Document Type : Original Article

Author

Mechanical engineering department, Semnan university

10.22034/jast.2022.353879.1122

Abstract

Unmanned Aerial Vehicles (UAVs) have numerous applications in military, commercial and hobby fields. Among these vehicles, drones with vertical take-off and landing (VTOL) capability have attracted more attention due to their specific capabilities such as better maneuverability and hover flight. In recent years, numerous concepts emerged which trying to propose new configurations to enhance UAVs performance. In this paper, we propose a novel concept which integrates single main rotor helicopter and quadrotor structure to overcome some difficulties exist in those applications. This suggested configuration, include a variable pitch main rotor equipped with four smaller counterrotating rotors to overcome its opposite torque (instead of a tail rotor in helicopters) and also sustain a portion of the UAV weight which make it possible to use a smaller main rotor. This design preserves maneuverability of helicopters, while eliminates tail rotor power loss and its asymmetric lateral force and also enhances the flight stability and maneuverability by properly using other four rotors’ thrusts. Preliminary dynamic modeling and control system design are presented in the text and the results show that this idea can be investigated further. The next steps are planned to be studied in next researches.

Keywords

Main Subjects

Article Title [Persian]

A Novel Concept for VTOL Platform Combining Variable Pitch Main Rotor and Quadrotor Configurations

Author [Persian]

  • Mohammad Hossein Khalesi

Mechanical engineering department, Semnan university

Abstract [Persian]

Unmanned Aerial Vehicles (UAVs) have numerous applications in military, commercial and hobby fields. Among these vehicles, drones with vertical take-off and landing (VTOL) capability have attracted more attention due to their specific capabilities such as better maneuverability and hover flight. In recent years, numerous concepts emerged which trying to propose new configurations to enhance UAVs performance. In this paper, we propose a novel concept which integrates single main rotor helicopter and quadrotor structure to overcome some difficulties exist in those applications. This suggested configuration, include a variable pitch main rotor equipped with four smaller counterrotating rotors to overcome its opposite torque (instead of a tail rotor in helicopters) and also sustain a portion of the UAV weight which make it possible to use a smaller main rotor. This design preserves maneuverability of helicopters, while eliminates tail rotor power loss and its asymmetric lateral force and also enhances the flight stability and maneuverability by properly using other four rotors’ thrusts. Preliminary dynamic modeling and control system design are presented in the text and the results show that this idea can be investigated further. The next steps are planned to be studied in next researches.

Keywords [Persian]

  • Novel UAV Configuration
  • Conceptual Design
  • VTOL Drone
  • Helicopter
  • Quadrotor
[1] C. F. Liew and et.al., "Recent Developments in Aerial Robotics: A Survey and Prototypes Overview," arXiv preprint arXiv:1711.10085, 2017.
[2] S. Darvishpoor and et.al., "Configurations, flight mechanisms, and applications of unmanned aerial systems: A review," Progress in Aerospace Sciences, 2020.
[3] A. Saeed and et.al., "A Survey of Hybrid Unmanned Aerial Vehicles," Progress in Aerospace Sciences, 2018.
[4] Y. Zhou and et.al., "An evaluative review of the VTOL technologies for unmanned and manned aerial vehicles," Computer Communications, 2019.
[5] N. T. Hegde and et.al., "Design, dynamic modelling and control of tilt-rotor UAVs: a review," International Journal of Intelligent Unmanned Systems, 2019.
[6] V. Kumar and et.al., "A Review on Design Methods of Vertical take-off and landing UAV aircraft," IOP Conference Series: Materials Science and Engineering, 2021.
[7] C. Lee and et.al., "A Survey: Flight Mechanism and Mechanical Structure of the UAV," International Journal of Precision Engineering and Manufacturing, 2021.
[8] T. Ma and et.al., "Conceptual Design of a VTOL Box-wing UAV with Rotatable Duct-fans," AIAA Scitech 2019 Forum, 2019.
[9] M. Warren and et.al., "Design and control evaluation of a novel subscale quad-tiltrotor," AIAA Scitech 2019 Forum, 2019.
[10] L. Yu and et.al., "Immersion and invariance-based sliding mode attitude control of tilt tri-rotor uav in helicopter mode," International Journal of Control, Automation and Systems, 2019.
[11] C. Zeng and et.al., "A new tilt-arm transitioning unmanned aerial vehicle: Introduction and conceptual design," Aerospace Science and Technology, 2020.
[12] E. Tal and S. Karaman, "Global Trajectory-tracking Control for a Tailsitter Flying Wing in Agile Uncoordinated Flight," AIAA AVIATION 2021 FORUM, 2021.
[13] W. Zhou and et.al., "Position control of a tail-sitter UAV using successive linearization based model predictive control," Control Engineering Practice, 2019.
[14] P. Ryseck, D. Yeo, V. Hrishikeshavan and I. Chopra, "Aerodynamic and mechanical design of a morphing winglet for a quadrotor biplane tail-sitter," Proceedings of the Vertical Flight Society 8th Autonomous VTOL Symposium, 2019.
[15] N. Raj and et.al., "Attitude control of novel tail sitter: Swiveling biplane–quadrotor," Journal of Guidance, Control, and Dynamics, 2020.
[16] J. Liao and X. Song, "Mathematical modelling and model predictive controller design of a quad tiltrotor UAV," Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2020.
[17] S. Sridhar and et.al., "Fault tolerance of a reconfigurable tilt-rotor quadcopter using sliding mode control," Dynamic Systems and Control Conference, American Society of Mechanical Engineers, 2018.
[18] A. Lara and et.al., "Hardware-in-the-loop simulation environment for testing of tilt-rotor uav’s control strategies.," Congresso Brasileiro de Automática-CBA, 2019.
[19] T. Costa and et.al., "Modeling and Control of an Unmanned Aerial Vehicle with Tilt Rotors Equipped with a Camera," 19th International Conference on Advanced Robotics, 2019.
[20] J. Muchowski, M. Szumski and A. Krzysiak, "Aerodynamic concept of the UAV in the gyrodyne configuration," Transactions on Aerospace Research, 2019.
[21] C. De Wagter and J. Meulenbeld, "Modeling the unstable DelftaCopter vertical take-off and landing tailsitter unmanned air vehicle in hover and forward flight from flight test data," International Journal of Micro Air Vehicles, 2019.
[22] Y. Chen and et.al., "Aerodynamic characteristic analysis and layout optimization design for compound UAVs by using hybrid Fuzzy–PSO algorithm," Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2019.
[23] N. Elmeseiry, N. Alshaer and T. Ismail, "A detailed survey and future directions of unmanned aerial vehicles (uavs) with potential applications," Aerospace, vol. 8, no. 12, 2021.
[24] L. N. Santhosh and T. K. Chandrashekar, "Anti-collision pentacopter for NDT applications," in IEEE International Transportation Electrification Conference (ITEC), 2015.
[25] S. Driessens and P. EI Pounds, "Towards a more efficient quadrotor configuration," in IEEE/RSJ International Conference on Intelligent Robots and Systems, 2013.
[26] G. Cai and et.al., Unmanned rotorcraft systems, Berlin: Springer Science+Business Media, 2011.
[27] B. Ren, S. Ge, C. Chen and et.al., Modeling, control and coordination of helicopter systems, Berlin: Springer Science+ Business Media, 2012.
[28] M. H. Khalesi, H. Salarieh and H. Saadat Foumani, "Multilevel modeling of an unmanned rotorcraft and robust controller design for trajectory tracking," Modares Mechanical Engineering, vol. 17, no. 8, pp. 388-398, 2017.