The fuel optimal control problem of a hypersonic aircraft with periodic cruising mode

General Periodic Cruise Guidance Optimization for Hypersonic Vehicles

“…Besides chemical processes, cruise control of automobiles and aircrafts is a typical application of periodic control during long-period normal operations because of the economic reasons [10][11][12][13][14][15][16][17][18][19][20]. According to [11][12][13][14][15][16][17][18][19][20], a flight vehicle cruising at non-constant altitudes and velocities with proper power switches may save the fuel consumption to some extent, or it can fly at a longer range. For example, the thrust can be switched off during the descending phase in a cycle such that the gravitational force can be fully utilized to reduce the velocity loss, while the thrust can be switched on again at a certain time in the ascending phase to compensate for the velocity loss.…”

Fuzzy Optimal Tracking Control of Hypersonic Flight Vehicles via Single-Network Adaptive Critic Design

“…Most of the methodologies mentioned above however are aimed at guaranteeing steady-state performance and transient performance for hypersonic flight control systems under different actual conditions including uncertainties, disturbances and actuator saturations/faults. Unfortunately, only such basic performance isn't enough for hypersonic flight control and instead we must further seek some optimal performance indexes [23]- [27]. Adaptive critic design (ACD) is a newly emerging methodology to solve optimal control problems, and Fuzzy optimal tracking control of hypersonic flight vehicles via single-network adaptive critic design Xiangwei Bu*, Qiang Qi H it has many possible uses in the optimal control of simple dynamic systems.…”

“…1) The control structure complexity is low via concise SACD for the sake of guaranteeing real-time performance. Different from the existing studies [27], [28], [33], this paper proposes a single-adaptive-parameter-based strategy to construct the critic network which has only one adaptive parameter.…”

Optimization on steady-state cruise for a hypersonic vehicle

“…Now researches on hypersonic vehicle have been studied frequently in recent years.Developing hypersonic vehicles is an important trend of world aerospace industry in the twentyfirst century. However,with high flight speed and large space maneuverability,the hypersonic technique faces many technical problems,such as communication,engine performance, heat-resistant insulation materials and so on [2].Some topics such as finding optimal guidance,trajectories and proper control under different conditions were done in [3][4][5][6].Murillo and Lu [3] applied the calculus of variation method to get the optimal ascent trajectories of the hypersonic vehicle.Fidan et al [4] discussed the new direction of the flight dynamic and control of the vehicle.…”