科创中国

Entry trajectory generation based on quasi-three-dimensional acceleration guidance

• 摘要：

  A new entry trajectory planning approach based on quasi-three-dimensional acceleration guidance for hypersonic glide vehicles is proposed. In order to improve the maneuvering capability of entry vehicles, the planner proposed in this paper leave both angle of attack and bank be free, which means the traditional Shuttle type planner will not work. To settle the problem, the planner plans a quasi-three-dimensional acceleration profile, satisfying all path constraints from initial to the target firstly. In this paper, the generation of reference profile is divided into scheming two sub-profiles, longitudinal drag profile and lateral acceleration profile in series and the key is how to obtain the lateral profile with planned drag profile. Secondly, a reduced order dynamics is obtained with the extraction longitudinal motion parameters from drag profile. Based on the reduced order dynamics, a Newton iteration scheme is employed to generate the reference profile with initial drag and lateral acceleration profile. Corresponding to the reference profile, the standard trajectory and control variables can be extracted. Finally, to track the standard profile, a PD feedback law is developed. And Simulations with CAV-H model show that both the standard and actual 3-D trajectory generated by tracker can meet the path constraints and flight task requirements.

• 作者：

  Yuan Long Zhang;Ke Jun Chen;Lu Hua Liu;Guo Jian Tang;为民 包

• 刊名：

• 在线出版时间：

  2016-8-26