Systems Engineering and Electronics ›› 2022, Vol. 44 ›› Issue (3): 929-938.doi: 10.12305/j.issn.1001-506X.2022.03.25

• Guidance, Navigation and Control • Previous Articles     Next Articles

Trajectory optimization based on heat-augmented model and analysis of thermal protection structure

Tengafei ZHANG1, Chunlin GONG1, Hua SU1,*, Pengfei XUE2   

  1. 1. Shannxi Aerospace Flight Vehicle Design Key Laboratory, Northwertern Polytechnical University, Xi'an 710072, China
    2. Science and Technology on Space Physics Laboratory, Beijing 100076, China
  • Received:2021-06-08 Online:2022-03-01 Published:2022-03-10
  • Contact: Hua SU

Abstract:

In the trajectory design problem considering the temperature constraint of aircraft structure, the trajectory optimization model with general constrained heat flux has some disadvantages, such as repeated iteration, unable to consider the coupling relationship between trajectory and heat transfer. To solve these problems, a trajectory optimization model of heat transfer expansion is proposed. The heat transfer equation is transformed into a set of first-order differential equations by using spatial difference, and the system state equation of heat transfer expansion is formed with the motion equation, so that the structure temperature can be directly constrained in the trajectory optimization. The simulation of an example shows the efficiency of the solution based on the augmented model and the rationality of the result. On this basis, the interaction between reentry trajectory and thermal structure is analyzed, which provides a reference for the design of thermal structure in the scheme design stage.

Key words: trajectory optimization, heat conduction, thermal protection structure, hypersonic

CLC Number: 

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