Analytical Modeling of Shrouded Rotors in Hover with Experimental and Computational Validation by Abdallah Dayhoum, Alejandro Ramirez-Serrano, Robert J. Martinuzzi

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Numerical Modeling, Trim, and Linearization of a Side-by-Side Helicopter in Hovering Conditions by Francesco Mazzeo, Marilena D. Pavel, Daniele Fattizzo, Emanuele L. de Angelis, Fabrizio Giulietti

“…In the present paper, a flight dynamics model is adopted to represent the trim and stability characteristics of a side-by-side helicopter in hovering conditions. …”
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Longitudinal Modeling and Control of Tailed Flapping-Wings Micro Air Vehicles near Hovering by Tao Jiang, Xiaosong Yang, Hongwei Wang, Wen Gai, Long Cui

“…Then the stability of the hovering FMAV was analyzed with a modal analysis method. …”
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CALCULATED RESEARCH OF INFLUENCE OF HELICOPTER MAIN ROTORS GEOMETRY ON THE EFFICIENCY IN HOVER MODE BASED ON THE NONLINEAR VORTEX MODEL by Y. M. Ignatkin, P. V. Makeev, A. I. Shomov

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Gust Response Analysis for Helicopter Rotors in the Hover and Forward Flights by Linpeng Wang, Yuting Dai, Chao Yang

“…In current work, an effective coupled aeroelastic model based on a medium-deflection beam theory and a nonlinear unsteady aerodynamic model in the time domain were constructed. …”
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Hovering Control on a Variable-Parameters Model of a Small Unmanned Helicopter Based on a Backstepping Sliding Mode Method by Hongmei Zhang, Zhiyuan Sun, Jin Xu, Rongming Han

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A Study on Hover Performance of Ducted Fans for an Unmanned VTOL Aircraft by Young Jae Choi, Seong-Yong Wie, Sanghyun Chae

“…In this study, ground tests and numerical analysis were performed to verify the hover performance of the second ducted fan model designed by this research team. …”
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Investigation of Helicopter Blade Tip Configuration during Hover Flight Employing Computational Fluid Dynamics by Soufiane Stouti, Assel Thami Lahlou, Ismail Lagrat, Hamid Mounir, Oussama Bouazaoui

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Parameter Optimization of a Bi-copter Type Unmanned Aerial Vehicle to Avoid Propeller-induced Vibrations During Hovering by Mehmet Kursat Yalcın, İlyas Kacar, Halil Bahadır Akyıldız

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Blade element – momentum aerodynamic model of a helicopter rotor operating at low-Reynolds numbers in ground effect by Gabriel Georgiev

“… The general objective of this paper is to present the initial results obtained as an outcome of applying a coupled Experimentally Derived – Blade Element Momentum Theory (BEMT) model for evaluating the airflow-defining parameters of a hovering helicopter rotor close to obstacles and making performance predictions. …”
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COMPUTATIONAL STUDY OF AERODYNAMIC CHARACTERISTICS OF SINGLE-ROTOR HELICOPTER TAIL ROTOR UNDER THE INFLUENCE OF VORTICAL WAKE OF MAIN ROTOR AT THE HOVER WITH CROSSWIND by Yu. M. Ignatkin, P. V. Makeev, A. I. Shomov, V. A. Ivchin

“…The modelling has been made on the base of non-linear blade (free wake) vortical model of rotor, produced at Helicopter Design Department of MAI.Helicopter hovering modes with crosswind of various intensity Vz was considered. …”
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Computational investigations of Ka-226T helicopter coaxial rotor aerodynamics in the vortex ring state by P. V. Makeev, Yu. M. Ignatkin, A. I. Shomov, S. V. Selemenev

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Study on the impact of Gurney flap parameters on rotor performance improvement by LIU Shaoteng, LIU Xiangnan, SHAO Tianshuang, WANG Puyuan

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House Swallow Optimizer: A New Meta-Heuristic Algorithm and Its Application for DOA Estimation of Broadband Signal in Vector Hydrophone Array by Jie Dong, Lifu Wang, Shuhui Qiao, Peng Wang, Xiuhui Tan

“…The HSO systematically simulates 6 key survival strategies observed in house swallows—roosting, hovering, preying, nesting, breeding and seasonal migration—through a 5-phase mathematical model to achieve effective exploration-exploitation balance. …”
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Analysis of Drone Flight Stability for Building a Korean Urban Air Traffic (K-UAM) Delivery System by Sohyun Cho, Hyuncheol Kim, Jaeho Chung, Dongmin Shin

“…The Ministry of Land, Infrastructure, and Transport conducted a demonstration project targeting pilot areas to commercialize drone delivery services in urban areas and to present a standard model. In this study, flight data on drone delivery routes in Ulju and drone hovering in Yeosu were collected and analyzed for flight safety. …”
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Rendezvous Missions to Systems of Small Solar System Bodies Using the Suboptimal SDRE Control Approach by Edson Cereja, José Manoel Balthazar, Angelo Marcelo Tusset, Vladimir Razoumny, Antonio Fernando Bertachini de Almeida Prado

“…Our results, addressing the hovering of a spacecraft around relative equilibrium points on the effective potential of the Near-Earth Asteroid (16) Psyche and of the much smaller main body (called Alpha) of the triple NEA system (153591) 2001SN263, show that the known effectiveness offered by the flexibility engendered by state-dependent factorization of nonlinear models is also effective when applied in these faint and highly nonlinear force fields. …”
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A Survey of Modelling and Identification of Quadrotor Robot by Xiaodong Zhang, Xiaoli Li, Kang Wang, Yanjun Lu

“…This paper gives a tutorial of the platform configuration, methodology of modeling, comprehensive nonlinear model, the aerodynamic effects, and model identification for a quadrotor.…”
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An Efficient Approach for Modeling and Control of a Quadrotor by Ahmed S. Khusheef

“…  A quadrotor is a four-rotor aircraft capable of vertical take-off and landing, hovering, forward flight, and having great maneuverability. …”
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Fuzzy Model Predictive Control for Unmanned Helicopter by Łukasz Kiciński, Sebastian Topczewski

“…The designed system uses a Parallel Distributed Compensation architecture and utilizes multiple linear dynamics models to precisely model the helicopter’s response in transitioning from hovering to forward flight. …”
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Modeling of a Tethered Testbed for a VTVL Vehicle by Marco Sagliano, Stephan Theil, Johanna Schramm, Matthias Schwarzwald

“…The method is able to take several geometrical configurations into account and combines the classical catenary model with the elasticity theory to predict the forces acting on the lander in quasistatic conditions, i.e., in conditions of hovering, where the motion of the vehicle is reduced. …”
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