Optimal periodic control of hypersonic cruise vehicle

Wang, Wenkai; Hou, Zhanqiang; Shan, Shangqiu; Guo, Tianhao; Chen, Lili

doi:10.23919/chicc.2017.8027732

Cited by 3 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The initial and final points should coincide to enclose the orbit, as shown in (20). To avoid multiple solutions caused by different initial points on the same closed orbit, one dimension of the initial point could be specified, as shown in (21). The physical significance of this initial point is the lowest altitude.…”

Section: Periodic Hypersonic Cruise Trajectory a Problem Formulamentioning

confidence: 99%

“…The optimal control problem could be expressed as one to optimize the state and control variables shown in (12) and limited by (22) and 23to maximize the performance measure of (33), while satisfying the boundary conditions in (20) and (21).…”

Section: B Reference Trajectory: Optimal Steady Cruisementioning

confidence: 99%

“…By minimizing the weighted combination of fuel and heating performances, the results show that PHC is effective to reduce mean heating flux, and that it maintains the similar performance of fuel consumption with steady cruise. The difference between [21] and the other works is the effectiveness of PHC to conserve fuel. This difference is mainly caused by the differences of propulsive and aerodynamic models, which has also been observed by Menon et al [22].…”

Section: Introductionmentioning

confidence: 96%

“…By heat load and specific fuel consumption being optimized together, Kang et al [20] figured out that heat load and fuel consumption could be simultaneously diminished by PHC, and that the two performances mutually conflict. Herein, the adopted models of HCV is referred from our previous work [21]. By minimizing the weighted combination of fuel and heating performances, the results show that PHC is effective to reduce mean heating flux, and that it maintains the similar performance of fuel consumption with steady cruise.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimal Periodic Control of Hypersonic Cruise Vehicle: Trajectory Features

et al. 2019

View full text Add to dashboard Cite

Optimal periodic control is an effective technique to reduce aerodynamic heating and fuel consumption of hypersonic cruise vehicles. Herein, this optimal control problem has been solved by nonlinear programming and passed the posteriori check of optimality. The results indicate that the lift coefficient and velocity in dynamical model could be recognized as constants. Accordingly, the original 3D system consists of velocity, flight path angle, and altitude, which could be decoupled into a 2D subsystem and a 1D one. The 2D subsystem could describe the correlation between the flight path angle and altitude. And the period length is mainly dependent on the maximum altitude difference. The 1D subsystem has been proved to be feasible to describe the variation of kinetic energy or velocity. On basis of the subsystems, the heating and fuel performances of periodic cruise have been studied. The heating performance is mainly dependent on the maximum altitude difference, and the fuel consumption is mainly dependent on the drag coefficient. The features concluded in this paper can support rapid trajectory planning or suboptimal feedback design of hypersonic cruise vehicles. INDEX TERMS Optimal periodic control, hypersonic cruise vehicle, trajectory features, performances.

show abstract

Section: Periodic Hypersonic Cruise Trajectory a Problem Formulamentioning

confidence: 99%

Section: B Reference Trajectory: Optimal Steady Cruisementioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal Periodic Control of Hypersonic Cruise Vehicle: Trajectory Features

et al. 2019

View full text Add to dashboard Cite

show abstract

“…This is commonly achieved by optimally regulating the thrust produced by the UAV propellers, attack angle, and bank angle to realize autonomous flight based on energy maximization. Closely related works in this direction investigated the possibility of finding optimal "periodic" solutions to enhance endurance rather than steady-state optimal solutions; [27][28][29][30][31][32]. This interesting subject is part of the optimal periodic control theory, which was originally motivated by problems from chemical engineering, as some studies have found that cycling a chemical reactor can increase the average output compared to steady-state operation [33].…”

Section: Introductionmentioning

confidence: 99%

Optimal Periodic Control of Unmanned Aerial Vehicles Based on Fourier Integral Pseudospectral and Edge-Detection Methods

Elgindy¹

2023

Preprint

View full text Add to dashboard Cite

This study describes the development of a novel numerical optimization framework to maximize the endurance of unmanned aerial vehicles (UAVs). We address the problem of numerically determining the optimal thrust and cruise angle of attack in a two-dimensional space for a UAV under certain initial, periodic, and bound constraints. The time horizon of the free final time optimal control problem (OCP) is first normalized, and the normalized OCP in integral form is discretized in physical space into a nonlinear programming problem (NLP) using Fourier collocation and quadrature based on equispaced points. Great attention in this work is placed on the accurate detection of jump discontinuities and resolving the thrust history effectively directly from the Fourier pseudospectral (FPS) data through a novel edge-detection method without any smoothing techniques. The numerical results demonstrate that the proposed method is simple, stable, and easy to implement.

show abstract