Science China Technological Sciences

, Volume 61, Issue 2, pp 273–284 | Cite as

Trajectory generation of heat load test based on gauss pseudospectral method

  • YuanLong Zhang
  • LuHua Liu
  • GuoJian Tang
  • WeiMin Bao
Article
  • 18 Downloads

Abstract

A new trajectory generation for heat load test is proposed based on gauss pseudospectral method within limit range. Firstly, with multiple path constraints and flight task requirements taken into consideration, heat load parameters are introduced into the dynamics equations. In order to solve the problem of generating such a trajectory within limit range rapidly, the dynamics equations have been normalized by Earth related parameters. Secondly, since the gauss pseudospectral method is just employed to solve the discrete nonlinear programming problem, transformations are developed, which can relate the Lagrange multipliers of the discrete nonlinear programming problem to the costates of the continuous optimal control problem. In addtion, another approach of trajectory generation by tracking the given heat rate is also presented. Finally, simulation results with common aero vehicle (CAV-H) show that the trajectories obtained by both methods can well perform the heat load test with high stagnation heating rate and the large total aeroheating amount; meanwhile, gauss pseudospectral method is better than the compared one in the given range. Furthermore, the 3-D trajectory states and control variables, angle of attack and bank, which are generated by gauss pseudospectral method, can change smoothly.

Keywords

hypersonic glide vehicle trajectory generation heat load test gauss pseudospectral method 

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  • YuanLong Zhang
    • 1
  • LuHua Liu
    • 1
  • GuoJian Tang
    • 1
  • WeiMin Bao
    • 1
    • 2
  1. 1.College of Aerospace Science and EngineeringNational University of Defense TechnologyChangshaChina
  2. 2.China Aerospace Science and Technology CorporationBeijingChina

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