Inicio  /  Aerospace  /  Vol: 9 Par: 11 (2022)  /  Artículo
ARTÍCULO
TITULO

Transition Flight Trajectory Optimization for a Flapping-Wing Micro Air Vehicle with Unsteady Vortex-Lattice Method

Sang-Gil Lee    
Hyeon-Ho Yang    
Reynolds Addo-Akoto and Jae-Hung Han    

Resumen

Flapping-wing micro air vehicles (FWMAVs) have the capability of performing various flight modes like birds and insects. Therefore, it is necessary to understand the various flight modes of FWMAVs in order to fully utilize the capability of the vehicle. The unique flight modes of FWMAVs can be studied through the trajectory optimization. This paper proposes a trajectory optimization framework of an FWMAV. A high-fidelity simulation model is included in the framework to sufficiently consider the complicated dynamics of the FWMAV. The unsteady aerodynamics are modeled with the unsteady panel method (UPM) and the unsteady vortex-lattice method (UVLM). The effect of wing inertia is also considered in the simulation model. In this study, transition flight trajectories are searched with the proposed framework. An optimal control problem is formulated for the transition flight from hovering to forward flight and transcribed to the parameter optimization problem with the direct shooting method. The cost function is defined as energy consumption. The same converged solution can be obtained with different initial guesses. The optimization results show that the FWMAV utilizes the pitch-up maneuver to increase altitude, although the forward speed is reduced. This pitch-up maneuver is performed more actively when the target velocity of transition is low, or the wind condition is favorable to acceleration.

 Artículos similares

       
 
Jason Cornelius, Sven Schmitz, Jose Palacios, Bernadine Juliano and Richard Heisler    
This work details the development and validation of a methodology for high-resolution rotor models used in hybrid Blade Element Momentum Theory Unsteady Reynolds Averaged Navier?Stokes (BEMT-URANS) CFD. The methodology is shown to accurately predict sing... ver más
Revista: Aerospace

 
Yanxin Yin, Ruiyang Lu, Jianxin Liu and Zhangfeng Huang    
Temperatures within the boundary layers of high-enthalpy hypersonic flows can soar to thousands or even tens of thousands of degrees, leading to significant real gas phenomena. Although there has been significant research on real gas effects on hypersoni... ver más
Revista: Aerospace

 
Feng Guo, Ming Liu, Guozhong He, Junhui Zhou, Jianfeng Zhu and Yancheng You    
An aircraft/engine integrated optimal control method is proposed for turbine-based combined cycle (TBCC) engines based on the Gauss pseudospectral method. The optimal flight trajectory and TBCC control law are obtained for a TBCC-powered aircraft, and th... ver más
Revista: Aerospace

 
Huadong Li, Yiliang Liu, Daochun Li, Dawei Bie and Zi Kan    
The marsupial unmanned aircraft system (UAS) consists of a large parent unmanned aerial vehicle (UAV) and multiple small children UAVs that can be launched and recovered in the air. The employment of marsupial UAS can expand the mission range of small UA... ver más
Revista: Aerospace

 
Jiawei Kang, Shangwen Yang, Xiaoxuan Shan, Jie Bao and Zhao Yang    
Exploring the delay causality between airports and comparing the delay propagation patterns across different airport networks is critical to better understand delay propagation mechanisms and provide effective delay mitigation strategies. A novel attenti... ver más
Revista: Aerospace