Trajectory shaping guidance law based on virtual angle with terminal constraints

来源 :Journal of Systems Engineering and Electronics | 被引量 : 0次 | 上传用户:fukuilover123
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A trajectory shaping guidance law based on virtual angle (TSGLBVA) is proposed for a re-entry vehicle with the constraints of terminal impact angles and their time derivatives.In the view of differential properties of the maneuvering trajectory,a virtual angle and a virtual radius are defined.Also,the shaping trajectory of the vehicle is established by the polynomials of the virtual angle.Then,four optimized parameters are selected according to the theorem of parameters transformation presented in this paper.Finally,a convergent variant of the Nelder-Mead algorithm is adopted to obtain the reference trajectory,and a trajectory feedback tracking guidance law is designed.The simulation results demonstrate that the TSGLBVA ensures the re-entry vehicle to impact a target precisely from a specified direction with small terminal load factor command,as well as to obtain a maximum or constrained terminal velocity according to various requirements. A trajectory shaping guidance law based on virtual angle (TSGLBVA) is proposed for a re-entry vehicle with the constraint of terminal impact angles and their time derivatives. In the view of differential properties of the maneuvering trajectory, a virtual angle and a virtual radius are defined. Also, the shaping trajectory of the vehicle is established by the polynomials of the virtual angle. Then, four optimized parameters are selected according to the theorem of parameters presented presented in this paper. Finkally, a convergent variant of the Nelder-Mead algorithm is adopted to obtain the reference trajectory, and a trajectory feedback tracking guidance law is designed. simulation results demonstrate that the TSGLBVA ensures the re-entry vehicle to impact a target precisely from a specified direction with small terminal load factor command, as well as to obtain a maximum or constrained terminal velocity according to various requirements.
其他文献
目的评估老年无移位型股骨颈骨折空心加压螺钉内固定的长期疗效。方法回顾性收集南京大学医学院附属鼓楼医院有完整随访资料的老年无移位型股骨颈骨折患者42例,患者接受空心
提出加工椭球面的截面包络法,采用VB编程实现了该算法并在此基础上生成NC程序。经实践验证,用截面包络法加工椭球面克服了等间隔参数法加工残留量不均匀、表面质量和加工效率不
《一句顶一万句》微妙地折射出中国乡镇近百年的变迁,特别是在变化的生存环境中,人们感受世界、认识自我的方式正在发生变化。当故乡已无法回去,家族变得若即若离的时候,当基
为促进安徽省生态文明建设,论文采用生态足迹模型,定量评价了安徽省生态经济可持续发展现状,发现安徽省生态资源构成的不足;采用时间序列分析法展现了安徽省生态可持续发展的
对综合计算使用的寿命周期、土地机会成本和对突发故障和风险产生的费用等各种基本要素进行分析评估,体现了电网规划设计要点的综合性和专业性。文中以全国的电网为大背景讨
中国与美国的中学语文教材存在明显的异同点。主要不同点表现在编写者、出版发行者、教材类型、编写所依据的教育哲学、编写体例、学法指导、语文能力的训练模式、课外阅读的
目的探讨并测定湖南产半夏药材炮制前后尿苷、鸟苷含量的变化。方法采用《中国药典》及文献记载的方法炮制半夏药材,用HPLC法测定尿苷和鸟苷的含量。应用Agilent ZORBX SB-C1
介绍了一种零件表面粗糙度的激光在线测量方法,该测量方法具有测量速度快且能够显示被测表面的具体形貌等优点.在测量中引入激光三角测量系统,用无衍射激光光束作光源,用高精度的