Affiliation of Author(s):自动化学院
Journal:Harbin Gongcheng Daxue Xuebao
Abstract:We study winglet climbing trajectory with minimal least fuel consumption and propose a solution based on Gaussian pseudo spectral method by comprehensively considering the influence of factors, such as the changes in the speed of sound, density, gravity, and engine thrust on the flight-climbing trajectory of aircrafts in near-space. We exploit the variable telescopic wing aircraft winglet to solve the problems of winglet expansion and contraction and fuel saving encountered by near-space morphing hypersonic aircraft in the climbing period. We perform the interpolation fitting of the pneumatic telescopic wing aircraft to obtain aerodynamic data. Moreover, we combine the Gauss pseudo spectral method and sequential quadratic programming to solve the problem of quantity control, state variables, boundary condition, and road king constraints. We obtain the climb trajectory and winglet stretching process with the optimal fuel economy. Simulation results show that our method has a good optimization effect on winglet stretching during the climbing flight of near-space morphing hypersonic aircrafts and can provide considerable fuel savings for the cruise section of the aircraft. © 2019, Editorial Department of Journal of HEU. All right reserved.
ISSN No.:1006-7043
Translation or Not:no
Date of Publication:2019-06-05
Co-author:Xu, Wenying,Jiang, Shuoying,Zheng, Yalong
Correspondence Author:Jiang Ju
Date of Publication:2019-06-05