定性控制研究　出处：《计算机仿真》2016年04期 　论文类型：期刊论文

【摘要】：研究大长细比运载火箭的姿控系统的优化问题,对保障火箭的稳定飞行具有重要意义。在设计中,经常遇到弹性模态和控制系统交联严重的问题,应用传统的固定参数滤波器难以保证刚性和弹性箭体同时具有足够的稳定裕度。针对上述问题,设计了SMM自适应滤波器,具有计算量小、收敛迅速等优点。经仿真验证,上述方法可以对弹性噪声进行自适应估计与滤波,在保证弹性系统裕度的同时,显著提高了低频刚体的幅相稳定裕度,保障了弹性箭体的稳定控制,为火箭姿态稳定性研究提供科学依据。
[Abstract]:It is very important to study the optimization of attitude control system of large aspect ratio launch vehicle, which is very important to ensure the stable flight of rocket. In the design, the problems of elastic mode and serious crosslinking of control system are often encountered. It is difficult to ensure that rigid and elastic quivers have sufficient stability margin by using traditional fixed parameter filters. Aiming at the above problems, a SMM adaptive filter is designed, which has small computational complexity. The simulation results show that the proposed method can be used to estimate and filter the elastic noise adaptively, and at the same time, the amplitude and phase stability margin of the low frequency rigid body can be improved significantly. It ensures the stability control of the elastic arrow and provides the scientific basis for the research of the attitude stability of the rocket.
【作者单位】：北京控制与电子技术研究所;
【分类号】：V475.1;V448.22
【正文快照】： _1弓丨言为了提高运载能力,小型固体运载火箭长细比较传统大型火箭有所增加,同时为提高有效载荷而减小结构质量,使固有振动频率较低,箭体低阶弹性振动模态容易受到外界干扰的激励,产生较大振动,对刚性箭体姿态运动的稳定性带来不利影响⑴。由于一阶弹性模态频率与刚体控制系统

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